Video of 5150-III effects loop noise. Amp experts, what the hell is this noise???

[romanianreaper]

When I hit the effects button I get Delta Airlines Flight 545 st 30,000 feet noise and have no idea what causes this. Any ideas? It is only when I turn on the effects loop:

 

[crwnedblasphemy]

What is in your loop?

 

[Racerxrated]

Try changing the tube that powers the loop.

 

[romanianreaper]

What is in your loop?

I have a bunch of pedals in there but even without the pedals, it makes that noise which is weird.

 

[romanianreaper]

Try changing the tube that powers the loop.

This amp doesn't have one of those, only the 100 watt.

 

[glpg80]

Sounds like typical white noise to me?

If you do a loop back cable on the effects loop does it still have noise? What if you enable and disable it with nothing plugged in at all?

 

[motorboy1]

Sounds like Bogners 3534 loop. White noise. I had a 5153 50 watt and the loop was quiet. This noise isn’t normal. Try just a short patch cable in loop and see what happens.

 

[romanianreaper]

Sounds like typical white noise to me?

If you do a loop back cable on the effects loop does it still have noise? What if you enable and disable it with nothing plugged in at all?

Yeah I did that tonight with the loop back and nothing plugged in and still did it. The video doesn't do justice on how loud it is. Even clean channel it sounds like turning on a hair dryer or something when loop is engaged.

 

[romanianreaper]

Sounds like Bogners 3534 loop. White noise. I had a 5153 50 watt and the loop was quiet. This noise isn’t normal. Try just a short patch cable in loop and see what happens.

I did that and still there. It is weird though because I haven't had that noise in the amp for a while. Wonder if something is jiggling loose.

Would preamp tubes do this?

 

[romanianreaper]

Saw someone else had a similar noise:

 

[romanianreaper]

Another example

 

[romanianreaper]

Bump for more insight

 

[glpg80]

I did that and still there. It is weird though because I haven't had that noise in the amp for a while. Wonder if something is jiggling loose.

Would preamp tubes do this?

So it happened, didn’t happen for a while, and is happening again?

Have you changed any of the pedals since then?

Have you replaced all of your cables? I’ve heard a bad cable cause this before - likely due to a bad ground solder.

 

[romanianreaper]

So it happened, didn’t happen for a while, and is happening again?

Have you changed any of the pedals since then?

Have you replaced all of your cables? I’ve heard a bad cable cause this before - likely due to a bad ground solder.

It's funny you said that because I had forgot that happened. As far as the cables, it doesn't matter what cables I use and even when no pedals are plugged in, or one, or all, it happens.

I feel like maybe something is loose in there like you mentioned, and when I move the amp from time to time, it brings back the noise.

Eventually I'm going to get a EVH 5150-III 6L6 Stealth I'm reluctant to go grab a bunch of new tubes and it not help at all.