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(c) 1995-98 (All Rights Reserved) by:
    Bill Cheek and COMMtronics Engineering

This file is for personal use only and may NOT be placed on
a CD-ROM nor any other media that conveys, stores, or
transports for any monetary cost including shipping &
handling, without expressed permission of the author. This
file can only be given away, absolutely free of charge, no
strings attached. If given away, it MUST be conveyed intact,
word-for-word with no editing, additions or deletions.

                                   -Bill Cheek-
                                    Author

====================================================
                  Bill Cheek's
Scanner Modification Frequently-Asked-Questions File
====================================================

Contents
=========

ADMINISTRATIVE QUESTIONS
========================
-deleted for brevity-

TECHNICAL QUESTIONS
===================
021:  How do I restore cellular in my scanner ?
022:  What about cellular restoration ads scanners after 3/94?
023:  Are any mods available for my scanner
023a: What mods do you have for my five scanners?
023b: Can you send me "the mod" for my scanner?
024:  Where can I find mods for my scanner ?
025:  So you mean there are no mods for my scanner ?
026:  So how can I do some of these mods?
027:  Memory mods?  How can I increase the channels?
028:  How do I tell a SRAM chip from an EEPROM from CPU RAM?
029:  My  scanner has an SRAM; how do I do the mod?
030:  Do you do scanner modifications like memory mods?
031:  I'm not interested in all your mods - just one.  Will
      you photocopy the information for me?
032:  So how do I restore cellular in the PRO-2006?
033:  How can I improve my reception capabilities?
034:  How can I install the military aero band in my scanner?
035:  How can I modify my scanner to follow trunked systems?
036:  My PRO-2004 has problems, first mild and now severe.  It
      has been repaired several times.  Is it fixable?
037:  Can my scanner be interfaced to a computer for remote
      and automated control, as well as for programming of
      the memory channels by the computer?  Can the
      interface acquire data from the scanner and send it to
      the computer?


========================
ADMINISTRATIVE QUESTIONS
========================

-deleted for brevity-

===========================================================
           TECHNICAL QUESTIONS AND ANSWERS
===========================================================

021: How do I restore cellular in my scanner ?

     Forget it, pal.  It ain't going to happen.  The TDDRA
     of 1994 expressly forbids the manufacture or importation of
     "easily modified for cellular" scanners after April, 1994.
     Manufacturers turned to putty and removed the cellular
     programming from the scanners' CPUs altogether.  Sorry, it's not
     possible if your scanner was made or imported after March, 1994.

     But here is a list of all those pre-1994 scanners of which I am
     aware that ARE capable of cellular restoration:

     PRO-2004      BC-855XLT  *3        Regency 4030
     PRO-2005      BC-200XLT            Regency 1600
     PRO-2006      BC-205XLT
     PRO-2022      BC-760XLT  *4
     PRO-2026 *2   BC-700XLTA *4
     PRO-2027      BC-890XLT  *4
     PRO-2030      BC-950XLT
     PRO-2032      BC-2500XLT *3
     PRO-34
     PRO-37
     PRO-39
     PRO-43   *1
     PRO-46   *2 *5
     PRO-51   *2
     PRO-23   *2

     Note 1:  Date of Mfg code 1A4, 2A4, xA3, xA2 (label in
              battery compment), or no "A" in the serial no.

     Note 2: Date of mfg code 1A4, 2A4, -A3, -A2 (label on
             back).

     Note 3: Date of mfg code must not end in the letter
             "D", except for OAID.

     Note 4: Date of mfg code must not end in the letter
             "D".

     Note 5: Units with date code of 5A4 can tune cellular in
             30 kHz Steps using a keyboard entry sequence.

     For instance, PRO-43's imported before March, 1994, are
     modifiable, while some brought in during March and all
     thereafter are impossible to modify.  Date codes of any
     -A2 or -A3 and only 1A4 and 2A4 are assured of being
     modifiable.  3A4 and up probably aren't.

