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Publisher/Editor; H. D. Cheek, Sr. aka 'Dr. Riqornortis' V1N1 : January, 1991 

Rev-f: 7-zs-?/ 

A Journal of VHF-UHF Scanner Technology t Engineering 

Published at; CQMMtronics Engineering; PQ BOX 262478; San Diego, CA 92196 Copyright (c) 1991 <A11 Rights Reserved) $4,80 


Helcome to the first of what I hope will be a long history of 
technical publications dedicated to scanners and scanning. All 
indications are that this will be. The scanner market is growing 
at an exponential rate in many world markets. Scanner technology 
has literally shot through the roof since 1986 with the entry of 
the Realistic™ PRO-2884 and more recently, the PRO-2085 and 
PRO-2806. Scanners from AOR, distributed by ACE Coaaunications, 
including the AR-3008, AR-2515 and the AR-1088, are right on the 
leading edge of technology. Uniden/Bearcat/Regency seems to lag a 
little, but their MR-8188 and BC-288/285XLT are top notch. 

Then there are ICOM's R-9838, R-7808, R-l and R-180; Kenwood's 
R2-1; Sony's ICF-PR088; and Yaesu's FRG-9600, none of which truly 
belong in what I call the "scanner class" but I won't discriminate 
here! A number of potentially great scanners circulate around the 
European scene that haven't yet come to the USA. These include 
Yupiteru (Jupiter), Fairmate and Black Jaguar, all of which sport 
some interesting features and high technology. 

The Hobby Radio scene has experienced an explosive growth of high 
technology, but we hobbyists are always at the mercy of what the 
sfgrs offer. This wasn't so bad some years ago when there wasn't 
much to offer and when the market demanded very little in the way 
of sophistication and performance. Today, the technology lies 
within our grasp, thanks to Large Scale Integration (LSI) and 
digital techniques. But the manufacturers give us only a fraction 
of that technology so far! In some scanners, a greater technology 
already exists, lightly buried, just waiting to be exploited, 
probed and liberated; yes, freed. In these and other scanners, 
the addition of a few parts or a small circuit can liberate or 
augment a deeper layer of that technology. 

Of course, we will graciously accept what the afgrs offer us; but 
then we'll roll up our sleeves; heat up the soldering irons and 
get down to liberating or adding to that technology. Thanks to a 
non-critical, hobbyist oriented digital technology and thanks to a 
highly developed RF/analog technology, we can jog down to the 
corner Radio Shack store for $10 worth of parts and by nightfall, 
have added $188-$208 to the intrinsic value of a scanner! He will 
do for ourselves at a reasonable cost what maybe the mfgrs cannot 
yet do. The 'MOULD SCAMMER REPORT " will work to place that high 
technology in your hands so that you can be free to explore the 
exciting world of radio communications to the fullest extent. 


The 'MORLD SCAMMER REPORT ' actively seeks monthly columnists, 
occasional contributors and Reader Comments/Questions. Monthly 
columnists may qualify for free subscriptions. Other perks and 
benefits may be available to enhance the columnist's career and/or 
hobby interests. Inquire if you're interested in an adventure! 

The 'MORLD SCAMMER REPORT ' welcomes and encourages YOU to 
participate in its production. I do not pretend to be the sole 
authority or expert on the latest technology. One of my strong 
suits is that of "facilitator" or "conveyor" of information. My 
38+ years of engineering experience counts for a lot, but there 
are RF fc digital "gurus" out there who could make me look more 
like a laborer than an engineer, and I am not kidding! This is to 
say that YOUR input is needed, be it a mere question or the plans 
for an exciting new modification. Questions generate answers, you 
see, and answers are what we all want. Your questions force me to 
look up the answers and HE BOTH learn something as a result. If 
you have anything to contribute, however slight, be it a question 
or a series of technical articles, please feel invited to write. 
All Reader Input will be respected and seriously considered! 
Questions may be answered here in the 'MORLD SCAMMER REPORT' or by 
return sail. See below. 

IF YOU HANT A PERSONAL REPLY to a question or problem, you MUST 
include a self-addressed, stamped , business-sized envelope AND one 
loose, extra postage stamp (SASE+1) with your inquiry. Expense of 
reply is prohibitive without this cost-defrayal courtesy. 
Business inquiries are exempt from this mandate, but an extra 
stamp or two will always be appreciated. I would like to answer 
most questions here in the ' MSR ' to economize on time consuming 
personal replies and to make the answers available to others, as 
well. He're not like the larger, slick magazines where there's a 
three month delay. At the most, we'll be maybe a month behind, 
and usually less than that! Deadlines for publication are 
flexible and are 1-2 weeks before the 1st of each month. 

of my business, COMMtronics Engineering. I am fortunate that my 
business is also my pleasure. The 'MORLD SCAMMER REPORT ' is an 
expression of my hobby pursuits, but it mingles with business 
interests to an extent that cannot be helped. Time was when I 
went overboard to keep pleasure from mixing with business. Talk 
about the Impossible Dream! Older and smarter now, I'm just 
letting you know the score so you can judge for yourself the 
merits or demerits of what I am doing here. 

