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Author Topic: tube amplifier resonace tuning question  (Read 465 times)
AK0B
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Posts: 269




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« on: November 16, 2017, 06:22:08 AM »

I seem to remember that to ensure the stability of an amplifier/oscillator you should not set the variable capacitor in a tube circuit at exactly resonance but to back it off a degree or two.  My question is if true, should it be backed off for slightly less capacitance or slightly more capacitance?

Stan AK0B

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K1ZJH
Member

Posts: 3325




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« Reply #1 on: November 16, 2017, 02:26:55 PM »

That was for overtone crystal oscillators and was done for reliable starting.

Pete
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