     The above list does not include those scanners that were
     naturally capable of receiving the full 800 MHz band,
     without modification, some of which include:

     J.I.L. SX-400          AOR-950              Icom R-7100 *
     Regency MX-4000        AOR-1000             Icom R-1
     Regency MX-5000        AOR-1500             Icom R-100
     Kenwood RZ-1           AOR-2500             Icom R-9000
     Uniden BC-800XLT       AOR-3000 *           Icom R-7000
     Yaesu FRG-9600         AOR-8000 *

     * pre-1994 only

     Some of these radios, if still current, had the cellular
     removed by the factory after March, 1994.  There may be
     possibilities of restoring cellular in later models of the
     AR-8000, AR-3000, and ICOM radios by replacing an EEPROM
     or reprogramming one, but that is beyond the scope of this
     FAQ, and in general, should not be considered feasible.

==============================================================
022: What about cellular restoration ads for post 3/94 scanners?

     Yes, I used to see magazine ads to "restore" cellular or to
     "unlock 800 MHz" in newer scanners.  Gasp!  This is almost a
     deception. See, they advertised the "VD" mod.

     Virtual Downconversion - better than a venereal disease, but not
     by much.  To my way of thinking, it is an inferior method of
     "unlocking" the cellular bands because:

     A. They're not really unlocked.  VD is a trick of turning off one
        oscillator and turning another one on. Typically, they set the
        scanner to the 400 MHz band, and then turn off the normal 400
        MHz Local Oscillator and turn on the one for 800 MHz to make
        cellular receivable on the 400 MHz display.

     B. There is no logical correlation between the actual cellular
        frequency and the displayed frequency.  It varies from one
        radio to the next, but suppose 880.000 MHz comes in.  It might
        be received/ displayed on 432.6775 MHz.  Duh....??

     C. The full cellular bands of 823.950-849.000 and 868.950-894.000
        are not available by this method. In fact, only a small part
        of one or the other (often not both) is available, like maybe
        10-20 MHz of the total.

     D. There is no 30 kHz stepping.  You're limited to the default
        CPU "rules" for the band in which the cellular appears,
        typically 5 kHz or 12.5 kHz.

     E. The exact results of the VD mod, generally described above,
        depend on the scanner.  Results vary from one to the next.
        None are what I'd call "good" or even acceptable.

     The good thing that can be said for the VD mod is that it is the
     ONLY way to get any cellular at all from post March-1994
     scanners.  So, the advertisements that you may have seen are not 
     exactly "fraud".....but you sure don't get much for your money.

==============================================================
023:  Are any mods available for my scanner ?

     You may have the wrong impression about scanner modifications 
     and hacking.  Mods are not "available" in the sense that they 
     can be found on a store shelf, or laying on the top of someone's 
     mind who can tell you in so many words or less how to turn that
     that Snakebite X101  scanner into a fire-breathing, rip-snorting
     smoke-belching behemoth of a Turbowhopper.

     All scanners can be modified for something; generally a
     dozen or more things.  But only a few scanners have
     anything written about them in detail.  And you have to
     know where to LOOK. You can't just up and ask for "mods".

     Well, you *can*, but you won't get a substantive reply.

     It takes me several days to several weeks and sometimes
     MONTHS to work up and write about a hotshot mod for a
     decent scanner, and after THAT level of effort, it's not
     possible to make it "available" off my fingertips. Continue 
     reading below. There are answers to your question.

==============================================================
023a: What mods do you have for my five scanners?

     I wish I knew what people mean by: "what mods do you have..." 
     I don't "have" mods, exactly.....

     I wrote three books and seven years worth of the monthly WORLD
     SCANNER REPORT that feature mods for a variety of scanners.  
     With over 900 scanners ever marketed, I don't pretend to cover 
     them all.....just, a fraction.

     Many of "my mods" can work with most any scanner.... but there is
     no way I can write explicit instructions for more than the bench
     model on which I developed that mod. I can and do offer hints on
     how to apply these mods to other scanners but again, not having
     the scanner in front of me and not having the Service Manual,
     there is little I can do other than hint.

     I have to leave it to the user to study the published materials
     and then ask specific questions to which I am happy to provide
     specific answers...if I can. That's about as good as it gets.

     You are strongly encouraged to thumb through my books and through
     the back and current issues of the WORLD SCANNER REPORT to see
     what interests you and to pick topical material from which you
     can phrase specific questions that have a possibility of an
     answer.

     As it is, all I can say at this point is that DOZENS of mods are
     possible for your scanners, but I have to leave it to you to do
     the legwork and research.  And when you have specific questions,
     then I can answer them.

