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In Reply to: RE: Questions about tetrodes for specialists posted by Aldovan on December 01, 2016 at 13:20:53
with a 500K Rp I would expect that behavior even driving a scope probe.
dave
Follow Ups:
The Rp of the tube is in parallel with a 55K anode resistor. Even if the probe was as high as 20pF, the 1kHz - 20kHz delta should only be about 0.15 dB.
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Buy Chinese. Bury freedom.
Ahhh... that changes things. I don't see the schematic..... just get a broken link.
so the next question becomes what exactly is the OP trying to drive and since I cannot see the schematic how is he trying to drive it?
dave
Right, there are a lot of unanswered questions. I highly suspect this all has something to do with the measurement procedure and/or test equipment.
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Buy Chinese. Bury freedom.
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