I will always give you as many sides of an issue, project or topic 
so that you can sake an intelligent decision on how to proceed. I 
will not parcel out spoonfuls of information for the purpose of 
creating business opportunities. You will receive ALL and as MUCH 
detailed information as can be given within the space available. 
If you judge a matter to be beyond your capability and want me to 
handle it for you, perhaps that can be arranged. On the other 
hand, the information given will be good enough for most hobbyists 
to take the ball and run to success! In cases where you aren't 
successful with a venture, I am always available by mail for 
consultation to guide you out of trouble. The cost is a SASE and 
one extra first class postage stamp. That is one way how I will 
honor my commitment to YOU and to Hobby Radio. Conflicts of 
interest will be managed and kept to a minimum, accordingly. 

(Please turn to Page 7) 




CAVEATi Intercepting SCA prograas without prior authorization is 
forbidden by the Electronic Conunications Privacy Act (ECPA) of 
1986, You could be subject to criminal or civil prosecution ! 

Virtually ignored by the consumer press, by the high fidelity and 
stereo industry, and by FM listeners in general, is a special 
medium of broadcast communications which is available in alaost 
all areas of North Aaerica. FM subcarrier broadcasting was first 
deaonstrated in 1953 by its inventor, the late Major Edwin H. 
Armstrong. Multiplexing of sore than one program on a carrier was 
authorized to begin in the United States by the FCC in 1955. Long 
eclipsed in the public eye by FM stereo, another multiplexing 
developaent, SCA-FM has subsequently becoae the domain of special 
interest groups and commercial ventures. 

FM-SCA monitoring, however, has enjoyed a steady growth in the 
last 38 years, thanks to a host of published articles that showed 
how to assemble FM subcarrier adapter kits and thanks to the 
companies that supply the kits, components and radios to make SCA 
monitoring possible. There is a muddled distinction between 
FM-SCA and FM stereo, both of which are transmitted simultaneously 
on one frequency from the same FM station. FM-Stereo and FM-SCA 
are both “multiplexed 8 transmissions and both can be detected by 
unsophisticated equipment. It's just that an FM receiver needs a 
little "extra" before it can detect SCA. 

Not all FM stations sake use of subcarriers to supplement their 
regular programming, but most do because of the profitable things 
that can be done with this interesting medium. SCA can be 
received as clearly and reliably in the local service area as the 
regular FM signal, and up to four "channels 8 of information or 
programming can be broadcast on one frequency! The two most 
common subcarrier frequencies are 67 kHz (the original one), and 
92 kHz, a newer authorized subcarrier. One FM station can send 
out three programs and a data track simultaneously: a stereo 
program to its regular audience and two separate music or voice 
programs on SCA, such as a radio reading service for the blind at 
67 kHz and foreground music at 92 kHz. A third subcarrier 
channel, 57 kHz, is used exclusively for data which can include 
digital highway condition alerts and digital paging. By the way, 
the term B SCA M is also known as 8 SCS B , Subcarrier Communications 
Service. Either abbreviation, SCS or SCA, means the same thing. 
Canada has a similar service called SCMO. 

SCS is a monaural signal with a bandwidth up to 7800 Hz, or 
somewhat better than the very best AM stations. It is a multiplex 
technology which is "readily available 8 oyer the public broadcast 
spectrum. Tuning in an SCA transmission is no more complex or 
sinister than operating a scanner, radar detector, FM stereo, or 
color television. FM-SCA, however, is not intended for public 
reception, and conventional FM detection methods will not work. 
This is precisely why the “pay as you listen 8 concept of SCA 
works. The conceptual intent is to provide a paid subscription 
service similar to cable TV. Each FM station that offers SCA 

programming rents out to its customers a special receiver that is 
tuned ONLY to their frequency. When the ECFA of 1986 was being 
concocted, the FM Broadcast Industry jumped on the bandwagon to 
have SCA brought under protection of the Act. Apparently their 
lobby was stronger and better funded than the Satellite TV 
Industry's because today it's still perfectly legal to operate a 
satellite dish antenna in your back yard to receive non-scrambled 
network transmissions. It's still legal to copy API and UPI 
teletype and other copyrighted transmissions over the HF bands. 
But it is illegal to intercept SCA broadcasts, even though the 
technology required to do so is much less complex than either 
teletype or satellite! 

The power of money never ceases to amaze me. But it is that very 
power which results in laws against the monitoring of certain 
radio waves that pass across your property, into and through your 
home and body. Yet, other radio waves can be legally monitored 
anytime. The premise of industrial and congressional wisdom, 
apparently, is that certain radio waves are not "intended 8 to 
carry communications for the general public; others are ok. 
Hafiia. Why, then, are there not laws forbidding the eavesdropping 
on two persons engaged in a whispering conversation? Obviously, 
THOSE communications are not “intended 8 for the general public, 
either. But then those two people don't haye the money that an 
entire industry has, huh? 