===================================================================
023b: Can you send me "the mod" for my scanner?
     
     Well, what is "the" mod?  There are dozens of possible mods
     for your scanner.  Regardless, the answer in general is no, I
     don't "send" mods. I have published hundreds of mods for various
     scanners and other radios in my books; in the monthly World 
     Scanner Report, and as text files on my Web and FTP sites. You
     are free to exhaust these resources to your heart's content.

     Due to the overwhelming flood of requests for this kind of
     information, I can't personally research and respond to each 
     of these requests.  There just isn't time in the day for that
     workload.  If it's free information you want, try my Web and
     FTP sites.  If you don't mind paying for better quality info,
     then try my books and/or the monthly World Scanner Report.

     Lastly, you can try the Usenet REC.RADIO.SCANNER newsgroup where
     I and others sometimes publish modification information. It's free
     if you have a connection to the Internet and a Usenet reader/
     editor program.

===================================================================
024: Where can I find mods for my Brand-X scanner ?

     Mostly you can't.  There are only a handful of scanners ever 
     made that were worth solitary, focused research and development,
     specifically for that scanner.  Those scanners include:

     PRO-2004   PRO-2005   PRO-2006   PRO-2035   PRO-2042
     PRO-2022   PRO-43     PRO-34     PRO-37     BC-200XLT
     PRO-26     PRO-39     BC-3000    PRO-64     PRO-2041
     BC-235XLT  PRO-90

     You can find occasional articles and files on "mods" for other 
     scanners not mentioned above, but they are the exception to
     the rule.  Start by looking at my Web and FTP sites, and peruse
     quick-links to other sites from my WWWeb Sites:

     http://ourworld.compuserve.com/homepages/bcheek

     or:

     http://204.210.11.204

     My Web Sites have quicklinks to other sites that may contain a
     file or two on generic "Snakebite" scanners.  But don't get your
     hopes up.

     Now here is the problem: I am one of the few, (if not the ONLY)
     engineers fully committed to scanner mods.

     Yet, there are over 900 scanners on the historical list now.  It
     is physically impossible for me to dedicate attention to any but
     a few..

     That small list of scanners above reaches out to tens or hundreds
     of thousands of owners.  There is no time left for me to work on
     generic "SnakeBite" scanners that have little to offer, even
     after hours of hard work! But take cheer and read on.......

==============================================================
025: So you mean there are no mods for my scanner ?

     More or less I mean that, yes.  But, that's not to say yours
     can't be modified.  It can!  It's just that there is nothing 
     published for it; nothing in the way of step-by step instructions
     with graphics, photos, and details.

     No one would go to the time and trouble, you see?  The
     preponderance of published hacking information is for those
     scanners listed in Question 24 above. Other scanners just aren't
     interesting enough for professional investigation.

     An engineer who is capable of designing super-hacks for that
     "SnakeBite" scanner is not going to own one! Instead, he will own
     one in the Question 24 list, one that is eminently capable of
     some very powerful modifications in the first place.

     Now I said your "SnakeBite" can be hacked.  It can.

     But you are more or less on your own in the sense that I cannot
     direct you to a "shopping list" of mods from which you can pick
     and choose.  There is no such list. Any hope for you is to first 
     figure out what you want to do, and ask me a specific question.

     I can give you a few answers in advance:

     No.

     No, your scanner is likely not capable of cellular; scanners made 
     or imported after March, 1994, are not cellular-capable. Most
     scanners are not likely to be capable of extra memory; additional
     frequency coverage; and things of that nature that pretty much
     require factory design in the first place.  (See ahead for Memory
     Modifications)

     Yes.

     Yes, your "SnakeBite" may be capable of certain mods, a few
     of which include the following: (You wanted a list?)

      1.  Tape Recorder Jack
      2.  Automatic Tape Recorder Switch (beats VOX!)
      3.  Extended Delay
      4.  Tone Decoder-Rejector Countermeasure
      5.  CTCSS mod
      6.  S-Meter
      7.  Scanner-to-Shortwave Interface
      8.  Carrier-On-Indicator
      9.  Audio Improvements
     10.  Beep volume or disable
     11.  Squelch Improvements
     12.  Remote Controller
     13.  Baseband audio output for data decoding
     14.  Event or "hit" Counter
     15.  Shielding of plastic cases
     16.  External DC power
     17.  Improved Adjacent Channel Rejection
     18.  Speed up of SCAN & SEARCH modes

Then, maybe...depending....on the scanner.... the following
digital and/or esoteric enhancements.........???

