Tube-saver (non-redplating) circuit
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martin manning
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- Joined: Sun Jul 06, 2008 12:43 am
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Re: Tube-saver (non-redplating) circuit
I like the idea, just wondering what you're thinking. The panel does take up a bit of real estate, and there would be a good number of leads to connect to the amp (eleven for a 4-tube output stage?). You could simplify it a bit by just doing left side-right side for two or four tubes, but monitoring each tube individually is reassuring.
Re: Tube-saver (non-redplating) circuit
Good idea, counting wires.
Each tube needs two wires, top of the cathode resistor and grid-leak bias point.
There needs to be a system ground reference.
The bias supply voltage needs to go to the circuit.
There will be two wires to the B+ shutoff device.
The circuit has to be powered; in this case, I'm using 6.3V isolated from the heater circuit, and making the circuit DC locally.
That's 14 wires for four tubes. You save four of those for only two tubes.
Each tube needs two wires, top of the cathode resistor and grid-leak bias point.
There needs to be a system ground reference.
The bias supply voltage needs to go to the circuit.
There will be two wires to the B+ shutoff device.
The circuit has to be powered; in this case, I'm using 6.3V isolated from the heater circuit, and making the circuit DC locally.
That's 14 wires for four tubes. You save four of those for only two tubes.