Quote:
Originally Posted by Jeffhs
Someone must have goofed on that IF frequency. Shouldn't it be 455 kHz?  Also, if this radio has push-pull audio output, shouldn't the tubes be identical, e. g. two 50C5s?
BTW, one of the knobs is mismatched; I don't know which one is still original. Someone must have lost one or the other and replaced it with one from the junk box. |
There's nothing in the rules, that say the IF frequency, has to be 455KC. I'm actually surprised that the IF is 262KC. I guess they used it to minimize images, the same way, they used 262KC in most car radios.
I still maintain, that the radio is highly engineered, to provide performance that exceeds the competitive makes.
Regarding the output stage, it is not push-pull, but designed to run on AC, as well as battery power, so that's the reason for the novel audio output stage. Zenith could have used that idea on their TO's, instead of the push-pull 1LB4's, that didn't sound, nearly as good.
One of the knobs, looks like a GE. The original knob, was either lost on broken.