Home Vintage Asylum

Classic gear from yesteryear; vintage audio standing the test of time.

Vintage amp hum

I have a vintage Yamaha CA 810 amp. It makes a buzzing noise I can hear in the headphones or speakers when there is no source. It's not consistent, sometimes I can make it stop. Currently there is no buzz with selector set to speakers off. If I move the selector to A or B or A+B it buzzes, slightly differently for each. SOMETIMES, I can move the muting switch to preamp off, or -20 and it will stop. Or If I move the volume to zero and back up a little it will stop. Once I move the selector to speakers off, it will stop, although in the past it has buzzed on this input too.

I have tried:
connecting the ground on the back to the ground port of an outlet.
removing the power strip it's connected to/ going straight into the outlet
good cleaning with de-oxit
removing all sources

no noticeable improvement from any of these. Any ideas?


This post is made possible by the generous support of people like you and our sponsors:
  Herbie's Audio Lab  


Topic - Vintage amp hum - filedog 17:01:26 01/05/15 (8)

FAQ

Post a Message!

Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Subject:
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.