Apparently it is not illegal to own radio equipment that can 
intercept SCA transmissions incidental to the main purpose of the 
receiver. There could be some potential legal jeopardy, however, 
if your radio was designed solely for reception of subcarriers. 
The bottom line is that without an adaptor or the special SCS 
receiver that the industry wants to rent out,' you cannot legally 
detect any but the normal programming. You can, however, make 
monitoring of SCA transmissions PERFECTLY LESAL by obtaining from 
your local broadcaster(s) a letter of permission authorizing your 
tuning of their subcarriers for noncommercial, hobby purposes. 
Whether or not you will actually receive such permission is not 
predictable, but it is said to have happened. 

If the interesting world of SCA appeals to you, there is a readily 
available, simple, low technology method of modifying your 
PRO-2004/5/6 or other scanner with FM Broadcast capability and/or 
regular FM Broadcast receivers to detect the SCA signals. To make 
the method legal, first draft a letter to each FM Broadcast 
station owner/aanager in your area. Explain that you are a radio 
hobbyist and that you are interested in modifying your police 
scanner to detect the subcarrier (s) of their station. Go on to 
explain that if they permit you to listen to their subcarriers, 
that you will not under any circumstance record or disseminate the 
program material and that the interception will be solely for your 
hobby use. Then explicitly ask for their permission to do this. 
If and when that permission is granted, you can proceed with a 
clear conscience. 

SCA 's programming has considerably broadened since 1977, when the 
majority of the medium was used for background music in elevators, 
stores and dentist's offices. Now, radio reading services to the 
blind are found in most metropolitan areas, usually on the 
subcarriers of public broadcast stations (PBS). Ethnic 
programming has entered major markets on either the 67 or 92 kHz 


VIM - Page 2 

REV-1 : 7-28-91 

subcarrier. Foreground or light rock music predominates on 92 
kHz, while many stations have an easy-listening SCA at 67 kHz. 
With the demise of easy-listening from many FM stations, SCA may 
be the only way to hear that format in some areas. In certain 
regions of the country, religious programs, medical news, sports 
news and special events are broadcast on the subcarriers. 

You may have to use some ingenuity to receive SCA . It could be 
well worth the effort to familiarize yourself with this 
entertainment medium and a cost effective way to do it is with an 
FM-SCS adapter kit fitted to your PRO-2004/5/6 or other scanner 
with the FH Broadcast band. Installation of an SCS Adaptor into a 
scanner with FH Broadcast capability not a complicated procedure 
and does not require much technical expertise. The rest of this 
section will highlight the minimal effort required to install SCA 
in your scanner and a source to inquire about an inexpensive SCA 
Adaptor Kit. 

SCA FOR THE PRO-2004. PRO-2005 AND PRO-2006 

After receiving permission to detect SCA signals from the 
applicable FH Broadcasters, you should contact the following 
company for information about SCA Adaptor kits that will work in 
your scanner: 

FH ATLAS - Publishing 6 Electronics 
PO Box 336; Esko, HN 55733-0336 

The above company offers two different easy to assemble and 
install SCA Adaptor kits, the ELF-1A and the ELF-II. The best 
tonal quality is available from the ELF-1A, but unfortunately, it 
allows detection of only one of the three possible subcarriers, 
and you have to specify which. The ELF-II has a special tuning 
control that allows tuning of all subcarriers, so for the scanning 
hobbyist, this is probably the best way to go. The slightly 
degraded tone quality of the ELF-II is probably not noticeable in 
a scanner anyway, like it could be in a high fidelity stereo. 

The ELF-II SCA Adaptor kit comes complete with an etched 4 drilled 
printed circuit board about an inch or so square; a 14-pin IC and 
about a dozen resistors and capacitors. The kit does not include 
an IC socket so I suggest you add a 14-pin DIP socket to the kit. 
Radio Shack offers a couple from which to choose. The ELF-II kit 
is easily assembled within a half hour or so and special 
techniques are not necessary. The assembly instructions are 
adequate, especially if you lay everything out and study things 
first. The kit comes with a trimmer potentiometer that is 
supposed to be installed on the circuit board, but it is highly 
suggested that you leave it out and instead install a comparable 
value ’volume control' pot mounted somewhere on the exterior of 
your scanner so you can easily tune in the different subcarriers. 
Host any 25k-50k pot will do. 

The ELF-II Board is best installed inside the scanner away from 
the power transformer and the speaker where it could pick up some 
hum and interference. Otherwise, location and positioning are not 
critical. The ELF-II board has four wires or external 
connections: +8v ; ground; SCA-In; and SCA-Out. A DPDT switch 
(toggle or slide) with five wires is required to complete the 
project, so that you can switch between regular FH programming and 

SCA as desired. The switch and the three-wire tuning control are 
the only necessary external controls. 


See Figure 1, Installation Diagram For Connection of the ELF-II To 
The PRO-2004 and PRO-2005/2006. 


