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A Journal of VHF-UHF Radio Technology & Engineering 

Published by COMMtronics Engineering at PO Box 262478;San Diego, CA 92196 

Publisher/Editor: W. D. Cheek, Sr; aJuL n i)r. Rigormortis" 

Copyright © 1991-95 <A11 Rights Reserved> ISSN 1061-9240 

Volume 5, Number 3 $5.00 


Believe me, no rest during this past 
break, which really wasn’t a break. I 
used the spare time to polish off my 
forthcoming new book. The Ultimate 
Scanner . It’s all done now but the 
shouting, final edits, and a sip of the 
bubbly. I can’t tell you much more about 
it at this sitting because the Publisher 
still has a monumental task ahead, but I 
am, however, prepared to make you dear 
readers a very attractive discount offer 
for advance purchases received before 
the date of publication. Here’s the deal: 


The publisher has announced the list 
retail price of the Ultimate Scanner to be 
$29.95 effective July 1, 1995. Until 
then, the publisher’s price is $24.95. For 
advance orders only, I will take it one 
step farther and set it at $21.95 + $4 
S&H to expire on April 30, 1995. 

For orders received between May 1 - 
June 30, 1995, the price will be $23.95 + 
$4 S&H: The price of the Ultimate 
Scanner on and after July 1, 1995 will 
be $29.95 + $4 S&H. 

As usual, all my books sold by me will be 
autographed and shipped within 1-3 
days ARO, except that we cannot ship 
the Ultimate Scanner until it’s been 
published. That’s why we’re now 
accepting advance orders for a deep 
discount. Publication date and shipment 
is expected to be in early May, but we’ll 
formally commit to sometime in the 
month of May. 

mtimatt* finar mer Price List 
SPECIAL: Until April 30, 1995: 

$21.95 + $4 S&H 

Until June 30, 1995: $24.95 + $4 S&H 
After June 30, 1995: $29.95 +$4 S&H 
US Funds only, remittance payable to COMMtronics 
Engineering. Canada add US$3 S&H; other foreign 
add enough to cover desired shipping method. 


The next month 
will be a low key 
period, chock full 
of hundreds of 
little details to 
cover. Lots of 
work to do and 
then I’m going to 
sit down for a long 
think about things 
and enjoy a 
peaceful, relaxing 
summer. I will be thinking about new 
directions for both the World Scanner 
Report and my next book. 

I will be meditating upon and 
investigating the future of scanning and 
radio monitoring in general. You see, I 
think we are entering the end of an era. 
I think the curtain of an epoch act is 
coming down as a new “scene” gathers 
momentum to unfold. You deserve to 
know about it, if any such is in the 
works. You’re not likely to hear about it 
in any other forum for the time being, 
and so I will be collecting my thoughts, 
observations, and facts to lay on you in 
the coming months. 

I do not anticipate any monumental, 
earth-shaking revelations, either on the 
technical scene nor out there on the 
monitoring scene for these next few 
months. I foresee a lengthy lull before 
the storm, and I expect this lull to lazily 
wander through our lives for the 
remainder of 1995. 

Am I being cryptic here? I’m sorry, I 
don’t intend to be. It’s just that I have a 
million things on my mind, and about 
90% of them have a potential impact on 
our future. I could be wrong on some; I 
will be right about some; and some will 
probably remain unproved, either way. 
It’s hard to discuss the facts when you’re 

not sine of the difference between fact 
and fiction. That’s my dilemma, but let’s 
consider some facts as we know them: 


1. A host of easily modified, easily re¬ 
engineered scanners hit the market 
between 1980-1994. These scanners are 
earmarked by a maximum of hardware 
and performance with a minimum of 
firmware or software. You remove the 
case of these scanners and stare down 
into a maze of components in such grand 
profusion that even the technical mind is 
easily bewildered at first. 

2. Don’t nail me down on this, but the 
cellular mobile telephone industry was 
conceived in the late 70’s and was a 
viable embryo by 1980, give or take. 

3. By 1986, the cellular telephone 
industry had amassed sufficient power 
and resources to ram through Congress 
the nasty Electronic Communications 
Privacy Act, that forbids monitoring 
cellular phone conversations. 

4. Last year, icing was smeared on the 
cake with passage and implementation of 
the Telephone Disclosure and Dispute 
Resolution Act, Public Law 102-556, of 
1994, a rider of which forbids the 

04/04/95 21:13 -21:13 - Page 1 

importation and manufacture of cellular- 
capable and easily cellular-modified 
receivers, effective 4/1/94. 

5. With rare exception of a few older 
models, all Uniden scanners are basically 
empty boxes with a few chips scattered 
around, controlled by a fat CPU that does 
all the work. ( Firmware ) 

6. Several years ago, Uniden bought 
out Electra-Bearcat and the Regency 
scanner division, and thereby gained 
ownership of a majority of all scanner 
patents. Uniden promptly sued ICOM 
over a patent infringement! 

7. With exception of the new PRO- 
2035 and a current model of the PRO-43, 
all scanners released by the “giants”, 
Uniden and Radio Shack, after 4/1/94 
are your basic CPU-controlled empty 
boxes. The PRO-2035 remains an old, 
but enhanced design with new features, 
most of which are CPU-firmware driven. 
Nice, but the PRO-203 5’s performance 
comes from its PRO-2004/5/6 heritage; 
not from the firmware. 

8. On a slightly offbeat note, take a 
look at the new Uniden BC-9000XLT, 
replacement for the BC-8500XLT. Wow! 
What a whopper! Good grief, you 
believe that, and I have some nice 
Everglades property to sell you. Aw, the 
demed thing isn’t exactly a piece of junk 
though it is within my editorial rights to 
call it whatever I want. But first one of 

you dudes to get one.remove the case 

and tell us what you see inside! Space. 
That’s what will be there. Space...air. 

ED Note: The thing that's wrong with 
this picture is the intentional illusion of 
grandeur & magnificence of the contents 
of these scanners. Space age looks, 
coupled with a seemingly awesome array 
of features and benefits in Uniden's top 
line scanners conveys an impression. 
You are led to believe there is something 
under the hood. You wouldn 7 expect to 
find a Volkswagen Beetle engine under 
the hood of a Peterbilt semi-truck, would 
you? Or .22-cal bullets in a .457 
magnum, eh? Or beer in a bourbon 
bottle? Or rat meat hamburgers down at 
McDuck 's? 

I didn 't mean to editorialize this early in 
the game, but I didn't want to lose 
anyone this early , either. I'm just laying 

out a series of facts with as little 
discussion as possible for the moment. 
People are sometimes offended when I 
render negative opinions on scanners, 
and this is not my intent. Facts and 
brass tacks are my mission for the next 
several months, ok? You can't get mad 
over a fact. Now read on . 

