Hello I am building the 12AX7 vacuum tube amplifier, but I have run into some problems with the power supply. I purchased 3 of the transformers listed in the parts list, and have built the circuit as shown in the article ( I think ). I never seem to get the correct voltage on the other side of the transformer(s) ( I tried all three of them) I actually dont get ANY measurable DC voltage and I thought I would see 170 VDC.
I am connecting my 12V power supply leads to the yellow wires on the DC side of the transformer ( 6.3V x 2 ) and checking the other side for voltage....nothing.
Also, I have tested the transformer in the tradional way and hooked up the AC leads to wall voltage and read corrrect DC voltage ( 12V ) off of the DC side, so I at least kindof understand transformers , right?
Can someone give me some pointers or tests I can do to eliminate this issue or component?
thanks
Dave
I am connecting my 12V power supply leads to the yellow wires on the DC side of the transformer ( 6.3V x 2 ) and checking the other side for voltage....nothing.
Also, I have tested the transformer in the tradional way and hooked up the AC leads to wall voltage and read corrrect DC voltage ( 12V ) off of the DC side, so I at least kindof understand transformers , right?
Can someone give me some pointers or tests I can do to eliminate this issue or component?
thanks
Dave