     19.  Interfacing to a computer
     20.  Subsidiary Carrier (SCA)
     21.  Extended Memory to 25,600-channels & up
     22.  54-88 MHz restoration
     23.  Data/Tone/Noise Rejection
     24.  Cellular restoration (See Question 21)

==============================================================
026: So how can I do some of these mods?

     That's a problem.  No one has written them up for the basic
     scanners.  About the only way I can think of is to get one or
     more of my three books and a subscription to the WORLD SCANNER
     REPORT.  Research and study up on the mods we've developed for
     other scanners, and then compare the procedures for that specific
     scanner to yours.  Often, when I write up a mod, I give hints on 
     how to apply it to other scanners.

     Also, if you ask me *specific* questions, I can give specific
     answers. If you ask "how to do a memory mod", I'll have to refer
     you to something already in print or published somewhere.  If you
     are doing a memory mod and run into trouble, then I can help you
     with that trouble.

==============================================================
027: Memory mods?  How can I increase the programmable channels?

     That depends on what kind of memory storage system is used by
     your scanner.  There are three kinds:

     1.  On-board CPU RAM  (Random Access Memory)
     2.  Static Random Access Memory (SRAM)
     3.  EEPROM Electrically Erasable Programmable Read Only Memory.

     The first kind is most prevalent and there is no way to expand
     that kind of memory.  It is, however, usually limited to scanners
     with 51 channels or less of programmable memory.  100-channels
     and up are usually done by methods 2 or 3. So your first step is
     to determine what kind of memory is used by your scanner.

     EEPROM memory is expandable, but very difficult under most
     circumstances.  SRAM is the easiest and offers the largest
     expansion capabilities.  For example, the PRO-2004, PRO-2005, and
     PRO-2006 can be expanded to 25,600 programmable channels (and
     more)!  The PRO-32, PRO-34, PRO-37, PRO-39 & PRO-2022 can go to
     12,800- channels and beyond.  The BC-760XLT, BC-560XLT, and a few
     others can be taken to 6,400 channels and more. The PRO-2035 and
     PRO-2042 can be taken to 16,000 channels and beyond. Th PRO-2041
     and PRO-64 are good for upwards of 25,600 channels.....

     My Extended Memory Modifications are amply documented in
     excruciating detail in my books and in the WORLD SCANNER REPORT,
     complete with diagrams, photos, and many pages of instructions
     such that most casual hobbyists who know a soldering iron from a
     tire iron can do the work.  This kind of mod is not suited to
     being given out in an e-mail or a forum message in so many words
     or less. You will need to acquire the instructions before
     doing the work.

==============================================================
028: How do I tell a SRAM chip from an EEPROM from CPU RAM?

     If you can't do this on your own or after the below explanation,
     you are probably not a candidate for such a wild adventure at
     this stage of your hacking career.

     Most CPUs hold a small amount of RAM (random-access- memory),
     sufficient to store anywhere from 10 to 50, maybe a hundred
     channels or so.  This is the case for most scanners, so there is
     no way to increase that memory. Fortunately, there are two other
     methods of RAM used by a few scanners that offer possibilities
     for expansion.

     EEPROM: The least common and least expansive is EEPROM
     (electrically erasable programmable read-only-memory). The
     PRO-43, PRO-26, BC-2500XLT, BC-200XLT, BC-100XLT and BC-3000XLT,
     for example, use EEPROM programmable memory. It is possible to
     expand EEPROM-types of memory, though not by such huge proportions
     as the SRAM type. EEPROMs are usually tiny little chips with
     8-pins.

