JTM 45 40-18054 dual secondary voltage switch
Posted: Fri Aug 28, 2020 1:40 am
I’m in the middle of a jtm45 build and I would like to add a 3pdt standby switch to switch between PT secondary voltages. The PT I have is the classic tone 40-18054 with high and low voltages. I’m having trouble get the wiring correct because the SPST switch on the layout I have goes to the mains filter cap and pin 8 of the rectifier tube and the high voltage secondaries go to pin 4 and 6 of the rectifier tube. How do I get all this wired to the 3PDT switch? Also, I’m aware that I need an added bias resistor for the low voltage setting and I’m pretty sure I understand that part. Getting everything wired correctly to the switch is challenging me though and it would be so appreciated if anyone could help! I’ve searched through the forum too and found similar threads but unfortunately none of the links are available. Thanks in advance!