9. As far back as 1986, John Leavens 
of CardKit Electronics was fighting 
Uniden over their “flatpacking” design 
techniques for CB radios, where most 
everything was contained on a chip or 
two. So it's not just me who will tell you 

Uniden radios are hollow .I don’t 

know what became of John and CardKit 
over the years. We drifted out of touch 
when I left the CB scene in ‘87. Anyone 
know if he is still around, or maybe 
wearing concrete overshoes at the bottom 
of Mobile Bay?? 

10. The CE-232 Scanner/Computer 
Interface has not been reviewed by any 
leading hobby radio magazine or 
periodical, even though I asked two! 

11. The CE-232 Scanner/Computer 
Interface was reviewed in two leading 
professional trade magazines without 
being asked (and won a major award in 
one trade rag as the leading Reader 
Service Card draw for that month ).) 

12. A new publisher on the radio scene 
was rudely treated in the Nov-93 issue of 
“Monitoring Times ” in Larry Miller’s 
(What's New column, pg 90) scathing 
book review of Scanners & Secret 
Frequencies by Henry Eisenson.. There 
was no merit in that slam-dunk review, 
especially in light of (13) below. It’s just 
that both the publisher and the author 
were new to the hobby radio scene, and 
were unknowns at the time, apparently 
ripe for a crude and rude initiation rite. 

13. Good oV Boy publishers are never 
rudely treated in the major hobby radio 
magazines, even when their books are a 
downright mess, in which case the 
materials are either not reviewed at all, 
or are glossed over. 

14. Contest Tlmel I I want you guys to dig 
up this next fact, so that I won't have to be 
the one to spill the beans. It's subtle and it's 
slick and if you subscribe to or can get a 
copy of the Mar/Apr 1995 issue of" National 

Scanning Report , then you can WIN a free 
6-mo subscription or extension to your 
subscription to the WSR just for reporting 
the correct answer. We will make the award 
to the first three most correct replies 
received not later than 2400 hrs, April 30, 
1995 via any form of e-mail or US Mail or 
Fax as follows: 






Hertzian BBS 

(619) 578-9247 See masthead 


(6 19) 578-9247 See masthead 

US Mail: 

PO Box 262478 

San Diego, CA92196 

Ok, here’s the deal. The Mar/Apr-’95 issue 
of "National Scanning Report (and a 
number of preceding issues) contains a very 
specific, very unique, singular fact that stands 
out by omission more than visibility. Find & 
report that fact to win. 

Hint 1: Its whats not there. . 

Hint 2: It occurs exactly twice somewhere 
on pp 25-28 of the Mar/Apr-’95 issue of the 
" National Scanning Report 
Hint 3: This fact, while expressly related to 
the Mar/Apr-’95 issue, is not limited to that 
issue, but I don’t know what pages it occurs 
on in other issues, nor in which issues. This 
singularly oddiadi is clearly revealed in the 
Mar/Apr-’95 issue and somewhat subtly so in 
various back issues of the " National 
Scanning Report in the section of the 
magazine that advertises DX Radio Supply's 
publications for sale. 

CHALLENGE: State the fact in so many 
words or less to qualify. Winners and their 
responses will be published in a forthcoming 
issue. Confidentiality is assured for those 
who request it 

Note: Decision of the judge (me) will be 
arbitrary, capricious, and final, but I will 
make the award to at least the first three 
winners, except that an award will be 
made to at least one winner in each of 
the e-mail, fax, BBS, and US Mail 
categories so as to give everyone a 
chance. Therefore, I may award more 
than three winners. How many more is 
up to me. Arbitrary, huh? © 

15. The Information Age is upon us! It 
started in an embryonic form back when 
broadsides, smoke signals, and jungle 
drums were the primary media of 

04/04/95 2i:i3~2i:i3~ The "World Scanner Report" © 1991-95; Volume 5, No 3; Page 2 

communications over distance. The 
Information Age was bom with the 
advent of the locomotive, telegraph, 
telephone, and Pony Express. It entered 
childhood with the invention and 
implementation of radio. And now, 
“Childhood’s End” gives way to 
adolescence as radio becomes a less used 
and less important avenue for 

OK ’ that's enough for now , guys. This 
gives you something to think about for 
the next few months. We'll dig deeper 
and perhaps have an open dialog on 
what the future holds in store. 
Meanwhile , your thoughts, editorials, 
and predictions will make good fodder 
for these pages, so fire away at me, 
either about what I think or about what 
you think. Or both. 


PRQ-2004 Parts Are Gone! 

Last issue, we reported that PRO-2004 
parts might soon dry up at the Tandy 
National Parts center. Might, hell! They 
are gone, so report several of our 
readers. At least the crucial stuff like EL 
panels and maybe the Service Manuals 
are gone. Let us take a moment to shed 
a tear and lament the passing of an era. 

And then, I suppose we could fight! 
First, understand that the PRO-2004 
went off sale back in May, 1990, about 
five years ago. Most manufacturers, and 
Tandy, I think, pretty well commit to 
maintain a spare parts inventory for a 
period of five years after a major item 
leaves the shelves. Tandy more or less 
fulfilled their commitment, shave a 
couple of months. That could be argued 
on technicalities, I suppose. 

So what to do? I dunno. I laid in a 

small supply of the more crucial stuff for 
my PRO-2004 a couple of years ago...EL 
panels, front panels, CPUs, and maybe a 
couple of other things. So I am “fixed” 
for a while. Those of you who would 
like to replace your front panels or the 
degradable EL panel, maybe should call 
Tandy Parts (800) 442-2425, and place 
an order. When you’re told “there ain’t 
no more”, register a protest and ask to 
speak to a supervisor. Plead your case 
and ask WHERE can you get these 

needed parts if Tandy won’t handle them 
anymore. If enough of YOU do that, 
your voice might have some ‘carry’ to it. 

The PRO-2004 isn’t starved for 
electronic parts (generic parts or PRO- 
2005/6 equivalents are fine), so much as 
the things that just wear out....again, EL 
panels, front panels, keyboard panels, 
service manuals, etc. For the most part, I 
think we’re just out of luck. 

There is no hope for damaged front 
panels aside from a dip in solvent; 
polishing, buffing and hand-lettering. 
The EL panels from the PRO-2005/6, 
while a bit smaller than the PRO-2004’s, 
will work. Might not look good, but they 
will provide a backlight for the display. 

Another idea for a replacement backlight 
would be a frosted glass or plastic “slide” 
kind of like a microscope slide, just the 
size of the old EL panel, so it can slip in 
behind the display. Then a series of 
small incandescent “wheat lamps” or 
LEDs could illuminate the slide which 
would diffuse the light enough to make 
the appearance pretty good. Frosted 
glass slides are probably out of the 
question, but what about stiff, translucent 
plastic sheets? Anyone know of a source 
of “frosted plastic”? 

