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Amp crackles when strummed: preamp or power tube issue?

wrxplayer

Silver Supporting Member
Messages
7,567
My Aiken's crackling a bit when strummed. If it's a tube issue, which tube/s are most likely the culprit?
 

Crowder

Dang Twangler
Silver Supporting Member
Messages
19,079
My Aiken's crackling a bit when strummed. If it's a tube issue, which tube/s are most likely the culprit?
Does it have the TRS effects loop? If so, some corrosion and/or static electricity can build up inside there and cause a tiny short, which can cause the crackling sound. It's easy to fix. Just get some electronic contact cleaner and spray it in the effects loop jack. You can sometimes clear it by inserting a mono 1/4" plug into the effects loop jack. IIRC this creates a solid connection between the parts of the jack where the static can build up.

If all else fails call Randall, he will get you fixed up.
 

sled

Member
Messages
732
Does it only crackle after it warmed up?

Does it sizzle?

Reseat all tubes

Exercise the input jacks and loop jacks
 

megatonic

Gold Supporting Member
Messages
2,744
How loud/faint is it?

A long shot could be that your pickups are picking up a crackle, caused by static charge/discharge from your hand rubbing our pickguard. Try moving your strumming hand the same way you do when you strum, only don't play the strings. See if you hear the sound trough your amp. (make sure your guitar volume is up).
 

gixxerrock

Member
Messages
3,929
If amp has an effects loop, plug in to the effects return and strum. This will bypass a bunch of preamp tube and tell you if the problem is in the front half of the amp.
 

Guitar Dave T

Member
Messages
10,785
Could be anything, even a loose screw on a transformer causing a grounding issue.

But try the power tubes first, then preamp tubes. They're the easiest thing to diagnose and fix, and probably 90% of amp problems are caused by tubes.
 

XmasTree

Member
Messages
3,959
my V22 does this on the clean clannel
...in fact, everyone's V22 does this on the clean channel
i'm pretty sure it's just the circuit not being able to handle a "hotter" signal
...it DOES NOT do this with single coils at all.
(i have all good tubes)

try using both single coil & humbuckers and see what it does....
 

lang.murphy

Member
Messages
3,582
Concur with "reseat all tubes" first. I had a loose rectifier cause noise issues, reseated it and all was good. If reseating doesn't fix it, time to swap tubes.
 






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