I received this unit on Saturday 1/9. Got a great deal on it and have wanted to go to tubes for some time. It was reported as having been removed from service and shipped. If I had a dime for every time I heard that. I tested all components and all measured in spec. The power supply and bias circuit have been upgraded. I found a toasty 15.6 ohm resister at V7 pin one to ground, but it tested on the nose. Poor connectivity at the connector and tube pin seems to be the cause of the heat. A new VTA board will eliminate this resister. I rounded the oblong connectors as best as I could to improve current flow, plugged in the tubes and crossed my fingers.
No source or load applied as yet. I just wanted to check for operation minus smoke. I will set the bias and see if there is sound.
Here is a pictorial of the amp. If anyone can ID the board I would appreciate it. The PO had no information on it.
No source or load applied as yet. I just wanted to check for operation minus smoke. I will set the bias and see if there is sound.
Here is a pictorial of the amp. If anyone can ID the board I would appreciate it. The PO had no information on it.