     SRAM:  A handful of scanners use a separate SRAM (static
     random-access-memory) chip for storage of frequencies and custom
     channel settings.  It is this type of memory that can be easily
     and economically expanded by factors of 2, 4, 8, 16 and even 64
     times the original volume!  Scanners known to employ SRAM memory
     include the following:

     PRO-2004       PRO-2021      PRO-32        BC-760XLT
     PRO-2005       PRO-2022      PRO-34        BC-950XLT
     PRO-2006       PRO-2032      PRO-37        BC-590XLT
     PRO-2035       PRO-2041      PRO-39        BC-600XLT
     PRO-2042                     PRO-64 

     There may well be other scanners that use SRAM memory, but either
     I forgot about them or don't know.  If you're curious about your
     scanner's potential for memory expansion, you can just about
     forget it for those with fewer than 100-channels.  The CPU's RAM
     easily handles 10 to 100 channels or so.  If your scanner is not
     on the above list, but has 50 or more channels, then look over
     its schematic diagram and parts list or scrutinize its Logic/CPU
     Board for any of the following types of SRAM chips:

     uPD446G-15          TC-5517CF-20      LC-3517BM-15
     CXK5864BP           MB-8416-20LPF     BR6265BF         HY6264

     or something similar, disregarding the last few digits and
     letters. An SRAM chip is generally characterized by a rectangular
     shape with 24 to 32 pins, each of the longest sides holding half
     the pins.  An SRAM chip in a schematic diagram will be
     characterized by eighteen or more of its pins going straight to
     the CPU chip.  Any chip with less than 24-pins is not likely to
     be an SRAM; neither is any chip in a square format.  SRAMs are
     rectangular (DIP or SMT) with 24 to 32 pins. Pinout notations of
     SRAM chips will include mystic codes such as:

     A0, A1...A9,   R/W,   CE,  I01,   I02...I08,   OE,  etc.

==============================================================
029: My scanner has an SRAM; how do I do the mod?

     Get the published instructions for Extended Memory Mods using
     larger SRAM chips.  Start by reviewing my free Table of Contents
     and Index to the World Scanner Report where you will find
     articles on memory mods. Get at least one of my books to
     supplement the WORLD SCANNER REPORT. The ULTIMATE SCANNER book
     is a good choice.

     The Table of Contents and Index to the World Scanner Report can
     be found on my Web and FTP sites.  They're also contained in my
     product information files:

     PRODINFO.ZIP   or   PRODINFO.EXE

     I can send these files by e-mail upon request, or they can be
     downloaded from my Web and FTP sites.

     Since all SRAM chips are much alike, my instructions for one
     scanner generally apply to all, and are not too difficult to 
     follow, provided you can find your SRAM chip in the first place.

==============================================================
030: Do you do scanner modifications like memory mods?

     Sure.  Contact me privately and we can go from there. One note,
     though:  I don't do cellular mods anymore. The FCC has gotten
     persnickety about that sort of thing.  In general, I don't do
     speedup mods anymore because they cause more problems than the
     speed increase is worth.


==============================================================
031: I'm not interested in all your mods - just one.  Will
     you photocopy the information for me?

     Not if it's in a copyrighted publication. My publishers own the
     copyrights to my books and my company owns the copyrights to
     material published in the World Scanner Report.  It would be
     unethical, illegal, or both, for me to make copies.

     If your budget is tight, you can in many cases get basic
     information for free from my Web and FTP sites and the real hard
     core stuff for $5/up by purchasing specific copies of the World
     Scanner Report. It is not always necessary to buy my information
     order to do the mods.  On the other hand, my published mods are
     NOT the low degree sort of thing you find on BBS's and Internet 
     sites with a few sentences or paragraphs and maybe an ASCII
     drawing if you're lucky.

     Now my FTP site contains almost 1600 modification and hack files
     of the free, get-what-you-pay-for kind of ASCII text. I lay
     claim to very few as most were developed and circulated by
     others.  But they are FREE and you are welcome to put them
     to whatever legal use suits you.  The following three FTP
     directories should keep you busy for a while:

     ftp://204.210.11.204/mod_info/megamods/
     ftp://204.210.11.204/mod_info/moremods/
     ftp://204.210.11.204/mod_info/radiomod/
     
     Most of my mods are detailed and well documented with graphics,
     including schematic diagrams, photos, and illustrations.  This
     kind of work doesn't lend itself to posting as plain ASCII text
     files.  Instead, most of my work is published in quality media
     including books, magazines, and newsletters.  The good stuff 
     just doesn't come for free and I make no bones about it.  

     On the other hand, there may be no cost if all you want are the 
     simple mods like the cellular mod to the PRO-2006.

