I just took delivery of a totallt different $50k amp that had a hum in one channel. After switiching power cable. interconnects, speaker cables and some tubes it was still there. Similar to above it was a loose grounding wire.
I also hada hum with an old Raven. I called Dave T and he walked me through it. It was simply a bad tube which can happen. It is very easy to test to see if you have a bad tube. However, it does require you to have another similar tube.
Call Dave --- he is the brains behind the amp and he will take care of you.
I also hada hum with an old Raven. I called Dave T and he walked me through it. It was simply a bad tube which can happen. It is very easy to test to see if you have a bad tube. However, it does require you to have another similar tube.
Call Dave --- he is the brains behind the amp and he will take care of you.