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Still sooooo off
Transistor replaced, but still way off. Core adjusts from 14khz to 25khz.
Voltage makes only a slight difference, handling makes only a very slight difference. Measuring using loose coupled with a scope and generator to zero-beat or loose sampled with a freq counter results are the same.
I'm begining to feel strongly that the Sams info is not correct. Hope there is someone with RCA factory info that will prove one way or the other.
This device seems to "want" to work in this range no matter what I try with it.
I know crystal microphones deteriorate with age and humidity, could this transducer be doing likwise? It is in paralell with the tuning method.
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