Such is usually a sign of a bad electrolytic in the audio output stage.
Replace C-304 (20 mfd) with a 22 mfd capacitor. That capacitor is from Pin-3
of V-14B (6GW8) to ground.
Glen, K9STH
Website: http://k9sth.net
From: RAY FRIESS <[email protected]>
To: boatanchors <[email protected]>; "[email protected]"
<[email protected]>
Sent: Friday, July 6, 2018 1:23 PM
Subject: [Boatanchors] Squeal
Heath SB101. When I turn audio gain up over one quarter of range, radio takes
off into a loud squeal. RF gain or mode settings make no difference.
Suggestions? Bad PCB ground maybe?
_______________________________________________
Boatanchors mailing list
[email protected]
https://puck.nether.net/mailman/listinfo/boatanchors