It’s probably unreasonable to ask a 
manufacturer to stock spares for an 
indefinite period, so what are other 
options to prolonging the life of the 
PRO-2004? Anyone have any ideas? 

Meanwhile, let experience be a teacher 
and stock up on critical spares for your 
PRO-2005’s and 2006’s if you know 
what’s good for you. Same with your 
other scanners from yesteryear. If 
they’ve been off sale by three or more 
years, you better either start planning 
your spare parts inventory or peddle the 
dem thing as soon as you can. Words to 
the wise. 

Spare parts planning involves a careful 
analysis of the schematic diagram and 
parts lists, noting the things that are 
generic and those that are unique. In 
general, you need knobs, plastic cases, 
controls, belt clips, and the things that 
can break or wear out. Also spare 
battery holders are a good idea. © 


PRO-2004/5/6 & PRO-2035 


Bandpass filters are a much overlooked 
performance commodity in today’s 
scanners. Pity only a few scanners have 
them. The PRO-2004/5/6, PRO-2035 
and the PRO-43 are among those that do. 
The Uniden BC-8500XLT and BC- 
2500XLT have mediocre excuses for 
bandpass filters, but too bad they don’t 
have better ones and the other things that 
go to making a great receiver. 

So what’s a bandpass filter, anyway? 
Think of it as a switch and a specially 
designed “gate” that admits a band of 
frequencies while rejecting all others. 
Below is a block diagram of the bandpass 
filters used by the PRO-2004/5/6/2035, 
which should clarify the idea: 

Operation of the bandpass filters is 
simple: it’s automatic, done by the CPU, 
that senses the active or selected 
frequency at all times, and makes sure 
the “switch” is set to the proper filter. 
This switching action takes place in a 
few microseconds every time the 
scanner’s frequency is changed, no 
matter the mode: Manual, Scan or 
Search. It doesn’t matter, the mix of 
frequencies, the correct bandpass filter is 
always active within a few millionths of 
a second of the frequency being selected. 

Suppose you are listening to a NOAA 
weather station on 162.550 MHz. The 
above bandpass filter scheme ensures 
that signals no lower than 108 MHz nor 
above 174 MHz can get into the RF Amp 
of the receiver! This serves to minimize 

04/04/95 21:13 - 21:13- The " World Scanner Report " © 1991-95; Volume 5, No 3; Page 3 

or eliminate interference from adjacent 
bands! Only signals within the passband 
of each filter can get through. All others 
will be rejected. Mark that down! 
Bandpass filtering before the front end of 
a receiver is a mark of excellence, found 
only in the better receivers. 

Now let’s take a look at two of these 
bandpass filters. (They all look alike at 
first glance, so two will serve the 
purpose for illustration. See the above 
diagram and refer to your service 
manual for details of the rest.) 


First, let’s take a quick overview of the 
front end, in general. Signals from the 
antenna enter at J-l and immediately 
pass coil L-l, a shunt for DC and static 
buildup on the antenna, but which has no 
effect on RF signals. Next, there are D-l 
and D-2, a series diode safety shunt that 
does nothing unless RF or surges on the 
antenna are strong enough to overcome 
the forward bias levels of the diodes at 
about 0.6v each for 1.2v total. In other 
words, these two diodes will conduct to 
clamp or limit the input of RF and spikes 
to not more than 1.2 volts on to the front 
end. L-l and Dl-2 are safety valves. 

Next the signal encounters L-2, an 
adjustable matching filter, probably to set 
the input impedance of 50Q. If you have 
an S-meter, you can adjust L-2 for 
maximum signal in mid-range of the 
scanner, say around 400-500 MHz. 

Then we come to the Attenuator switch, 
that in one position (0-dB) is a straight- 
thru path into D-3. The -10 dB position 
routes the signal through R-2 to create a 
10 dB loss. 

D-3 is the first diode switch but it’s 
turned ON anytime the scanner is on. I 
suppose it is kind of a safety gate for the 
RF Amp when the scanner is turned off. 

The signal out of D-3 hits a “Y”, one 
direction into D-4 and the other into D9, 
both basically more master switches for 
the bandpass filters. D4 feeds D5, the 
In-Switch for the 760-1300 MHz BP 
filter while D9 feeds the individual diode 
switches for the remaining six BP filters, 
including D10-D12, the In-Switch for 
the 280-520 MHz BP filters. 

Now this is where things get exciting, if 
you’re into BP filters. Note the two BP 
filters shown above that are enclosed 
within dotted boxes for clarity. And 
remember that only one BP filter can be 
on at a time. This is accomplished by 
the heavy gray lines that show the 
switched +5v that turn on and off the 
individual BP In/Out Switch diodes. 
Only one of these gray lines (A or B) will 
be at +5v at any given time. Let’s 
assume that the CPU has placed +5v on 
Line which case there is Ov on 
Line A. Back to Line B, that +5v is fed 
to the two circled resistors, R26 & R29, 
which pass the +5v to the anodes of D12 
and D13, respectively. +5v on the 
anodes of these diodes turns them ON 

allowing a conductive path into and out 
of the filter. Meanwhile, over on Line A, 
there is 0-v on the anodes of D5 and D6, 
which shuts them OFF, thereby 
preventing signals from getting through 
the 760-1300 MHz BPF. 

If you can’t see it, the current path for 
D12 is up from ground through R26 into 
the cathode of D12; out the anode and 
down through R26 & R28 to the +5v 
feed at B. Likewise, the current path for 
D13 is up from ground through R30 into 
the cathode of D13, down through R28 
to the feed at B. I won’t explain any 
more of the diode current paths because 
they’re all the same. Look closely at your 
schematic in the service manual. 

Completing the signal path analysis, a 
signal that enters D12 emerges from the 
filter at D13 with almost no loss 
provided it is between 280-520 MHz. 
Signals outside that range are highly 
attenuated by the filter. The desired 
signal leaves D13 and passes through 
D14, D15, and D8 to pass through C95 
to the base of the RF Amp for further 
processing. The remaining five BPF’s 
all work in the same fashion as described 
here, so the next level of discovery is the 
neat switching method for the bandpass 
filters, the feedlines of which are the 8- 
pin CN-1 (ground & 7 switch lines). 


