02-25-2014, 01:36 PM
I just finished recapping a 38-620. The radio is working fine and it sounds great. The only problem is when I try to tune below 650. From 650 - 550 I get loud noise while tuning. It only happens when I am moving the dial, not when it is still. In other words, as I am moving the dial from 650 to 550, the noise is loud. But if I stop, say at 600, the noise stops too and any station at the freq will play fine. The noise sounds like someone blowing into a microphone. The noise is not affected by the volume control - it is extremely loud even if the volume is down.
I initially suspected the tuning cap had some dirt, or possibly a bent plate, but everything looks good. I sprayed it down with contact cleaner and blew it out with canned air. No help.
Any ideas?
Schematic - http://www.nostalgiaair.org/PagesByModel...013254.pdf
I initially suspected the tuning cap had some dirt, or possibly a bent plate, but everything looks good. I sprayed it down with contact cleaner and blew it out with canned air. No help.
Any ideas?
Schematic - http://www.nostalgiaair.org/PagesByModel...013254.pdf
The artist formerly known as Puhpow! 8)
