> >Still don't understand why probing with a 10Meg, 1pF load kills the > >oscillation stone dead until the next power cycle. > > That says that the circuit had just enough gain and positive feed back to > oscillate but just barely. I'd have to see the circuit to > recommend changes. > The root cause is probably lost gain in the tube but that can be > compensated > for.
How's the filament voltage at the 7587 socket, by the way? A shorted turn in your power transformer might account for some lack of enthusiasm on the Nuvistor's part. -- john, KE5FX _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
