Quote:
Originally Posted by DaveWM
oh my yes, I missed that. I wonder if all the little ferrite beads are in place etc. on the filament leads? My later zenith (24MC32) has several IIRC on the IF filaments. Mine also has a 22k resistor across the secondary of the IF before the 3rd IF tube. Wonder if maybe that has drifted high? I assume its there to damp out oscillation.
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My first two IF stages filaments have a ferrite bead, as well as a couple more beads in the filaments some color circuit tubes. I did check and replace out of tolerance resistors in the IF stages, being careful to match lead dress as close to original as possible.