PRO2004.7
Part 4/4

                         Owner's Manual

     The  user  manual  suffers  from  Japanese  to  English
     translation  problems,  but  is fairly good, resembling
     other Radio Shack scanner manuals.

     A single page frequency allocations chart is  included,
     but  is  not current.  There is a very simplified block
     diagram, but no  schematic.   The  Maintenance  section
     contains  a  useless troubleshooting chart, accompanied
     by advice like "keep it dry" and "do not drop".  Thank-
     fully,  detailed  service manuals for Radio Shack scan-
     ners are usually available for $5.00 or $7.50.

     The PRO-2004 is warranted for 1 year,  which  is  reas-
     suring.


                         What's Missing?

     So with all these neat features,  what's  missing  from
     the  PRO-2004?  A "search and store" mode, like that on
     the ICOM R7000 and older Bearcat 250  would  have  been
     nice.   A  lighted keyboard and a signal strength meter
     would also be welcome.

     Having a COR (carrier operated relay) output, like ICOM
     R7000  and  old  Bearcat  250 have, would be useful for
     actuating a tape recorder.


                             Summary

     If all one wants is a scanner to monitor  local  police
     and  fire,  there  are  certainly  cheaper  and simpler
     models than the PRO-2004.  This scanner  is  for  those
     who  enjoy  actively  exploring voice communications in
     the VHF/UHF spectrum.

     The PRO-2004 has the right  features  and  performance,
     especially  for  scanning the wide 225-400 MHz military
     aircraft band.  Good design should not to be taken  for
     granted.  GRE engineers used the power of the micropro-
     cessor to implement useful features  in  the  PRO-2004.

     Similar processing horsepower was not used so wisely in
     a recent Yaesu scanner.

     At about $400, the PRO-2004 provides a good alternative
     to those not wishing to spend $950 for an ICOM R7000.

TABLE 1.  Sensitivity of Radio Shack PRO-2004 vs. ICOM R7000

         _______________________________________________
        | Band       |  PRO-2004         R7000         |
        |____________|_________________________________|
        | 47 MHz     |  slightly less    slightly more |
        |            |  sensitive        sensitive     |
        |____________|_________________________________|
        | 72 MHz     |  more sensitive   less sensitive|
        |____________|_________________________________|
        | Commercial |  (not tested)     (not tested)  |
        | Air Band   |                                 |
        |____________|_________________________________|
        | 150-165 MHz|  equal            equal         |
        |____________|_________________________________|
        | 223 MHz    |  less sensitive   more sensitive|
        |____________|_________________________________|
        | 460 MHz    |  equal            equal         |
        |____________|_________________________________|
        | 855 MHz    |  much more        much less     |
        |            |  sensitive        sensitive     |
        |____________|_________________________________|
        | 953 MHz    |  more sensitive   less sensitive|
        |____________|_________________________________|



TABLE 2.  Sensitivity   of   Radio   Shack   PRO-2004    vs.
          UNIDEN/Bearcat 800XLT

         _______________________________________________
        | Band       |  PRO-2004         800XLT        |
        |____________|_________________________________|
        | 47 MHz     |  equal            equal         |
        |            |                   (many images) |
        |____________|_________________________________|
        | 72 MHz     |  N/A              N/A           |
        |____________|_________________________________|
        | Commercial |  (not tested)     (not tested)  |
        | Air Band   |                                 |
        |____________|_________________________________|
        | 150-165 MHz|  less sensitive   more sensitive|
        |____________|_________________________________|
        | 460 MHz    |  less sensitive   more sensitive|
        |____________|_________________________________|
        | 855 MHz    |  slightly less    slightly more |
        |            |  sensitive        sensitive     |
        |____________|_________________________________|


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