Following is an illustration of the switch 
function for each pin/line of CN-1: 

As intimated previously, the BPF 
switching signals are originated by the 
CPU, specifically from Pins 42, 43, & 
44, a function called the RF Switch. 
These three output pins form a binary 
number that varies as shown below: 


Stt 1 B’.P.F. 

l G _Brmn — 2 5-40MHz 




PRO-2004/5/6 Shown 
PRO-2035 is similar, 
but hardwired on PCB 

■ 40-68 MHz 
■68-108 MHz 
■108-174 MHz 
• 174-280 MHz 

■ 280-520 MHz 
■760-1300 MHz 
I Ground 

04/04/95 21 : 13 - 21 : 13 -The "WorldScanner Report" © 1991-95; Volume 5, No 3; Page 4 


CPU Pin # 
FREQ RANGE 44 43 42 

25-40 MHz 


L L 

40-68 MHz 


H L 

68-108 MHz 


H L 

108-174 MHz 


L H 

174-280 MHz 


L H 

280-520 MHz 


H H 

760-1300 MHz 


H H 

H= High, +5v 


Low, Ov 

In other words, the CPU outputs logic 
levels on the above pins at all times the 
scanner is turned on. These binary 
numbers have no real use at this stage, 
but are shown and mentioned solely to 
give you the big picture of how the BP 
Filters are switched. 

Pins 42-44 of the CPU feed a neat little 
chip, IC-502 shown below, a basic 
binary-to-decimal converter, where 
things get a little more interesting. 

Neat chip, this one. It accepts up to a 4- 
bit binary input and outputs a decimal 
value equal to 0 thru 9. Referring to the 
BPF Switching Circuit diagram above, 
we see where output Pins 1, 10, & 11 
and Input Pin 12 are not used (no need), 
and where output Pins 2-9 are connected 
to the bases of Q501-507. In the 
example, we see where IC-502 output 
Pin 2 is low and Pins 3-9 are high. This 
is a case where “high” signals do 
nothing, and “lows” do the work. 

You see, Q501-507 are PNP switching 
transistors which cannot conduct until 
their bases are pulled “low”. Case in 
point is the above example for Q501 that 

has a “low” on its base from IC-502, Pin 
2. The bases of Q502-507 are all high. 
The collectors of Q502-507 are all low 
while the collector of Q-501 is “high”. 
The “high” of Q501 goes to the bandpass 
filter for 25-40 MHz through Pin 1 of 
CN-1. Now “highs” do the work. 

This scenario is generated by the outputs 
of CPU Pins 44, 43, and 42, which for 
the example shown above, are high, low, 
low, respectively. This places +5v on 
IC502, Pinl5, and Ov on Pins 14 & 13. 
{Pin 12 is full time low, grounded.) This 
particular combination of inputs causes 
Output Pin 2 of IC502 to go low while 
all others remain “high”. Q501 is 
therefore tinned on, and the 25-40 MHz 
BPF is selected (turned on). 

To cement your understanding of this 
process, I will take you through one more 
scenario. Suppose the scanner is zipping 
along at 26-ch/sec and passes ch-41 
where you have programmed 868.930 
MHz. As the scanner scans, its CPU 
oversees the operation, inserting 
programmed freqs into the display and 
tuning the scanner to receive that ffeq. 
In this case of 868.930 MHz, the CPU 
presents high-high-high at its Pins 44, 
43, & 42, respectively, for three “highs” 
fed to IC502, Pins 15, 14, & 13, 
respectively. IC502 “sees” a binary “7”, 
and drops output Pin 7 to a low state, 
where the low is fed to Q507’s base to 
drive its output “high” and thereby turn 
on the 760-1300 MHz Bandpass Filter. 
At the same time, no other outputs of 
IC502 go low, so the other six switching 

transistors, Q501-506 remain turned off. 
Only one BPF can be turned on at a time. 
In conclusion, all this switching action is 
very fast, taking place at least 26 times 
per second, whether or not any RF 
signals are present and whether or not 
the scanner actually stops. This is a 
function controlled exclusively by the 
CPU, IC502, and Q501-506. 

Now a word on Q501-507, specially 
designed switching transistors with built- 
in bias resistors. You will see a lot of 
this type of transistor used in the PRO- 
2004/5/6, PRO-2035, PRO-43 and other 
modem scanners. These transistors are 
designed for economy and for high speed 
switching. There is nothing weird about 
them, however. 

You will notice that IC-502 is powered 
by +5v at Pin 16, and yet has +8v logic 
(7.4v) on its output pins. Fortunately, 
IC-502 is one of those chips that can 
function with different logic states 
between input and output, however, 
those +7.4v outputs do not come from 
IC-502. Note above where +8.2v is fed 
to the emitters of Q501-507 via R501. 
Note the internal construction of Q501- 
507 where there is a built-in emitter-base 
resistor and a base resistor, thereby- 
offering an internal path from the 
scanner’s +8v supply to the output pins 
of IC-502. The logic output of IC502 is 
LOW-based, so when its output pins are 
not internally driven low, the pins are 
free to float to whatever may be sent to 
them externally, in this case 8-volts, less 
the resistor drops. Questions? © 

04/04/95 21 : 13 — 2i:i3~ The "WorldScanner Report" © 1991-95; Volume 5, No 3; Page 5 


I was impressed with last year’s Radio 
Shack Multimeter with PC-Interface, 
#22-182, but when I saw the new, #22- 
168 version for 1995, I just had to get 
one.. Both meters feature frequency 
counter, capacitor tester, and an interface 
for a personal computer in addition to all 
the regular multimeter functions! I liked 
last year’s so well that my daughter and I 
each have one. 

Radio Shack’s new 1995 model offers 
several improvements over the 1994 
version, including 20 MHz Frequency 
counter and a dual displays. 

And WOW! Most impressive is the new 
ScopeView software that comes with this 
year’s meter! It does graphing, data 
acquisition & logging, and makes using 
the meter much easier and a lot of fun! 

I read one of the text files that came with 
the new meter and saw a company name 
and address at the head of the file. No, 
not Radio Shack! Rather, the authors of 
tlie new ScopeView program that comes 
with the 1995 meter. The program was 
such an improvement over last year’s 
that I just had to write a note of thanks, 
appreciation and congratulations. 

AG A Associates 
PO Box 99573 
Seattle, WA 98199-0573 
FAX (206) 217-9138 

I received an immediate response and an 
opportunity to get to know that company 
a little better. I learned that the Radio 
Shack PC Interface meters are made by a 
Korean manufacturer named Metex, 
already known for quality in parts of the 
world. Metex contracts AGA Associates 
to produce the “ScopeVie w” program for 
the Radio Shack meters and for the 
Metex meter line. AGA Associates is 
also a distributor for Metex. One thing 
led to another, until I became the proud 
owner of their Metex M-3850, a much 
more powerful relative of Radio Shack’s 
1995 PC Interface Meter. 

The M-3850 offers a 40-MHz frequency 
counter, auto-ranging, backlighted LCD 
display, 3 3 / 4 digit main display, two 
thermocouple temperature functions, the 
external Type K measures from -40°C to 

+1200°C. The M-3850 otherwise closely 
resembles the Radio Shack #22-168, on 
which you can get the rest of the specs 
for this fine meter from the 1995 RS 
catalog, pg 118. Contact AGA Associates 

for more info on their advanced Metex 
meters. Radio Shack’s 22-168 is 

$129.95. The Metex M-3850 is a 
bargain at $179.95, but read on. 

