Bottlehead Forum

Bottlehead Kits => Stereomour II => Topic started by: thoven0215 on May 15, 2022, 03:39:17 AM

Title: Screechy noise coming from left channel
Post by: thoven0215 on May 15, 2022, 03:39:17 AM

Yesterday all of a sudden there was a very erratic screeching noise coming from the amp. I tried swapping the tubes to no effect. The volume control doesn't do anything to the noise. What could be the issue here? Thank you.

Title: Re: Screechy noise coming from left channel
Post by: thoven0215 on May 15, 2022, 04:07:29 AM

After moving the tube a bit I noticed that it stopped, but any slight adjustment makes the noises come back. Should I just reflow the solder at the socket just to make sure everything is fine?

Title: Re: Screechy noise coming from left channel
Post by: Paul Joppa on May 15, 2022, 04:32:48 AM

If you haven't cleaned the tube pins yet, that might resolve the problem without getting  out the soldering iron.

Title: Re: Screechy noise coming from left channel
Post by: Paul Birkeland on May 15, 2022, 06:07:15 AM

You can also use needle nose pliers to slightly bend the 4 pin socket contacts closer together, though you didn't say which tube you had to bend to change the nature of the noise.  It's also possible you have a solder joint that isn't 100%, and moving the tube around is disturbing that joint.

Title: Re: Screechy noise coming from left channel
Post by: oztayls on September 20, 2023, 03:45:42 PM

I presume you sorted out your problem? Did you find the cause?