This procedure deviates from the instructions for the PRO-2004 
that come with the ELF-11. Hount the ELF-II Board anywhere that’s 
convenient and out of the way. Remember, you’ll be making lots of 
modifications, and you don’t want to use up valuable ‘real estate’ 
without a plan. You’ll want to install a DPDT switch and a 
25k-50k potentiometer somewhere, probably on the rear case of the 
scanner. The SCA-IN tap in the PRO-2004 is at IC-4, Pin 2. Just 
solder the wire from SCA-IN directly to Pin 2 of IC-4. Cut the 
RED wire at CN-4 and wire the two cut ends to the SCA Switch as 
shown in Fig-1. Wire the SCA-OUT to the SCA Switch as shown. 
Power for the ELF-II Board should be tapped from the Emitter of 
Q-32 and routed to the other section of the switch before going to 
the ELF-II. The ground lead on the ELF-II can go to any scanner 
ground point. Solder three hookup wires to the three holes on the 
ELF-II that were for the supplied trimmer adjustment (not used) 
and connect those three wires to the new potentiometer, pin for 
pin, on the rear case of the scanner. Actually, two wires will do 
nicely if you first study the foils around those three holes for 
the trimmer. If it confuses you, go ahead and use three wires; no 
big deal. 

PRO-2005 4 PRO-2006 

You guys might have it a little easier. Mount the ELF-II Board 
anywhere convenient and out of the way. Remember, you’ll be 
making lots of modifications, and you don’t want to use up 
valuable "real estate' without a plan. You’ll want to install a 
DPDT switch and a 25k-50k potentiometer somewhere, probably on the 
rear case of the scanner. The critical SCA-In tap in the 

PRO-2005/2006 is at a small circuit trace that comes from IC-6, 
Pin 10. Just follow that trace (viewed from the top side of the 
board) for about an inch to where it terminates at an 'unused 
solder pad'. Solder a hookup wire from this pad to the SCA-In 
terminal on the ELF-II. Power for the ELF-II is taken from the 
Emitter of Q-32 and routed through one section of the switch 
before going to the SCA Board. Now locate CN-5 on the left-rear 
Main Board. There is a cable bundle that goes from CN-5 to the 
VOLUME control on the front of the scanner. Locate the RED wire 

at Pin #3 of CN-5 and cut it at a point halfway between the 

connector and where the red wire disappears into the cable bundle 
sheath. Strip the two cut ends and tin with solder and then 
splice a hookup wire to each of the cut ends. Be sure to insulate 
the splices, preferably with heat shrink tubing. Route these two 
hookup wires to the vicinity of where the switch will be 
installed. Solder three hookup wires to the three holes on the 
ELF-II that were for the trimmer adjustment (not used) and connect 
those three wires to the three lugs of the new potentiometer, pin 
for pin, on the rear case of the scanner. Actually, two wires 


mi - Page 3 

will do nicely if you study the foils around those three holes for 
the trimmer . If it confuses you, go ahead and use three wires; no 
big deal. The rest of the instructions that case with the ELF-II 
are clear enough and we need not go further with the® here. 


I suppose that the ELF-II can be successfully installed in other 
scanners that have the FH Broadcast Band, such as the Regency Z-60 
and the Realistic PRO-2003. There are probably others, too. Hhen 
you contact the above supplier of SCA Adaptor Kits, mention the 
type of scanner you have and ask if they offer explicit 
installation instructions. If your scanner does not have FH 
Broadcast (88 - 188 MHz ) capability, forget it, or install the SCA 
Adaptor in a regular FH BC receiver per the supplier's directions. 


CAVEATi Again, reaeaber that it is illegal to i onitor an SCA 
transaission nithout the expressed permission of the broadcasters 

Operation is quite simple. Program your scanner for an FH 
Broadcast signal known to have SCA programming. Keep the SCA 
switch OFF until you've tuned in the FH station.. Flip the "ATT* 
switch on the rear of your scanner (PRO-2084/5/6) back and forth 
between the 0 and -IBdB positions and select the position that 
offers the BEST reception of the regular FH signal. Then flip the 
SCA switch ON and adjust the SCA Tuning Control until a signal 
pops in. Nhen in the SCA-mode, you'll hear all kinds of weird 
noises and maybe even some very distorted signals as you adjust 
the Tuning Control. Nhen you hit a subcarrier, though, there will 
be no doubt that you've got SCA. You'll have to turn the VOLUME 
up a little higher than normal. 

Fine tune for the clearest reception to enjoy commercial-free 
programming. If you like, flip the SCA switch ON and OFF to 
ensure that you're receiving two different programs. Now and 
again, especially with Muzak™ programming, there will be 
periodic, silent pauses for up to 98 seconds. If you are tuning 
for a subcarrier during those intervals, you'll miss it and maybe 
think something is wrong. A typical pause is around 18 seconds. 

Now the question arises as to HOW you are to knew which FH 
stations offer SCA programming and which don't? There won't be a 
program list in your local newspaper or “Entertainment Guide 3 , 
that's for sure. You can try phoning the stations in your area 
and ask, though most of the people you first reach will either be 
coy or they might not know about SCA! It's possible that only the 
station engineering and managerial teams know anything about SCA, 
so if the receptionist gives you a bland reply, ask for an 
engineer or manager. Of course, as you receive replies from your 
requests for permission to receive SCA signals, you'll probably 
know which ones offer it. 

