[B]Noisy rectifier tube...never knew it could happen[/B]

[toneseeker74]

I have been trying to diagnose the source of a metallic buzzing/ringing in my amp for months. Checked for microphonic preamp and power tubes. Tightened all bolts. Tonight I finally decided to tap on the rectifier tube, and there it was plain as day.

[TwilightOdyssey]

Re: Noisy rectifier tube...never knew it could happen

I had a similar issue with one of my amps, where it would make a sound like shaking a dead incandescent light bulb on powering on ... took a bit of looking round and finally I swapped out the rectifier valve on a whim, and that was the issue!

[toneseeker74]

Re: Noisy rectifier tube...never knew it could happen

Now I have to figure out a similar sounding problem in my Traynor YBA-1. Solid state rectifer. Doesn't seem to be preamp or power tubes. Unless I overheated the voice coils of all four of my speakers, I don't have an obvious place to start. Solder joints look good. Guess it's time to dig deeper.

[STRATDELUXER97]

Re: Noisy rectifier tube...never knew it could happen

What manufacture of that rectifier tube so I Know what to stay away from in the future...5U4,5AR4? Still using an 5AR4 Mullard in my BF Fender..Has been in this amp since 89..