[Joeztech]

Mondial;

You were exactly right, the phasing was positive instead of negative. Once I reversed the speaker connections and the feedback connections at the transformer secondary the oscillation went away. Just reversing the speaker leads eliminated the mid-frequency feedback oscillation but then I had low frequency motor-boating oscillation that varied with the tone control. Then reversing the connections of the end points of the resistive feedback network eliminated the motor-boating. The key was that just grounding the feedback lead to the volume/tone control stopped all oscillations. Now the radio is silent when it should be and I can go on with troubleshooting and alignment!

Joe