There is another resource to draw upon if any aspect of FH 
Broadcasting is ingrained into your hobby interests: the FH ATLAS 
AND STATION DIRECTORY which is available from the same source 
given above for the SCA Adaptor Kits. The FH ATLAS is a source 
book of all known FH stations in the US, Canada and Hexico. The 
stations are listed alphabetically by state and city, and again 

numerically by frequency. The FH ATLAS also has detailed maps of 
each state and Canadian province which show the FH stations in 
each city! The FH ATLAS AND STATION DIRECTORY elucidates the 
types of programming offered by each station, for both regular and 
SCA program formats! The FH ATLAS , a handy reference work for the 
monitoring post, is updated yearly. It will be a great addition 
to your radio library if you are an FH-DX nut or an SCA freak. 


A RE6ULAR FEATURE! This column will be a monthly feature, 

probably for a long time to come. Errors, changes, improvements 
and upgrades to the modifications published in my books will be 
kicked around right here. Your input and observations about 
troubles, difficulties and successes with the mods will also 
usually be discussed here. Brand new material will appear 
elsewhere in the 'USA*. This column is solely to keep my Scanner 
Modification Handbooks updated! 

FEEDBACK It UPDATE: Except for typographical errors throughout the 
text, the SCANNER MODIFICATION HANDBOOK, Vol 1 is generally 
accurate and free from technical errors. There is one significant 
error in. the text that you should mark right away. Refer to page 
18, the formula for line of sight between two antennas on a curved 
earth is wrong as shown. The correct formula is as follows: 

D(mi) = <\l 2 Ht^j + \l 2 

The procedure and answer to the example given is correct, however. 
Apologies tor any inconvenience this oversight may have caused. 


Several mods in the SCANNER HQDIF1CATIQN HANDBOOK, Vol 1 are 
outdated or not applicable anymore and should not be performed. 
Better versions have been developed and will be available soon. 
Cancel the following modifications: 

HOD-12: An S-Heter for the PRO-2804/2885; Hethod 1 
HOD-13: An S-Heter for the PRO-2004/2005; Hethod 2 
HOD-17: CHT k Other Channels for the PRO-2021 [Haybe] 

Huch improved replacements for HDDs 12 It 13 will be forthcoming 
and the old ones just aren't worth it. Besides, HOD-13 was full 
of errors and major weaknesses anyway. Stay tuned for some super 
superior S-Heters soon. HOD-17 is simply not capable of yielding 
the desired results as suspected anyway. There is no sense in 
trying it. It won't work. 


HOD-1: Cellular Restoration for the PRO-2804/5/6 

No change for the PRO-2884, but this sight make it clearer 
for the PRO-2005 It 2086: Clip diode D-502, which is 

located immediately behind the numeral "3 n key on the 
keyboard. All you have to remove is the top plastic cover 
to find D-582. It is clearly labeled. 

HOD-2: Speeding SCAN It SEARCH rates in the PRQ-2884/5; no change 

7 HE Mid SCAHHER REPORT ' (c) 1991 

V1H1 - Page 4 

MQD-2c: New for PRO-2006: DO NOT install D-501 as for the 2035; 
instead, clip D-533 to increase speed from 26 to 30ch/sec. 
NOTE: clip D-503 ONLY in the 2006; but NOT in the 2005! 

MQD-3: Speeding SCAN & SEARCH rates in the FRO-2034/5; no change 

M0D-3c: New for PRO-2005: You can make your PRO-2035 run faster 

by converting it to a PRO-2006 first. You only need two 
or three parts: a new CPU chip; a new Clock Resonator; 

and maybe a new plastic front panel, if that trips your 
trigger. These are standard parts stock at Tandy National 
Parts Center; 900 E. NORTHSIDE DR; FT. NORTH, TX 76136; 
(800) 442-2425. Part numbers for the PRO-2086 parts to 
install in your PRO-2305 are as follows: (By the way, when 
you call, have a credit card handy and ask for parts for 
the PRO-2806, catalog number 23-145; then mention below:) 

CPU, IC-501: GRE-0918 

Cerasic Resonator, CX-501: CST12.0MT 

Plastic Front Panel: BA-89D-8383 

You can dispense with the Cerasic Resonator, CX-501 , by 
replacing it with an 18 MHz quartz microprocessor crystal 
which will yield speeds up to 45 ch/sec. Otherwise, the 
replacement CST12.0HT will yield stock speed of 26 ch/sec. 
This mod is easier said than done, even though the 2335 & 
2086 CPUs are directly interchangeable, fleiomg and the 
replacing of those super-aini 72-pin chips is not easy. 
He Mill coyer the a echanics of this process in a future 
issue , so hold off if you're unsure . 

New for PRO-2386; You can sake your PRO-2836 run such 
faster, even after MOD-2 above. Replace the Cerasic Clock 
Resonator with up to an IS MHz quartz microprocessor 
crystal for 45 ch/sec. Reaoving and the replacing the 
ceraaic resonator, CX-501, is not very easy. He Mill 
cover the aechanics of this process in a future issue, so 
hold off if you're unsure. 

MQD-4: Improving Squelch Action: PRO-2334/2885/2306 
PRO-2834: No change 

PRO-2835/6: No change in principle, but added detail 

sight be useful. R-152 should be resoved, but this is 
easier said than done because it's on the bottom side of 
the sain board just beneath IC-2. It can be accessed from 
an angle through a slot in bottom side of the chassis. The 
best bet is to slit the circuit trace that goes to R-152 
from IC-2, Pin 14 and let it go at that. This effectively 
removes R-152 fros the circuit anyway. The rest is easy 
froa the top side of the main board. Solder a mini 208-k 
trimmer pot directly to Pins 12 & 14 of IC-2 and adjust it 
for desired squelch action; about 188k-15Bk ohms will 
probably give best results. 