==============================================================
032: So how do I restore cellular in the PRO-2006?

     1.  Remove the top cover of the scanner.

     2.  Look down inside the front panel behind the #3 key of the
         keyboard, and clip the exposed leads of the two coppery
         colored diodes standing on end.  One restores cellular and
         the other gives a FREE 25% speedup of the SCAN function.

     3.  Replace top cover.

     See, that's the kind of stuff that comes for free. And I am
     happy to help out in that fashion. I can't, however, subsidize
     your hobby by forking out of my pocket the high costs of 
     photography, graphic arts, and computer hardware.....  

     If you can't see this qualitative difference, then grab a few free
     hack files from myu FTP site, or a BBS or from the Internet
     .......and then invest in a copy of the World Scanner Report,
     Monitoring Times, or a book.... See for yourself.
     That's the best way. You'll become a believer.......

==============================================================
033: How can I improve my reception capabilities?

     Easy - maybe.  Just increase the height of your antenna.

     Each 10-ft increment of added height can yield an apparent "gain"
     of 3-dB. For scanner signals, 3-dB can be all the difference 
     between good reception and none at all! There is no substitute 
     for height of the antenna when trying to receive signals outside 
     your immediate geographical area of more than a few miles.  

     VHF and UHF signals weaken dramatically as they travel along the 
     surface of the earth (groundwave or plane-earth wave); much more 
     so than the spacewave that travels a couple of wavelengths or 
     more above the earth's surface.  Low antenna heights intercept
     the spacewave of only very close transmitters, and the groundwave
     of all others.  Yes, the quality and type of antenna makes a
     difference to a station's reception capabilities, but the single
     most important factor is the height of the antenna, regardless of
     its quality and type.

     Next to antenna height, the quality of the coax cable is an
     important variable.  Just about any coax is fine for 10-ft runs
     or less.  If over 20-25 ft, then use RG-6 satellite cable unless
     you want to go whole-hog on Belden 9913 or Andrew LDF-2A hardline
     coax.  In no case, should you use RG-58 or RG-59 cable except on
     very short runs, and not even then????  Signal loss in those two
     cables makes the difference between hearing and not hearing,
     compared to RG-6 satellite cable.

     Do NOT pay any mind to the prevailing opinion in some quarters
     that 75-ohm coax is too lossy because of the impedance mismatch.
     That's foolishness.  75-ohm coax connected to a 50-ohm load
     results in a 1.5::1 VSWR, for a 4% signal loss (about 0.1-dB),
     hardly worth a bead of sweat compared to the natural 25%-50%
     losses in RG-58 and RG-8 cables.

     Antenna height and good quality coax cable will help you hear 
     all there is to hear from your location.

==============================================================
034: How can I install the military aero band in my scanner?

     You can't, and that's that.  If your scanner came with the
     military aero band (220-400 MHz), then you're Fat City. If it did
     not come with it, there is no way under the sun of "restoring"
     it.  You can't restore what ain't there.

==============================================================
035: How can I modify my scanner to follow trunked systems?

     You can't, and that's mostly that.  Each trunked system differs
     as night and day with respect to other trunked systems, even 
     from the same vendor.

     It is possible for the hobbyist to gain some skill and fortitude
     in following trunked system conversations. These techniques are
     scattered around in various written works, from books, magazine
     articles, and prefaces in frequency directories...to text files
     on various BBS's and Internet archives.  These techniques, hints,
     tips, and kinks cannot be recited here in so many words or less.
     One good starting point might be the preface material in any
     recent edition of Radio Shack's POLICE CALL books.  But in a
     word, you cannot alter your scanner to follow trunked signals.

     Uniden's and Radio Shack's TrunkTracker series of scanners are 
     specifically designed to follow certain trunking systems.  Keep 
     an ear posted to the newsgroup forums for news of these 
     interesting scanners as they become more popular. 

     There is some interesting software appearing around the Internet
     these days....that may be useful in trunk following, but I really
     can't discuss anything substantive at the moment.

==============================================================
036: My PRO-2004 has problems, first mild and now severe.  It
     has been repaired several times.  Can it be fixed?

     It is possible that your PRO-2004 has defective solder joints.  
     Back in 1986, there was a production run of the PRO-2004 
     manufactured by a defective parts stuffing and wave soldering
     machines. At first, they were only marginally defective, but
     they worsened and degraded over time.