Secondary display! 

Allows display of two 
different parameters, 
at the same time! 

_ Toool 


1. Power Button 

2. Function Button 

3. Set/Reset Button 

4. DC&ft/AC & Sound 

5. Up Button 

6. Down Button 

7. Back-Light Button 

8. Transistor Socket 

9. Capacitor/Temp 

10. Rotary Switch 

11. 20 A Terminal 

12. mA Terminal 

13. COM Terminal 

14. V/Q Terminal 

15. LCD (3-3/4 digit) 

16. Analog Bargraph 

17. Bargraph Scale 

18. Overload Indication 

19. Auto-Hold 

20. Data-Hold 

21. Minimum 

ScopeView Output 

22. Maximum 

23. Relative 

24. Memory 

25. Memory Recall 

26. Range-Hold 

27. Dual Display 

28. Communication 

29. Comparison 

30. Address No. Socket 

31. Diode Test 

32. AC Current/ voltage 

33. Continuity Test 

34. Negative polarity 

35. Frequency 

36. Temperature 

37. Capacitance 

38. Transistor hFE 

39. Logic Test 

40. Sub-display 

41. Low Battery 
42 Annunciators 

'9 20 21 72 M 30 


11 nil - 


'.7B - 




‘ 36 - 

| 38- 

O O O 44 ’ 

: :S U.U.U.U s' 

-.CM> O lO M T, 


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04/04/952i:i3~2i:i3~ The "World Scanner Report" © 1991-95; Volume 5, No 3; Page 6 

Shown in the illustration on the 
preceding page are the functions and 
controls of the Metex M-3850, and a 
couple of views of the ScopeView 
software user interface, one of which is a 
large meter readout for the monitor and 
the other, a graphical chart of 
measurements made over time which can 
be printed or saved to a file! The 
example of the chart output shows the 
thermocouple temperature measurements 
I made every few seconds with ice water, 
ambient air and body warmth. The 
horizontal scale is 30-sec per division for 
a span of 8-mins as shown. The vertical 
scale goes from -5°C to +35°C in 5° 
increments. The parameters and scales 
as seen in the illustration are variable 
and configurable according to user 
requirements. You can plot and chart a 
wide range of voltage, resistance, 
current, and temperature measurements 
over an equally wide span of time. 

Radio Shack’s digital multimeter with 
PC Interface, #22-168, pg 118, 1995 
Catalog, (# 22-182 was the 1994 model) 
comes with AGA Associates’ ScopeView 
software, just like the Metex M-3850. In 
fact, the three meters are mutually 
compatible with all versions of the 
software! I don’t know how or if you can 
get the upgrade ScopeView program for 
the older meter, but a call to AGA 
Associates and/or Radio Shack might be 
productive! Best of all, these hot PC 
Interface multimeters can be operated as 
automated data loggers with a simple 
connection to any IBM/PC compatible 
computer, from an XT/AT through the 
ultramodern Pentium90. The ScopeView 
program that comes with the 1995 RS 
meter and the Metex meters is strictly 
for Windows but also included is a close 
equivalent for MS-DOS, so if you don’t 
use Windows, you’re not left out in the 
cold whatsoever. 

A multimeter is a multimeter, but Radio 
Shack’s #22-168 ( and 22-182) and the 
Metex M-3850 are so much more 
because they can easily be connected to 
communicate with and be controlled by a 
personal computer. In fact, these meters 
come with the necessary cables to fit the 
common serial port of most IBM/PC- 
compatible computers ever made. Also 
included is the necessary software to 
weld computer and meter into a very 
powerful data acquisition system that’s 

capable of automatically measuring and 
logging voltage, resistance, current, 
capacitance, frequency, and even the 
gain of bipolar transistors! The 
computer writes to a simple ASCII text 
file whatever data at whatever 
measurement interval you choose, for a 
permanent record of “events”, qualities 
or quantities that might be represented 
by the measured parameters. 

For example, the Radio Shack and Metex 
meters can be connected to the Squelch 
circuit of a receiver to produce a log-style 
record of Squelch breaks that might later 
be synchronized to a simultaneous tape 
recording while you’ve been away. You 
could use the A/C voltage function to 
produce a 24-lir log of line voltage 
measurements to show how the power 
company isn’t treating you right. A 
cadmium-sulfide cell (276-1657) 
connected the ohmmeter can be used to 
record variations of light, either sunlight 
through the course of day and night or as 
a detector for movement-triggered flood 
lights at night. (/ see the heart and soul 
of a sophisticated security system here, 
don’t you?) A thermistor connected to 
the ohmmeter can be a temperature 
sensor. The bench technician 
troubleshooting an intermittent voltage 
variation in a power supply or other 
circuit can connect these meters for 
unattended recordings of desired voltages 
while he busies himself with other 
productive work. If there is a periodicity 
to the voltage fluctuations, this could be 
a clue to the necessary remedial 

In short, the RS and Metex meters can be 
connected to most any kind of sensor, 
transducer, detector, or other signal 
source, to serve as a hands-off, automatic 
data recorder or datalogger. The 
applications are limited only by the 
imagination! Think of it this way, 
whatever you would do with a voltmeter, 
ammeter, milliammeter, ohmmeter, 
capacitor meter, and/or frequency 
counter can now be controlled by a low 
cost computer that might otherwise ready 
for the junkyard. Accumulated data is 
written to the ASCII text file and saved 
on the hard disk or floppy disk. 

You might ask what can later be done 
with the text file of data. Process it, of 
course! An ASCII text file is easily 

reformatted into a type of file suited for 
exporting into a database manager 
program such as dBase III, IV, Microsoft 
ACCESS, FoxPro, Approach, Paradox, 
FileExpress, PC-File, Q&A, or any of the 
many others. The best universal format 
for export to most all database managers 
is a comma-delimited ASCII text fde. 
Database managers make quick work of 
data processing for human evaluation 
and interpretation of the results. 

The aforementioned comma-delimited 
ASCII text file is not produced by the 
programs that come with Radio Shack’s 
and Metex PC-Interface Meters, but 
their output textfiles can be manually 
reprocessed to make a comma delimited 
file with a text editor of choice (/ like 
QEDIT). If you’re I am....and 
want it all, you are welcome to download 
from my Hertzian Intercept BBS a 
revised version of the 1994 meter 
program that will generate the comma 
delimited file, hands off! My dear friend 
and associate, Brian Greer of Los 
Angeles, did the necessary revisions to 
the open source code and made it freely 
available. The revised meter logger 
program works with either RS meter and 
AGA Associates Metex meters. This 
revised PC-Interface control program is 
named RSMETER.ZIP (about 50-kb) 
and is available in the free file section of 
the Hertzian Intercept BBS. 
RSMETER.ZIP also contains an icon, a 
PIF file and a batch file to facilitate 
running the data logging program from 
Windows™. Of course, it’s a natural to 
run from MS-DOS as well. 

