Re: Motorboating
I have followed the reccomendations by member 'radioman'.
Look at the attached image. It is a modified version of the circuit I first posted.
I have managed to stabalise the amplifier by putting a resistor 'X in. The existing pentode grid resistor was left where it was. The thing doesn't motorboat now. The value is presently 2.2 Meg. I think further experimentation is warranted.
However I have been using the output from my turntable as a test signal.
What is the rated output of a Sonotone 9TA.
I would like to know if any of the TRF builders on the forum have measured the peak-to-peak signal output of the detector with a scope. I wondered how it compares to my test signal?
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