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Old 1st Dec 2020, 8:11 pm   #15
Dekatron
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Join Date: May 2009
Location: Linkoping, Sweden
Posts: 1,179
Default Re: VCM 163 problem while calibrating

I usually use BC549C for all transistors and then recalibrate the tester if necessary.

Did you check the voltage for the amplifer and oscillator to see that it has been properly smoothed by the electrolytic capacitors? They are a common fault as they dry out and don't smooth the voltage then.

Please check all wires and components so you have a chance to find the fault.
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