home *** CD-ROM | disk | FTP | other *** search
-
-
-
- The long, noisy squelch-tail of the Icom IC-28 (A or H model) 2-meter
- transceiver can be shortened by replacing C110 (4.7 uf) with a smaller
- value (0.1 to 0.47 uf). (I can't remember the source of this
- information.)
-
- I put a 0.33 uf in my IC-28H; it's a very worthwhile modification.
-
- The capacitor is on the bottom board (the one with the lithium
- battery), just southeast of IC4 as you face the front of the upside-
- down radio. The only difficult part is finding the right p-c pads to
- desolder on the back of the board.
-
- To remove the board: Remove bottom plate, unplug speaker. Unplug
- coaxial antenna connector (gray wire). Other connectors may remain in
- place. Remove 5 mounting screws, one in each corner and one near
- center. Tilt the board out of the radio. The button in the upper
- left corner is CPU reset; you may have to reprogram the memories if it
- is pressed. Remember that, although the radio is off, parts of the
- circuit are still "hot" because of the memory-backup battery, so be
- careful not to short any part of the board during the modification.
-
- --
-
- Frank W9MKV
- reid@gold.bacs.indiana.edu
-