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JMP 50W V3 Voltages

Posted: Wed Jun 17, 2015 6:49 pm
by guitarist1977
Hi All,

I have completed a build of jump 50 watt, lead spec. Everything seems to be all right, however there is one thing that is not clear to me.

I measure voltages and all of them are in line with the voltage chart in the kit instructions, except for voltages on V3.

Chart shows that
V3 pin 1 = 208V and V3 pin 6 = 200V.

I measure
V3 pin 1 = 176V and V3 pin 6 = 170V

What could cause this discrepancy?

Thanks,
Alex.

Re: JMP 50W V3 Voltages

Posted: Thu Jun 18, 2015 12:58 pm
by guitarist1977
It was bad tube. Changed to a different one and everything was back to normal.