Quote:
Originally Posted by dieseljeep
It was very common in our area to see a Zenith like that to be equipped with a UHF strip, as many of them had Standard Coil tuners. The UHF kit was easy to install and worked perfectly. It had separate contacts for the UHF antenna, not like the earlier tuners that could use strips, but used the same antenna connections.
The GVG tuner equipped sets always had a continuous UHF tuner. I don't remember UHF strips available for the GVG tuner.
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Never noticed but the GVG & SGVG tuners were on "better" sets. Also
the other tuners then probably were not UHF tuner ready. For those that
may not know when you switch to UHF on click tuners you...
1) turn off the VHF osc
2) switch in tuning to make the mixer & RF amp 2 more stages of IF
3) turn on the UHF B+
On UHF you can inject an IF signal into the UHF IF jack to test the VHF
tuner for proper ops on UHF. It was quite common in a Zenith to have
NO or grainy UHF caused by a bad 6HA5. Never made sense for a tube
to run normal at high freqs but not lows !
Here is a great propaganda film from Zenith on early UHF
https://www.youtube.com/watch?v=7lu5jqXaHRE
73 Zeno
LFOD !