4/2/2023 0 Comments Plate transformer for sale![]() ![]() One of them provides only 2200 Volts DC from the HV. There are two JB2000 transformers that I know of. (been a looong time since I have had my probes in one of those) PS: He also noted that the Plate Voltage was around 2200vdc, which on an SB220 transformer would be the low CW tap, the SSB position should be closer to 3000vdc.(+/-) Think the old JB2000 transformer should have been similar. Hard to tell from the partial picture, maybe he will post further pictures, Does the picture also seem to show the output coax attached to the end of the tank coil (?) maybe a P-L net? ![]() Hard to say since I am guessing this a partially disassembled project. The cooling fan looks to be a way too far away from the tube to give good pressure around the glass and socket base unless there is a shroud missing to focus the air across the tube and under the socket. Not sure why this is eating transformers. Interesting since either of those should have been adequate to run a Single with headroom to spare. He said this is the 3rd transformer in this amplifier(SB220 first and JB2000 last) both of which went up in smoke. I thought he said this was a single tube 3-500z? The partial picture of the RF deck looks like a single tuber. ![]()
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