HOD-6: Automatic Tape Recorder Switch for PRD-2884/5/6: This mod 
is basically sound, but I've developed a simpler version 
that will appear as MOD-33 in Vol-2 of ay book to be 
published in early-mid 1991. If you haven't done MOD-6 
yet, hold off and wait for MOD-33. 

MQD-6: PRQ-2004/5/6 - Change 1; One thing I don't like about 
MOD-6 is its DC power connection point, which conceivably 
could drain the Memory Retention Battery if a power 
failure occurred and if your ATRS switch were left on. 
Refer to page 96, Vol-1 and try connecting the DC power 
lead to the emitter of 0-32. R-5 sight need to be 

jumpered out if operation is at all weird or flaky with 
the new +8.3 power. Otherwise, MOD-6 is great! 

MOD-9: Disabling the Beep in the PRQ-2004/5/6: Why? I dunno, but 
some people have to do it. No changes here, but there is 
a better approach. Why not put your Beep on a volume 
control? It can be easily done by replacing a resistor 
with a 5-k to 25-k potentiometer or trim pot. The 
appropriate resistor to replace is: 

PRO-2834: R-213 

PRO-2085/6: R-223 

This way, you'll be able to not only control the loudness 
of the Beep, but also turn it OFF. 

HQD-12: Cancelled; wait for MOD-25 

MQD-13: Cancelled; wait for MQDs-25 or 26 

MOD-16: 6,433 Channels For The PR0-2384/2885/2386: Much to be 

discussed here, but for now, chanqe R-1,2,3 fc 4 to 47-k 
ohms, RS 1271-1342 . Refer to pages 138-131, Vol 1. 
Depending on the printing of Vol-1, R-1,2,3, 4 are wrong 
either as 1-k or 4.7-k ohms. Change your book thusly. 

MOD-17: Cancelled; not possible 

MQD-19: 3,283 Channels for the PRQ-34: See comments under MOD-16 

MOD-28: Restoring Cellular Freqs in the BC-953XLT: No change, 

however, it has come to light that later production models 
of the BC-958XLT require a different procedure than given 
in MOD-20. This will be detailed in MOD-42 in the cosing 
Vol 2. By the way, the Reqency R-1608 is identical to the 
BC-760/950 XLT. 

MOD-21: Restoring Cellular Freqs in the BC-233/205XLT: No changE, 
however, it has cose to light that later production models 
of the BC-288/285XLT require a different procedure than 
given in MOD-21. This will be detailed in MOD-40 in the 
cosing Vol 2. By the way, the Regency R-4838 is identical 
to the BC-280/205XLT. 

HQD-22: Restoring Cellular Freqs in the BC-768XLT: No change, 

however, it has cose to light that later production models 
of the BC-768XLT require a different procedure than given 
in MOD-22. This will be detailed in MOD-42 in the cosing 
Vol 2. By the way, the Regency R-1608 is identical to the 
BC-768XLT and the BC-953 XLT. 

Ok, that's the roundup of the latest developsents on the old sods. 

Stay tuned for a detailed dissection of MOD-16/19 changes and 

enhancements next month. Please tell about your mod experiences! 


V1H1 - Page 5 


The 'IIMLII SCANNER REPORT' is YOURS. Much of the material here 
will be instigated and developed, in part or in whole, by others. 
My job is now less to create and develop and more to review, 
debug, test, evaluate, interpret, translate and write; a job that 
suits me well. Priaeval forces are bringing us together; we are 
stepping to the beat of a priaordial drummer, You and I need each 
other equally; no acre, no less. When I think of the basic act of 
what we are doing here, goose buaps ripple over ay skin. To be 
sure, the essential rudiaent of our autual act is a simple 
manifestation of Supply and Deaand in a Free Enterprise. Oh, but 
there is acre and very such to the point. 

We are gathered here together, unwittingly drawn into serving a 
basic, fundamental need of all life; we are hearing the primal 
scream in a modern setting: COMMUNICATIONS. Don't think for a 
minute that your interest in hobby radio is an attraction and 
nothing more. An interest is a superficial illusion created by 
the conscious mind to rationalize, to justify and to compel. The 
conscious mind does not clearly interpret the genetic program 
codes that silently and inexorably guide the tides and currents of 
our inner longings, desires, ambitions and actions. A primeval 
genetic code governs the core characteristics of Life; breathing, 
metabolization, sleep, and more. As these can be termed essential 
needs, so too, can be COMMUNICATIONS, for what living thing does 
not communicate with another near it? So it happens, incidentally 
or purposefully, the higher the intelligence of life, the sore 
evolved is its communications structure. No wonder the dinosaurs, 
many of which had a brain at each end, are extinct. But Man rose 
from the primordial soup to become the most intricate, highly 
refined communications system in Earth's 4-bi 1 1 ion+ year history. 