Radio Shack’s newest 22-168 and the 
Metex meters come with the previously 
described fantastic Windows™ 
ScopeView datalogging and scope 
program that beats anything I’ve ever 
seen for ten times the cost. Utterly 
awesome is that this program is 
backwards compatible with RS’s older 
22-182 meter, too! Now let’s polish off 
with some real world applications for a 
datalogger in your shop or shack. 

How about a propagation analyzer? You 
can get propagation charts from 
Monitoring Times and other shortwave 
literature, but are they accurate? Weft- 

yes.if everything meets the spec under 

which the charts were produced, but who 
can control the weather and other 

04/04&5 2 i:i3~2i:i3~ The "WorldScanner Report" © 1991-95; Volume 5, No 3; Page 1 

variables from one locale to the next? 
You might want to do your own 
propagation studies. Easy with these PC- 
Interface meters. Just connect the meter 
to the shortwave receiver’s S-meter 
circuit. Tune the receiver to a world class 
station on a frequency of interest. Turn 
the volume down so you’re not bothered 
by the noise. Then set up the Interface 
program to log S-Meter data at periodic 
intervals, say once or twice a minute. 
Ensure things are working, and then go 
on about your business for the next 24 to 
72 hours. When you return, you’ll find a 
massive data file awaiting your most 
exacting or cursory analysis. 

How about a channel traffic analysis? 
Sure, connect the meter to a scanner’s 
SQuelch Gate, and set the display for a 
VHF-UHF frequency of interest. Run the 

program.and come back 24-72 hours 

later to find a great database that can be 
assessed for traffic volume and density. 

If you take this business of datalogging 
and data processing seriously, the output 
file of these meters can be dropped into a 
spreadsheet with a Y = mX + b equation 
to convert raw data into meaningful 
information. If you don’t know what I 
mean, relax....Metex’ and Radio Shack’s 
PC-Interface Meters still offer boatloads 
of opportunity for personal enrichment to 
the greenest neophyte as well as the 
saltiest expert. Once you get started, 
you’ll find yourself cruising a long 
hallway of progress with one door after 
another opening for you. The smallest 
tilings sometimes lead us to the greatest 
crossroads of Life. Thirty-seven years 
ago, I got a newfangled transistor radio 
for my 12th birthday. It changed my 
Life. I gave my daughter one of these PC 
Interface meters for her 16th birthday 
last year. Q 


From: John Huston, Harrisonville, MO 

Do you have any comments about the PRO- 
2006 running 24 hours per day? 

ED: Well, most of my scanners see 24-hours 
per day operation, day in and day out, for 
years. The primary consideration is for how 
much heat builds up. If appreciable, then 
external DC should run the radios. We’ve 
discussed this before, remember? 

Number of Subscribers in A/C 815? 
From: Paul Alpisen Loves Park, IL I’m 

curious as to how many subscribers you have 
in the Loves Park/Rockford, IL area. 

ED: We show six in Area Code 815 

PRQ-2004 Parts Are Gone! Help! 
From: Thomas Pamin. Erie PA: Regarding 
your article on parts for the PRO-2004, Radio 
Shack does not have the electroluminescent 
panels under either of the part #’s you 
mentioned. Do you have any extra ones I 
might be able to buy from you? I could use 
about six, since I have three PRO-2004’s. 
Please let me know if you do and what the 
price would be. If you don’t have any, do you 
know any other place I could get one? 

ED: Try an RS Service Center? See the 
relevant article in this issue. I’m afraid 
we ’re out of luck, at least for the short term. 
I have a very small supply sufficient to meet 
my personal needs for the near future, but 
none for public consumption. I think your 
best bet is to lodge a protest with a 
supervisor at Tandy’s National Parts Center 
(800) 442-2425, and then work your way up 
through the Radio Shack hierarchy into the 
Headshed, if necessary. There IS a certain 
liability on their part, I feel, despite the fact 
that five years have lapsed since the PRO- 
2004 went off sale. They should never have 
designed their scanners with materials known 
to wear out, and then not stock those parts. 
Then there is the matter of QA problems with 
the PRO-2004 early in its production cycle. 
Hundreds or thousands of defective or 
potentially defective PRO-2004’s were 
released to the public in 1987-88. We may be 
dealing with a case of “planned 
obsolescence ’’ here, on which you could 
make a solid case if you hollered loud and 
long enough. Radio Shack has plenty of 
(800) numbers to minimize costs. 

From: Ed Vaughan, Wichita, KS: I saw 
your article by Greg Strauss, in V5N2 about 
the battery replacement for the BC- 
100XLT/200XLT. After SV7 years, my two 
battery packs on my BC-200XLT finally bit 
the dust. I also checked for the Sanyo 
replacement battery packs with no luck. 
Even from Uniden, the only solution was to 
buy the whole battery pack. 

I ran across a company that sells the battery 
pack-inserts. They are already shrink 
wrapped together. All you have to do is 
solder the red and black wires to the new 
pack and put the case back together again. 
Whole process took about 10-mins for both 
packs. The rating is the same-60mA/h. Cost 
was $15.00 ea plus shipping (about $4.00). I 
used my plastic, and they arrived in five days. 

They offer a higher rated pack, but I wasn’t 
sure if the charger would handle it. 

Item code: BP200/205I 
Descr: Uniden/Bearcat BP 200/205 7.2V 
600mA/h NiCd Battery Insert 
Price: $15.00 each 
E. H. Yost & Co. 

7344 Tetiva Road 
Sauk City, WI 53583 
Voice: 608-643-3194 
Fax: 608-643-4439 

ED: Great info, Ed! Thanks! Good move on 
the higher rated packs. Rechargers must be 
designed for the capacity of the pack. 

From: Don Alesch. Jr. Menasha, WI: Hey 

Bill, It’s me again...hide the women & kids, 
grab a stuff drink and let’s go...I have a 
suggestion for your “ elementary ” circuit 
analysis features. First, for this one I’m 
going to ask you to use “layman’s terms”. 
Usually, with a little research I can figure out 
what you’re talking about. But sometimes 
you go way over my head. I have no formal, 
or for that matter practical, education in 
electronics. Either it works or it don’t! 

ED: Good point.... maybe. There is a limit 
as to how elementary I can get and still get 
the point across without taking the full 8-10 
pages to nail it down. I think it would be a 
good idea for the future if people would 
question me on specifics of what is not 
understood so that I can either clarify my 
language or refer the hacker to resources. 

How does one find specific areas in the 
service manuals and in the units that we may 
want to modify? Specifically, unlocking 
blocked frequencies. What do you look for 
and how do you identify such areas? 

