01-08-2015, 10:06 AM
Thought you might like to know, I have finished rebuilding the vibrator power supply for this radio. It seems to be working perfectly. 154 volts output under load. Looking at the output of the second filter cap, the DC is quite clean, just 0.2V of ripple/noise.
Ended up having to repair the antenna input coil. The radio was working, but the antenna trimmer had no effect, and touching the grid cap on the mixer resulted in huge amounts of hum. This put me on the trail of the open coil. Repaired that and now the trimmer works fine, reception is good.
Still need to replace the isolation grommets on the tuner sled, and do some repairs to the cabinet. I will also likely try to do some scrubbing on the chassis to clean it up. I will post pics as I complete the work.
Ended up having to repair the antenna input coil. The radio was working, but the antenna trimmer had no effect, and touching the grid cap on the mixer resulted in huge amounts of hum. This put me on the trail of the open coil. Repaired that and now the trimmer works fine, reception is good.
Still need to replace the isolation grommets on the tuner sled, and do some repairs to the cabinet. I will also likely try to do some scrubbing on the chassis to clean it up. I will post pics as I complete the work.
