I owned a Belles 150a Hot Rod for a couple years and it hummed anytime my power supply was polluted by line noise from appliances, etc. This amp seems inordinately excited by such noise! Try to see if you can trace any correlation to lights, motors, etc. turning on. I talked to Dave Belles, the designer, about this issue. He more or less just shrugged it off with the observation that toroids are prone to buzzing & humming in certain circumstances.
My Belles 150 is buzzing when I turn it on..
Is this normal? I just bought this amp used from someone, and although I don't have speakers yet, I've tried turning it on and what I hear is a vibrating/buzzing noise right when I turn it on. The noise then gets quieter, but remains constant.
I don't think this is normal, but I want to check with you guys before I take this up w/the seller.
I don't think this is normal, but I want to check with you guys before I take this up w/the seller.