ED: Good question. In most cases, the 
novice can’t identify those areas on his own. 
The purpose of a service manual for the 
hacker is not so he can do original research 
& development on his own, though if he can, 
more power to *im. Rather, it is as a road 
map so we can play to the same sheet of 

music when I give out tech info . I can do it 

in fewer words if we 're both looking at the 
same diagram. In due time, the hacker will 
learn and master a lot of this stuff. I’ll do a 
tech article on this subject soon, though. 

As far as unmodifiable equipment, just what 
makes them unmodifiable?! How can one 
tell? I mean, why can’t we just find the right 
area and fix this factoiy/govemment flaw. 
Even to the point of changing a CPU, (is that 
possible, why - why not?). I mean, a Scanner 
Wizard like yourself should have come up 
with a way to correct this situation by now! 

You have mentioned the terms firmware and 
hardware. What in the world are we talking 
about here? And why can’t we change or 
upgrade them?__ 

04/04/9521:13-21:13- The "World Scanner Report" © 1991-95; Volume 5, No 3; Page 8 

ED: More good questions. Scanner CPU’s 
are really microcomputers, self-contained 
with everything they need to run alone, 
including volatile and non-volatile memory 
(RAM and ROM), an “operating system ”, 
etc. The CPU chips are manufactured with 
“open doors” so to speak. Manufacturers 
buy them; load their own unique code; then 
literally weld or bum the “doorway” closed 
so that it cannot be accessed. In general 
terms, this internal, inaccessible program 
code is called firmware. 

You can remove and replace a CPU so long 
as it is pin-for-pin compatible with the 
original and so long as it does things within 
the capabilities of the hardware that’s 
external to the CPU. If you were a 
programmer and knew how to set up a CPU 
to control a scanner, you could buy an open 
CPU and “bum ” it with your own code, and 
within limits of reason, make the scanner do 
whatever you want it to do. This is more or 
less the principle of the Optoelectronics 456 
Interface. It replaces the scanner’s CPU to a 
limited extent. 

You can ’t always tell at a glance if a scanner 
is “unmodifiable”. That may take some 
experience and knowledge of the technology. 
The neophyte will pretty well have to go by 
what the experts say until he passes the green 
stages of hacking. In my case, I am a 
hardware engineer; not a software expert. 
About all I know of programming is that it 

appears on radio and TV. . But I can 

look at a CPU circuit and tell within minutes 
something of its capability. All new scanners 
are unmodifiable in the CPU area. Period. 

On a related matter...I’ve seen adds for the 
AOR8000 megascanner. The ad states that 
you can get a blocked unit, or, if you’re a 
government agent, an unblocked one. What 
gives?! Why can’t a person get a copy of the 

service manual for both versions, find the 
difference, order the parts, and correct the 

ED: Maybe that is possible! More than 
likely, it is a matter of replacing an entire 
CPU/Logic board with another one; usually 
a fairly easy task. But to determine this 
requires research and development, a very 
expensive proposition. So far, no one has 
donated an AR-8000 for my research, and I 
am not about to buy one on a lark & gamble. 

Likewise with the Bearcat 2500XLT, 
(Remember Uniden/Bearcat... one of your 
favorite Mfg’s.), now they have a 3000XLT 
model out. they look almost identical, but 
advertise added bells and whistles. Again, 
check the differences in the service manuals, 
(if I knew where to look [again - in layman’s 
terms please]), and improve on mother 
nature! After all we are talking about a 
“machine” here. Not the twisted ramblings 
going on in the mind of a guy named Don 
from Menasha! 

ED: True enough, but again, we ’re talking 
exhaustive research and analytical efforts. 
The service manual is requisite to success of 
such efforts, is having the equipment 
in hand with which to perform tests and 
checks. No one has donated a BC-2500XLT 
or BC-3000XLT to my research. And I am 
not about to buy firmware .. 

Now a short note of thanks to Greg Strauss, 
V5N2P6. The battery upgrade works great! 
Although the fine fellows at the local R.S. 
gave me a bewildered, almost confused look, 
when I tried to explain why I wanted two sets 
of cordless phone batteries! The hired help 
still believe that R-58 cable is the best for 
scanner applications...come on guys...haven’t 
you ever heard of “Dr. Rigormortis”\7 
ED: It’s a Cosmic Principle to take with a 
grain of salt whatever RS people tell you. 

Well Bill, that’s about it for now. Eventually 
you may get to a point where you’ll get 
yourself a rubber stamp stating “RETURN 
TO SENDER”, to use when my letters show 
in your mail!! So, sober up, let the wife and 
kids back out, and go back to that tremendous 
job you do so well! Hugs & Kisses, 

ED: Let’s dispense with the H&K’s. Cindy 
and daughter Ali keep me well stocked in that 
department. Sober? I used to drink like a 
fish, but I’ve been sober for five years, ever 
since I slithered down the stairs headfirst on 
a Japanese sake ' bender while the kids were 
looking on, wondering why *ol Dad was 
acting so weird. As for letting wife & kids 
out? THEY filter all my mail before I ever 
see it, so Life is easy for me . 

P.S. Regarding that full and complete copy 
of the BC2500XLT Service Manual I sent 
you, V5N2P7, I had that professionally 
reproduced at a local printer, hi many ways 
it was better than the original! And it 
weren’t cheap! 

ED: I expect not, but it still ain’t here. © 

From: Michael Stams, Seattle WA: Just a 
quick note to fill you in on Caller Number 
Identification (CNID) or Caller-ID. Enclosed 
is a copy of the CNID Frequently-Asked- 
Questions (FAQ) from the telecom archives 
on The entire posting makes 
for interesting reading but section 4 is of 
interest. It details how the CNID data is 

It is important to note that CNID is not the 
same as Automatic Number Identification 
(ANI) used by E911 services and 800/900 
number providers. ANI cannot be blocked. 
The answer to the reader question “Is caller 
I.D. data transmitted by the base of a cordless 
phone?” is No. The cordless handset ring is 

04 / 04/95 21.13 - 2i:i3~ The " World Scanner Report" © 1991-95; Volume 5, No 3; Page 9 

Sub&eriherNo, graft&9S SUBSCRlPttdM SLA M V5M03 

|USA RATES shown: Canada add 15%; Other Foreign +25%-surf/+50%-Air 


fiACK &SUgS flteLY mm**QPY <** * *m$ 





1991 (1st Year, Jan-Nov/Dec)~ 

1992 (2nd Year, Jan-Nov/Dec)- 

1993 (3rd Year, Jan-Nov/Dec)- 

1994 (4th Year, Jan-Nov/Dec)- 

-10 ea $20.00 
-10 ea $21.00 
-10 ea $23.00 
-10 ea $25.00 

Work Ph: (. 
Home Ph:(, 

Career or 

1991-94 (All the above)- 

-40 ea $79.00 j$ 


& Other Radios » 

METHOD OF Check Cash M.O. Visa MstCard COD (+$6.50) 
PAYMENT » □ □ □ □ □ _ 

Amount Enclosed 

Half Year 
One Year 
Two Years 

5ea $15.00 
10 ea $25.00 
20 ea $45.00 

1 mum products. 

