Subject: BAND EXPANSION MODIFICATION FOR IC-02AT
FOR SERIAL NUMBERS ABOVE 34000
BY LTC STEVE PETERS, CAP
------------------------------------------------------------------------
1. Remove back from radio (5 screws) and bottom plate (4 screws).
2. Carefully remove radio chassis from front case by pulling out top of
radio and lifting slightly (to remove battery contacts from bottom
case). Be extremely careful of ribbon cable and heat sink compound
on power amplifier module.
3. Remove diode D2 from matrix board.
4. Add diode D4 (any small diode 1N4148; 1SS211
5. The following is a schematic of the matrix board:
ADD D4 REMOVE D2
I--+ --+-- --+-- +
V D4 ID3 I ID2 I D1
I I I I I
+ + +---+ +---+ + +
6. Install radio chassis back into front cover. Leave back off temporarily.
7. Carefully apply power to radio and enter the lowest desired frequency.
8. Adjust slug through bottom hole on VCO corr for .5 VDC at VCO test
point (just below VCO shield) at lowest desired operating frequency.
9. This completes the modification. A few words of caution: 1. The
radio is not type accepted for use in the commercial band. 2. Make
sure you reinstall the battery latch correctly on bottom of radio or
battery will become permanently locked onto radio. 3. Tighten screws
on bottom of radio snuggly. If they loosen while battery is connected
you cannot remove the battery. (This has happened to any units and
it would be prudent to periodically check these screws to assure their
tightness.)
------------------------------------
*** Be careful not to transmit out-of-band, or accidentally operate on
any non-amateur, unless you are authorized to do so.
DO NOT JEOPARDIZE YOUR LICENSE!
[EOF]
SOURCE: The QRZ Windows Ham Radio CDROM |
