|
These sets all use a low focus voltage CRT. The max focus voltage tap I think is around 400 volts. I just don't think they have as good of focus capabilities as the 5kv focus tubes.
The CTC-36 which uses one of these low focus voltage tubes does have a pot for focus adjustment.
One of the last sets made in 1974 using the tube type series string color chassis (CTC-66 maybe?) dispensed with the 3A3 and used a solid state tripler. This set uses a conventional high-voltage focus CRT.
|