Credit Card 
Acct No: » 

Amount Charged 

Name of 

Issuina Bank 



/ I 

Signature Required (for credit card purchases) 


■■■■I I 


What else to tell us? 


L JHHi: 

Scanner Mod Hndbk, Vol-1: $17.95 + $4.00 S&H * 
Scanner Mod Hndbk, Vol-2: $17.95 + $4.00 S&H * 
Scanners & Secret Frequencies $19.95 + $4 S&H * 

* Canada US$6 S&H; Other Foreign US$9 S&H; aH add extra for Air 
|CE-232 Interface Kit $194.95 + $5 S4H; All Foreign add 25%-surf 
Hertzian Intercept BBS Subs: $8/mo $15/3-mo $25/6-mo $40/yr $75/2-yr 
Calif residents: Saiaa Tax - 7.0% on all ordera except WSR eube 

synthesized by the base unit in a fashion 
similar to all modem phones. 

I am sorry CNID is not available in CA, but 
remember, one person’s right is another 
person’s invasion of privacy, the good of the 
many outweigh the good of the few. 

ED: I have this to say about that.....when 
two rights are in apparent conflict, one must 
give way to the greater good or the higher 
right. Specifically, if we assume that callers 
and callee’s have a right to privacy, then 
whose is the greater right? It is far easier 
for the caller to choose NOT to make a call 
than it is for the callee to choose NOT to 
accept a call. The caller has the instant right 
to his choice while the callee must weigh and 
deliberate first to exercise his. But the callee 
has no data on which to base his choice, 
when the phone rings. 

On the other hand, the caller KNOWS whom 
he is calling; the callee has no clue who is 
calling. This is an unequal situation. 
Therefore, CALLER-ID performs as an 
equalizer without impinging on any inherent 
rights of the caller. If a caller wishes to be 
anonymous, CALLER-ID can reflect that, 
too, thereby giving the callee at least 
something in the way of equal information. 
CALLER-ID cannot in any way impinge on 
the rights of the caller. Callers DO, 
however, impinge on the rights of callees. 
CALLER-ID could go a long way to 
equalizing everyone *s rights . I think. 

That Frequently Asked Questions file you 
mentioned is a good one, so I got on the 
Internet and ftp'd it and put it up for free 
access on my BBS, the Hertzian Intercept. 
The following file is available in the free 
download area of the BBS: 

CIDFAQ.TXT 14772 03/16/1995 12:31 


I have no idea of where this came from, but 
cellular can be restored in the PRO-2027: 

Remove bottom panel ( 4 screws ). Locate 
diode D35 located behind the <Enter> key. 
It’s a surface mount component that 
resembles a tiny black rectangle. Desolder 
and remove D35. Gently pry up the 
component with a pin or tweezers while 
touching one leg with a soldering iron. Don't 
apply too much heat for very long at a time. 


Tim Dowdle of Chula Vista, CA, called to 
tell us Marymac Industries of Katy, TX, is 
gone! The franchise store apparently was 
sold back to Radio Shack. Dowdle advised 
that Ft Worth Computers, another Radio 
Shack franchise store, (800-433-7283), is a 
good alternate source for deep discounts on 
the better PRO-line scanners. Ask for Steve. 

From: Melvin Morris, Rison, AR: You 
asked for ideas from readers of your books. 

I use my PRO-43 for a base unit. (I am trying 
to sneak up on a PRO-2004/5/6), but, that 
may never take place. When I get 3 feet 
away from the PRO-43 I can’t tell if it’s on or 
off; when there is no activity. It needs a 
small LED on the front. Second and most 
important is, in the middle of a SEARCH, the 
scanner can stop on a carrier, or hit the 
control channel of a trunked system. Why 
can’t there be a circuit to lockout these 
unwanted frequencies and still search that 
band of frequencies. You can lock them out 
on SCAN, but not on SEARCH. 

I may be wading into deep water, but can the 
average person build a converter to 

reincarnate a scanner that just has the 400- 
500 MHz to 800 MHz? I know they make 
them, but probably hard to come by now. 

I have both your books and congratulate you 
on them. I’m looking forward to your 3rd 
book when you get enough material to 
publish it. I’m scared that I won’t know 
anything about it for 10 years; and by then 
you will be sold out. I said that for a joke but 
it really is the truth. Here in Arkansas we are 
about that far behind Calif. 

ED: So long as you understand that an LED 
draws current and handheld scanners run 
from batteries that drain at the least 
opportune moment, then you can wire in an 
LED pretty much where ever you want it. 
First find a place for it, preferably a T-I size 
or smaller, and prewire it with two color 
coded wires, one for the cathode and one for 
the anode. Install the LED and bind it with 
superglue or hot glue. Route the wires up to 
near the ON/OFF switch. Solder the cathode 
wire to a nearby ground. Solder a I500C2 
resistor to the switched side of the ON/OFF 
switch. Solder the LED anode wire to the 
free end of the resistor. Draws 5-ma or so. 

There isn’t any good way to logically sense 
and lockout selected freqs found in SEARCH 
mode of the PRO-43. It can be easily done 
with the CE-232 Interface and a PRO- 
2004/5/6, but not others. Technical reasons. 

Bad news on converters, but a little research 
in ham literature might be productive for a 
roll-your-own. Not easy for the beginner. 
Commercial models are illegal to sell now. 

See the front page for news of my 3rd book, 
the Ultimate Scanner. You're up with the 
times now. Arkansas ain't so bad after all! © 
That’s it for this month, folks. Next issue 
should release in early May. Spring is here! 

04/<MS952i:i3~2i:i3~ The "World Scanner Report" © 1991-95; Volume 5, No 3; Page 10 


PO BOX 262478 
m DIEGO, CA 92106-2478 




+ Ultimate Scanner (Book) Announced ~ Facts & Fantasies for 1995 & Beyond 
+ Contest Time: Enter & Win! ~ UPDATE: PRO-2004 Parts Are Gone! 

+ PRO-2004/5/6/2035 Bandpass Filters Explained ~ Bandpass Switch Circuits 
+ Hot Stuff For Hackers: PC Interface Multimeters from Radio Shack and Metex! 
+ New company: AGA Associates 

+ Run a scanner 24-hrs/day? ~ BC-100XLT/BC-200XLT Battery Source 
+ Layman & Neophyte Hacker Concerns ~ Caller-ID Information 
+ PRO-2027 Cellular Restoration ~ Marymac Industries Gone! 

+ Stocking up on parts ~ Electroluminescent Panel Considerations 
+ PRO-43 Impossible Tricks & Mods ~ 800 MHz Converters Now Illegal