DrewNK Posted April 18, 2022 Share Posted April 18, 2022 Just got an old Gibson Ga-50 Amp from my grampa with two 6l6g tunes one 5v4g rectifier and two 6sj7 with two 6j5 preamp tunes. The Amp only makes a loud humming sound. Any idea how I can fix this up or any info at all would be great . Do I have to bias the tube replacements ? Are there any more reliable modern replacements I can use ? The thing is old as super dusty. Thanks Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.