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Old 1st Dec 2020, 12:27 pm   #11
HBWOODY
Pentode
 
Join Date: Mar 2020
Location: Bodmin, Cornwall, UK.
Posts: 147
Default Re: VCM 163 problem while calibrating

Replaced diodes D1 and D2 and transistors VT2 and VT3 on the amplifier board. On switching on the needle on the mA/V meter rose to near the CAL mark. When switching from the CAL position on the mA/V switch the needle on the meter does not drop to the zero point , it goes no lower than the 1.5 mark (1/4 scale). What does this mean?
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