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Dekatron · 5th Dec 2020, 5:36 pm

If you mean that you got the 15mV across the red & brown connectors on the oscillator board, then it works ok, however you can't be sure that the output transformer is working unless you measure a signal across pin 4 & 5.

The signal comes from the oscillator board and is then passed through RV1, R28, R29, R30 & R31 and the mA/V rotary switch to the input of the amplifier board producing a signal that should make the meter move to the CAL position.

5th Dec 2020, 5:36 pm	#20
Dekatron Octode Join Date: May 2009 Location: Linkoping, Sweden Posts: 1,178	Re: VCM 163 problem while calibrating If you mean that you got the 15mV across the red & brown connectors on the oscillator board, then it works ok, however you can't be sure that the output transformer is working unless you measure a signal across pin 4 & 5. The signal comes from the oscillator board and is then passed through RV1, R28, R29, R30 & R31 and the mA/V rotary switch to the input of the amplifier board producing a signal that should make the meter move to the CAL position. __________________ Martin, Sweden