Due to the combination of parts I have on hand and on order, I'm considering using a hybrid bridge rectifier using SS diodes and the uncommon 12Z3 tubes. (12Z3 data sheet)
The PT is rated for 325mA@243Vrms (no CT available). I'm only going to be pulling a constant 140mA, so I expect my loaded voltage to be at least in the 260-270 range.
The datasheet says PIV is 700, but max plate voltage is 235Vrms (330Vpk). It also says max steady-state current is 330mA, but max output current is 55mA. Oh, and it gives a rating for max voltage drop at 110mA. And then the drop curves go up to 185mA.
So which of these maximums actually apply in my situation? I'd like to feed them around 260-270V, pulling about 140mA through a hybrid bridge to a capacitor input. Am I abusing them? If so, am I asking for fun fireworks, or just shorter tube life?
The PT is rated for 325mA@243Vrms (no CT available). I'm only going to be pulling a constant 140mA, so I expect my loaded voltage to be at least in the 260-270 range.
The datasheet says PIV is 700, but max plate voltage is 235Vrms (330Vpk). It also says max steady-state current is 330mA, but max output current is 55mA. Oh, and it gives a rating for max voltage drop at 110mA. And then the drop curves go up to 185mA.
So which of these maximums actually apply in my situation? I'd like to feed them around 260-270V, pulling about 140mA through a hybrid bridge to a capacitor input. Am I abusing them? If so, am I asking for fun fireworks, or just shorter tube life?
The 12Z3 is a low voltage rectifier. 235volts absolute maximum and 330mA PEAK not RMS.
I would say it was not suitable.
I would say it was not suitable.
Yes Sylvania has its working plate voltage as 150V at 55ma,
PIV refers to the maximum voltage a diode can withstand in the reverse direction without breaking down. its always much higher than its working voltage.
PIV refers to the maximum voltage a diode can withstand in the reverse direction without breaking down. its always much higher than its working voltage.