Re: Homebrew Valve Tester
Hi Mike,
Your valve tester is a fantastic project and if you have no objections, I would like to build one for myself.
I wonder if you could clarify a few points on the circuit diagram for me. Please excuse my ignorance if these points are obvious and I have missed them!!
ZD11 & ZD12. Are these the same 15v types as in the anode voltage reg.?
In the anode voltage reg. should there not be a resistor to ground from the junction of ZD9 cathode and R5 to provide a ground reference?
What FSD/meter types did you use for the 3 panel meters? I gather the grid volts meter is DC volts but I'm not sure about the other 2.
What value is C10 (Across the grid volts pot)?
What type is D6?
I intend to wind a transformer to give all voltages required from one unit and also to use a multipole switch to select each of the common types of valve I use rather than the 9 switches like the AVO. My VCM163 will be resigned to the shelf now!!
Kind Regards
Howard
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