Not only has the human body evolved an unfathomably intricate 
organic communication structure, but so too has Society evolved an 
artificial communication network almost as unfathomable! Consider 
the networks of the telephone, transportation, sail and satellite 
systems, telegraph & teletype, spoken, written and sign languages, 
and RADIO COMMUNICATION ! Are these not arteries or veins for the 
Life Blood of Society? Isn't COMMUNICATION that very Life Blood? 
You have not wandered aimlessly and haphazardly into an interest 
in radio. You were subtly, silently, inexorably drawn, guided, 
directed and, in some cases, downright shoved into radio. 

And so here we are, you and I, doing what the primordial soup 
programmed us to do: IMPROVING OUR ABILITY TO COMMUNICATE. All of 
us chose RADIO as a specific artery, but we might also be truck 
drivers, mail handlers, telephone operators, ship captains, cooks, 
construction workers, politicians, plumbers, writers, teachers, 
janitors; each and every one being a link to a different artery or 
capillary for COMMUNICATION. Our common bond is radio and it is 
that artery in which we will improve upon that handed to us from 
somewhere up stream. It is what we are supposed to do, for what 
river narrows to a trickle before meeting the Sea? No; a river 
begins as a trickle; then it grows, widens, deepens and develops 
into its full potential before losing its identity at the End. 

Ne will do no less. Somewhere, someone digs copper ore cut of the 
ground; someone else melts the ore and pours it into bars. Another 
draws that bar into wire. Another makes capacitors; another packs 
carbon into a resistor; another turns metal into plate. Someone 

else bends, trims and cuts that plate into a chassis. Then, a 
manufacturer assembles all the component parts into a scanner and 
breathes “life" into it. Others package that scanner and convey 
it to a store shelf. A day later, you walk in and plunk down the 
fruits of your labor and take it home to another shelf where it 
becomes a tool that helps you tune closer to the Life Blood of 
your community. The process can end right there, and it is ok if 
it does, for the Primordial Purpose has been fulfilled. 

Some of us are not satisfied to leave it there; not when a buck's 
worth of parts and an hour's time can result in something more 
suitable; functional or better performing. We are "hackers"; we 
dare to modify, to change, to probe and to improve on the efforts 
of those before us? And why not? There are two reasons why not: 

(1) manufacturers do not want us to modify their products, partly 
because they fear liability if someone gets hurt or killed; partly 
for if their design is changed, they can't be responsible for the 
product’s conformance to technical and legal specs, and partly 
because they think you are stupid and will sake a serious mistake 
and then not be able to enjoy their product. Manufacturers 
universally want their customers to be happy; blindly happy. 

(2) Governments don't much like for us to modify things. Not that 
it's against the law in all cases, which it isn't, but governments 
are not content to let things be and otherwise conform to natural 
forces. If they did, they would shrink to about 12 of their size 
and THAT can't be at all! Unemployment would rise because of all 
the people who couldn't get a real job in a competitive market. 
For example, government dramatically cautions you against opening 
the case of your scanner because you sight touch something on the 
A/C line and get killed. Never mind that your aether or spouse 
will caution you just as well or better. The government likes you 
and your tax dollars very such and it wants to protect and nurture 
you and serve your best interests and have you fall at its feet in 
worshipful adoration, and then gratefully give it more power 
because it just proved it's smart and you're stupid. 

'Bcuse me, but I had to have a little fun. I think we have a 
great nation and a fine government, but just between you and me, a 
little fine tuning and improving is needed, just like our 

Speaking of which, let's get down to brass tacks To those of 

you who dare leap into the dark, dank, bottomless void of your 
scanner with nothing more to go on than a wisp of trust in my 
say-so, to hack, to cut and to chop, diligently following 
excruciating detail after detail, I salute you. 

YOU, who patiently and persistently follow every detail to the 
success of a modification; YOU, who ride the emotional yo-yo 
through the agony of defeat to the thrill of victory in your 
modification efforts; and YOU who fall into the bleak depths of 
despair over a tiny hidden error, before finally breaking through 
to success; all of YOU will at some point in your modification 
adventures, reap the ultimate reward: an experience of one of the 
most exhilarating, euphoric natural highs of your Life. This will 
be your badge and YOU, herewith and forever sore, shall be proudly 
known and recognized among your peers as: 

■’ HACKER •• 


UNI - Page 6 

(Continued from Page 1) 



UNI - Page 7 

But if we have your filled-in subscription blank, complaints will 
be few because I will use the inforaation YOU provide to compile a 
statistical profile of WHO reads the 'THE WORLD SCANNER REPORT \ 
Make sure we have a record of which scanners you own. THAT alone, 
will tell se a lot about what you want in the 'WORLD SCANNER 
REPORT "\ If the 'WSR' offers what you want, you'll be happy! The 
'HSR' is so new that it is very flexible and not rigidly committed 
to any single direction other than the technology of scanning, in 
general. Over the next few aonths, I will use the subscription 
blank data to chart a course into the future. By the way, feel 
FREE at any tine to complain or to critique our subject aatter and 
operations. Your opinion counts! 


