Quote:
Originally Posted by zeno
The sets probably were sold in a UHF area or maybe
were latter converted with kits.
Some places like Hartford Conn. were most UHF. Between
NYC, Providence & Boston there was only #3 & #8 left.
All the newer stations had to go on UHF.
So sets sold there usually had UHF tuners. In 1964 all
sets built to be sold in the US had to get UHF.
An interesting early UHF promo for Zenith UHF here.
https://www.youtube.com/watch?v=7lu5jqXaHRE
I will leave the ion trap to others. I know but its not my era
so I may get something wrong !
73 Zeno  |
Milwaukee has been a UHF town from early on, but I never saw a 9" GE or a 8" RCA with a UHF tuner. I know the 9T Ge was available with UHF, per the service manual. It used a small transformer to power the heater for the 6AF4, so it was probably factory.
BTW, if the ion trap was never moved, don't move it for now, until you establish reliable high voltage. If it has to be removed for disassembly, mark the trap and the CRT neck with a Sharpie marker so it can be replaced in the exact same position. Once the set is working well, you can try to adjust it for maximum brightness, but it might not be needed. Just a bit CW or CCW.