pittsburgh
Well-known member
I worked on my tube pre amp project last night and ran into some major problems. I Installed 1/4" jacks using the ground at J30 and J21, the hot is coming from J19 and J 50 through 10W 10 Ohm resistors. Before installing the jacks I was able to listen to audio without problems. After I installed the 1/4" jacks I heard the left channel start to crackle. The tube began to spark. I powered off and tried swapping tubes, but I got more smoke as a result.
I've not worked with tubes much. I'm wondering if I have a bad tube, they are at least 40 years old, if I have done something wrong with grounding audio outputs, or if something else has failed.
Thanks for the help.
-P
I've not worked with tubes much. I'm wondering if I have a bad tube, they are at least 40 years old, if I have done something wrong with grounding audio outputs, or if something else has failed.
Thanks for the help.
-P