Polarity Issue During Low Voltage Circuit Testing:

[jminassin]

Moreplay Upgrade Polarity Issue During Low Voltage Circuit Test: I have 6.3 VDC on each of the tube sockets, but polarity is positive on both sockets. DMM is always connected red to red and black to black. The black and red wires reverse position at each of the two sockets. Red wire goes to plus at the pcb; black wire goes to negative for both sockets. Why don't I have negative voltage on one of the tube sockets?

John

 

[jminassin]

Moreplay Upgrade High Voltage Test: 6U/16U within spec. B+ Reg TP slightly high at
184.5 VDC. Mains voltage is 118.5 VAC.

Let me know if this is ok, and I will install the pots.

Thanks,

John