As a new operation, we have to work with what is available. A few 
years ago, this format and print style was perfectly acceptable 
for a newsletter. What you see here is rather archaic for the age 
of Desktop Publishing. The question for the time being is: Does 
it affect the QUALITY of the inforsation? I would like to think 
not. But you may rest assured that we will work constantly to 
iaspleient new techniques, new ideas and proven concepts. He sill 
do this on a gradual, planned basis to avoid price increases and 
needless waste on our part. Available machinery consists of an 
Apple system and several thousand $$$ worth of inforsation & data 
handling hardware & software. For you ccaputer nuts our system 
consists of an Enhanced Apple He with 3-Mb RAM; 30-Mb Hard Drive; 
two Viz' drives; two 5 l / 4 " drives; 1-Mb RAM drive; 2403 baud 
modes; Accelerator card; and Appleworks TH 3.0 Integrated Software 
with TifieOut™ enhancesents. This system will outperform sost 
anything else at triple the cost; it just doesn't look pretty. He 
plan to upgrade to an IBH-386/coaipatible or saybe a Macintosh 
systes, but for now we have to sake do. 

Apologies for the administrative content of this first issue, but 
you need to know what is happening, and there will be less and 
less of it with each succeeding issue. 

PRO-2004, 2005 V 2086 COMPARED 

The PRO-2005 and PRO-2006 scanners are virtually identical with 
only three differences. The least important distinction is the 
front plastic panel. They are mechanically the sase, though, just 
with different markings. The PRO-2006 runs at 26 chan/second; the 
PRO-2035 at 16 chan/sec. THAT is the ONLY perforaance difference 
between the two and there are only two parts differences inside 
the scanners: the CPU chip (IC-581) and the Clock Oscillator or 
resonator (CX-581). CX-501 in the PRO-2005 is 7.37 MHz while its 
counterpart in the PRO-2006 is 12 MHz. This alone accounts for 
the speed difference between them. You cannot, however, pop a 12 
MHz crystal into the PRO-2005 because its CPU won't run that fast. 
The PRO-2006's CPU is a pin-f or-pin and function-for-f unction copy 
of the 2085 's, but it was redesigned to run at 12 MHz. Therefore, 
to make a PRO-2006 out of a 2005, IC-581 and CX-501 must be 
replaced with the appropriate parts for a 2886. For a finishing 
touch, replace the plastic front panel, and voiia: your PRO-2895 
becomes a real PRO-2086, in appearance and in perforaance! 

PRO-2304 COMPARED TO THE PRQ-2005/6 : The functional difference, 
other than appearance, between the PRO-2884 and 2305 is 188 
channels of prograasable aeaory. The PRO-2834 case with 383 
channels, while the PRO-2835/6 have 488 channels. My easy MOD-15 
adds the H aissing # 188 extra channels and basically turns the 2384 
into a 2895. There are aany insignificant internal differences 
between the 2884 and 2835/6, but not in function or perforaance! 

Therefore, the question arises: Can the PRO-2884 be converted to a 
PRO-2806? Certainly NOT in looks, but lay be in performance! The 
bottom line is that the PRO-2084/5/6 are all pretty such the same 
radio with only minor differences! The 64-pin DIP CPU in the 2884 
has the exact same functions as the 72-pin SMT CPU in the 2886! 
Of the 72 pins, 3 are not functional, so that leaves 64 pins to 
wire into the PRO-2804. Obviously, we would also change out the 
clock oscillator in the PRO-2804 to 12 or IS MHz for Harp Speed. 
As far as I can see, the process should be limited to an exchange 
of the CPU and Clock Resonator! This is the general strategy, 
anyway, and it is in the plan to do it soon. Some of you 
ambitious hackers sight have beaten ae to the punch, and if you 
have, please tell us about the experience! 







PHONE: ( 1 




RADIO INTERESTS? (Put YEARS OF EXPERIENCE in each block that applies! 

VHF-UHF Aaateur 

CB Shortwave 


Scanning? . Radio? 

Or Occupation: 

Radio? Listening? 


List the sake & model of 

your scanners and other radio equipment: 

List the sake It model of any computer equipment you own/operate: 



Check Items 

Single copy, per issue $4.88 $4 surf/15 Air 

1991 (6 fios,Jan-June) $15.00 $17 surf/$22 Air 

1991 (1 yr) Jan-Dee $25.88 $38 surf/$38 Air 

1991-92 (2 yrs) $45.83 $55 surf/$7B Air 

List what you want in this newsletter; subjects, topics, etc 

Enclose a # 1§ S.4.S.E. and one loose extra stasp if you 
need other inforsation or a personal reply/ 

Figure 1 

TO THE PRO-2004. PRO-2005 and PRO-2006 

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dSMWItronics Engineering 

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PO BOX 262478 
SAN DIEGO, CA 92196-2478 



The Hackers of the World, who take the calculated risk 
for the sake of challenge; for the thrill of victory; 
or maybe because someone told you not to do it 
or said that it couldn't be done, 
and so you did it anyway. 

The Hackers of the World, who know that anything 
fashioned by the hand of flan, without exception, 
can be improved, and then do it. 

The Hackers of the World, who are sometimes thought 
to be dull and stupid, but who pay the salaries of those 
who fancy themselves bright and smart. 



-= The Publisher =-