04-17-2019, 09:08 AM
Welcome! Are the cathodes running at a positive voltage giving a net negative voltage on the grids? Would have to look at the schematic to see how they are biased.
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Philco 87 grid voltages
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Messages In This Thread
Philco 87 grid voltages - by HooiserScootrer - 04-17-2019, 07:06 AM
RE: Philco 87 grid voltages - by rfeenstra - 04-17-2019, 09:08 AM
RE: Philco 87 grid voltages - by Radioroslyn - 04-17-2019, 09:39 AM
RE: Philco 87 grid voltages - by HooiserScootrer - 04-17-2019, 07:02 PM
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