Quote:
Originally Posted by bhegges
I am looking at building an all tube television and have some questions about the high voltage supply. In looking at some of the early designs a 1b3 diode was used in conjunction with a beam pentode oscillator. My understanding is that the beam pentode would feed a high frequency into the primary transformer winding and thus creating the high voltage secondary to feed the 1b3. I am thinking of using an oscilloscope tube and will probably need 2-6kv depending on the tube.
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I don't know your background but designing a TV from scratch is a big project. Oscilloscope tubes generally don't need much more than 2 KV anode voltage even with post deflection acceleration. It might be better deciding on the CRT tube first (what you can find), then designing from there.
Too high an anode voltage could cause problems such as focusing.