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Internet Message Format  |  1994-11-12  |  4.2 KB
  1. From: kurt@cs.tamu.edu (Kurt Freiberger)
  2. Newsgroups: rec.radio.amateur.misc
  3. Subject: THE REAL Standard 558 radio mod
  4. Followup-To: rec.radio.amateur.misc
  5. Date: 30 Nov 1992 17:25:04 GMT
  6. Organization: Computer Science Dept., Texas A&M University
  7. Lines: 69
  8. Distribution: world
  9. Message-ID: <1fdipgINN6l3@tamsun.tamu.edu>
  10. NNTP-Posting-Host: ai0.cs.tamu.edu
  11. Keywords: Standard C558A extended transmit
  12.  
  13. >From a sheet that I got from a vendor, here 'tis:
  14.  
  15. MARS/CAP (Wide band transmit)
  16.  
  17. 1. Remove battery and antenna.
  18. 2. Remove front case assembly block by unscrewing.
  19. 3. Remove tthe copper plate around the back side of the display section.
  20. 4. Remove the diode indicated by D2, and add a diode 1SS301 leaving other
  21.    components intact as per the following drawing.
  22. 5. Reassemble radio and install battery.
  23. 6. Turn on power and execute master reset.
  24.  
  25. ---------------------------------------------------------------------
  26. ------------+             +------------------------------------------
  27.             |             |
  28.             |           +------+         (PC board "donut")
  29.             |           |      |                /
  30.             +-----------+      +------+        / 
  31.                         |      |      |   /---\
  32.    PC board trace/      |   D1 |      +--+ +++ |      +-----+
  33.    component layout     |      |      +--+ +++ |      |     |
  34.             +-----------+      |      |   \+-+/ +-----+-+   |
  35.             |           |      +------+    | |  |       |   |
  36.             |           +-+----+         +-+ +--+       +---+
  37.             |             |              |      |       |     <<< ---- CHANGE
  38.             +-------------+              |      |  D2   |
  39.                                          +------+       +---+
  40.                                                 |       |   |
  41.                                                 +-----+-+   |
  42.     "Not to scale"                                    |     |
  43.                                                       +-----+ 
  44.                                              **
  45.                                              **
  46.                                             \**/
  47.                                              \/
  48.                +--------+                 (about here)    +------------+
  49.                |        |                                 |            |
  50.                +--+     |                  +----+         |            |
  51.   PC board locator|     +-----------------/------\--------+            |
  52.                +--+                                                    |
  53.                |                                                       |
  54.                |                                                       |
  55.                |                                                       |
  56.                ++                                                +-----+
  57.                 |                                                | 
  58.                ++                                              +-+
  59.                |                                               |
  60.                |                                               |
  61.                |                                               |
  62.                |                                               |
  63.                |                        Opening for            |
  64.                |                        speaker about          |
  65.                |                        here (funny            |
  66.                |                        shaped opening)        |
  67.                 ...............................................
  68.  
  69. CAVEAT:  I have not tried this with my radio as yet.  This is a drawing that
  70. I got from a vendor.  I'm waiting for the 1SS301 diode to get here, as I could
  71. not find the configuration of the 3-legged beastie.
  72.  
  73. Your mileage may vary.
  74.  
  75. 73/Kurt
  76.  
  77. ---                                                
  78. Kurt Freiberger, wb5bbw      kurt@cs.tamu.edu   409/847-8607  fax:409/847-8578
  79. Dept. of Computer Science, Texas A&M University      DoD #264: BMW R80/7 pilot
  80. "We preserve our freedom using three boxes: ballot, jury, and cartridge."
  81.       *** Not an official document of Texas A&M University ***
  82.  
  83. Copied from the QRZ! Windows Ham Radio CDROM
  84.  
  85.