Meanwhile i found a bad (high resistance) hf transistor Q219, located in the amp. It is a MM4018, which is not available. Can I use a 2N5160?
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This is from the specs a similar type: PNP, 40V,hfe 10, ~400Mhz.?
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And I was wondering that the SINE amplitude calibration still passes, I thought it would use the amp and attenuator as well.
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Ralf??
Ralf Rosche