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Thanks for your thoughts on that alignment...
The set really does work very well and the last thing I want to do is make it worse by my own hand. Many of the coils in this set are disintegrating physically, especially the ones with a translucent core. Those are held together by a careful application of epoxy. I'm sure just attempting to move some of the cores... would be a bad idea!
As for the noise, I would say it "rides on top" of whatever the signal strength is.
I've tried isolation in the coax feed, twin lead cable, plugging everything into the same outlet. The usual things... it's not something that can be fine tuned out really, it is on top of wherever the tuning is. It's odd that some times it's worse than other times sometimes it's gone completely.
Regarding the I.F. injection, I have a Sencore VA48, so I can inject I.F. test signals from that but was thinking of a permanent solution - and improvement by bypassing the tuner and going directly into the chassis with the modulated IF from a DVD or other source. The Drake modulator, as an example is made to output IF at 45.75Mhz which seems right to go directly in to a Zenith chassis from 1967. Is that true?
Dave
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