     The result, by the time the malfunctioning machines were
     discovered, was that many defective PRO-2004's had been shipped
     to market. Some immediately failed within the warranty period and
     were repaired or replaced.  Others didn't fail until after the
     warranty expired, and were either repaired or junked.  Some
     didn't fail for years.

     Failures appear to come in waves.....periodic rashes. Defective
     solder joints are a serious problem, because the radio can be
     fixed only to the extent that it is broken.  Repaired solder
     joints today have no bearing or relationship to those headed for
     failure in a week, a month, or a year.  There is no economical
     way to repair them all in one fell swoop.  A PRO-2004 with
     defective solder joints is very likely to develop more problems
     with the passing of time.  There can be no guarantees against
     subsequent related or unrelated failures.

     With that in mind, yes I do such repairs, but I cannot guarantee
     that other failures won't occur.  Costs of repair can be high,
     and I would estimate the first repair tag to be $100 plus return
     shipping. I know, it's a bum deal, but I can't do any better than
     that except to offer to buy the unit for my repair parts bin.

     I pay $25 plus shipping for defective PRO-2004's in reasonably
     clean condition.  (No basket cases....)  You might consider this
     as an alternative to continued repair bills.

==============================================================
037: Can my scanner be interfaced to a computer for remote and
     automated control, as well as for programming of the memory
     channels by the computer?  Can the interface acquire data from
     the scanner and send it to the computer?

     In a word, yes.  Many scanners "can" be interfaced to a computer
     for one-way control and automated programming of the memory
     channels.  These scanners include:

     PRO-2004   PRO-2005   PRO-2006   PRO-2035   PRO-2042   PRO-2041
     PRO-2022   PRO-34     PRO-37     PRO-39     PRO-43     PRO-26
     PRO-64

     and probably quite a few others.......

     There are three scanners that are capable not only of the one-
     way mode of remote control and automated programming, but also of
     a "data acquisition" mode where the scanner sends its display
     (channel, freq, bank, mode, delay, lockout) and other data to the
     computer for automated logging and data processing. These
     scanners are the PRO-2004, PRO-2005, and PRO-2006.

     Several companies make scanner/computer interfaces, including
     Optoelectronics and COMMtronics Engineering.

     Each interface has its own unique characteristics, advantages,
     and limitations, but all are "good" in the sense of freeing the
     operator from much of the labor and drudgery of scanning. The
     Optoelectronics interfaces are generally limited to the
     PRO-2005/6 & PRO-2035/2042.  The COMMtronics CE-232 Interface
     works in full 2-way smart mode with the PRO-2004/5/6 and as
     a 1-way AutoProgrammer and Remote Controller for a number of
     other scanners.

     A "roll your own" computer interface was published in the World
     Scanner Report, V2N1-V2N6.  Another more powerful one was
     published in my 3rd book, THE ULTIMATE SCANNER (Cheek3).

     COMMtronics Engineering's CE-232 Scanner/Computer Interface is in
     its fourth year and continues to be a front-runner and state of
     the art.  For more info:

     http://ourworld.compuserve.com/homepages/bcheek/

     ftp://204.210.11.204/intrface/

          John Montalbano KA2PYJ, seems to have designed a nice
     one-way interface and control software.  I can't vouch
     for it, but go to the following URL and see for yourself.

     http://www.qsl.net/ka2pyj/

==============================================================

That's it for now.  I will keep this FAQ updated.  If you see things
that need to be added to it, by all means, let me know.  If this FAQ
fails to address your question(s), then hit me with 'em again, but be
specific.  And be detailed with symptoms and observations if you need
tech support on mods or troubleshooting and diagnosis.  Use e-mail if
you can.

(c) 1998 (All rights reserved) Revised 05/06/98

------------------------------------------------     ----
Bill Cheek - President/CEO/Publisher             \  /
COMMtronics Engineering/World Scanner Report      \/
Box 262478 ~ San Diego ~ CA ~ 92196-2478          /\
bcheek@san.rr.com    ftp://204.210.11.204        /  \
http://ourworld.compuserve.com/homepages/bcheek /    \
-----------------------------------------------       ---

http://www.scannercentre.8m.com