Quote:
Originally Posted by Steve McVoy
The U70 has two IF amps, but no RF amp. The CT-100 doesn't have a UHF RF amp, and I don't know of any 50s tuner that had a UHF RF amp.
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I'll *guess* [until Old TV Nut laughs at what I'm about to write] that the crystal mixer doesn't work very linearly with high level UHF signals. Amplifying the incoming UHF might overload the crystal and cause it to make some weird
unintended harmonics that would show up as beat notes or moire on the
TV screen. Again, just a guess. [Running for the deepest corner of the basement...]
Cliff