Quote:
Originally Posted by Electronic M
One of these (the latter version with SS H AFC diodes and a lot for H hold) was what got me started collecting. The later ones work better than the early ones, but they definitely aren't Zenith's.
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The little run had a change in the horiz phasing circuit. The early ones had a 5AN8 for an audio amplifier, penthod half and the triode half as the phase detector tube. The newer design has a 3AU6 as the audio amp and a set of diodes for the phase detectors. I don't remember the kind of diodes that was used.
