The first page of the service manual will show some examples of the 23 Ch radios or clones that I found that use this board so far. Most of them include a FCC ID tag stating 1125. They used sheet metal screws on the case halves and even three hidden ones behind the face plates that attach the bezel. If you find it necessary to clean and lubricate the volume and squelch pots, those plates will need to be removed carefully without damaging them. They are held in place with glue. The mounting nuts on the channel selector and the pots are found behind the plates. Also, the small openings on the front side of those pots were my only access to accommodate spraying. Fortunately case halves were never opened on the ASAHI that I restored. After careful removal I was able to reuse those same screws without using a larger size on typically striped out mounting holes. I always replace the bulbs with LED’s. On this radio, Red and green ones for the meter and a warm white one for the channel indicator. Since these radios conformed to a “backwards” 4 pin Midland jack, I converted it over to the Cobra standard. Replacing the bulbs plus rewiring mic jack made things a little easier by removing the bezel, but it was a challenge. By using the original bulbs wires, current limiting resistors were added at their beginnings, not at the LED’s.
After doing a complete electrolytic recap, heat sink compound refresh, and basic tune, two other small mods were done.
At least with the included stock ASHI mic, the modulation was a little low on this radio. There’s no modulation adjustment. To solve this issue I replaced the stock 5.6k resistor at C42 with a 4.8k. This brought a clean mod up to a little over 80%.
The volume on this radio started blasting too loud after being barely cracked open. Properly adjusting the AGC pot helped a little, but adding a 22k resistor in series on the end that’s opposite the ground end did the trick. It now has a nice range that’s not too touchy.
After doing a complete electrolytic recap, heat sink compound refresh, and basic tune, two other small mods were done.
At least with the included stock ASHI mic, the modulation was a little low on this radio. There’s no modulation adjustment. To solve this issue I replaced the stock 5.6k resistor at C42 with a 4.8k. This brought a clean mod up to a little over 80%.
The volume on this radio started blasting too loud after being barely cracked open. Properly adjusting the AGC pot helped a little, but adding a 22k resistor in series on the end that’s opposite the ground end did the trick. It now has a nice range that’s not too touchy.
