FerdinandII wrote:
Do you have a cheap set of speakers you could attach to the outputs? It might help you identify whether this is a low frequency or a high frequency oscillation. The culprits would be quite different, I imagine. If it's motor-boating for instance, that's something you would hear right away.
I will not hook up a speaker unless I know it is behaving. The tubes are running close to 200 mA of current through them and my 100W 8ohm resistor is too hot to handle. If it is high frequency, it will kill a tweeter. I am trying to just turn it on enough for momentary troubleshooting checking.
David