Tube Amp Archive

Welcome to the forum!! You may want to leave the filter caps alone while you are modding for the loop. More than likely your caps are still good... most Marshalls of that vintage still fine with the original filters. Are you having hum issues? If not, get the loop in there and functional before cha...

Thank you for the reply. It is very helpful!! I should have been more clear, when I say "right middle lug of switch", Im talking the metro loop toggle switch for bypassing the loop. Absolutely agree on the time to cleanup. While Im in there I was going to go ahead and replace the filter caps as well...

Getting ready to do a Metro Loop install. Used to be in electronic repair ions ago and worked plenty with a soldering iron. But it has been a while. And never worked on tube amps. It is an older 1987x prior to them coming with an effects loop. I looked at the metro loop install instructions and they...