Thanks for all the pointers. I was on-site today.
- Electric outlet is wired correctly, according to the receptacle tester.
- A normal page is understandable, but you can hear a distinct distortion.
- Input level setting is at normal setting, where it has been for years.
- Monitoring with a butt set on the input to the amp, amp disconnected, sounds very clear.
- Monitoring on input, with amp connected and still clear.
- Monitoring on output of the amp, while idle, and I can hear a small amount of hum. Same hum on the horns if it's quiet in the shop.
- Monitoring on output of the amp, with the cable to the horns disconnected, and the hum gets much louder.
So, I'm thinking there is something in the amp going bad? It's a Bogen TU-35.
Thanks.
Jim
