Tommy III crackle sound

T

TillMack

Well-known member
hey guys,
build my Tommy III today.
I already record with it and everything worked and sounded fantastic.
Then I leave my recording studio and the Tommy III was still on.
After I plug the guitar in again, I got a crackle sound, like a battery is dying.
Any suggestions? Visual everything looks perfekt.
 
Solution
T
Thanks for all your help guys. Found the mistake. After checking every part and solder joint again, there was only one part which took my interest.
The IC. Normally I heard broken IC's in another spectrum, like squealing noises etc.
Changed the IC and now everything work. Had to wait for some days, cause I only had one LM1458 (which unfortunately get broken).
I'm happy so far.
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TillMack said:
hey guys,
build my Tommy III today.
I already record with it and everything worked and sounded fantastic.
Then I leave my recording studio and the Tommy III was still on.
After I plug the guitar in again, I got a crackle sound, like a battery is dying.
Any suggestions? Visual everything looks perfekt.
Click to expand...
Sounds like a ground, could be anything, though. Did you just finish building it or has it been built for a while?
 
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I finished it today. Used it for 3 hours without any problems, after that I changed the guitar to record again, then I got crackle sound.
The pedal is connected to a wallet. Every other pedal work. Also changed the guitars and cable. With my known working pedals everything is great, just the Tommy makes problems. I would also change the IC to check, but I don't have any LM1458 by hand right now.
As I said, visually everything looks good.
 
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TillMack said:
I finished it today. Used it for 3 hours without any problems, after that I changed the guitar to record again, then I got crackle sound.
The pedal is connected to a wallet. Every other pedal work. Also changed the guitars and cable. With my known working pedals everything is great, just the Tommy makes problems. I would also change the IC to check, but I don't have any LM1458 by hand right now.
As I said, visually everything looks good.
Click to expand...
Solder joints cooled down and one of them needs to be reflowed. That’s my initial guess.
 
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all pots have dust seals … I measure all ground spots with my multimeter and all looks good measurewise. Strange. What I wonder is, that I could record for 3 hours without any problems.
 
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TillMack said:
all pots have dust seals … I measure all ground spots with my multimeter and all looks good measurewise. Strange. What I wonder is, that I could record for 3 hours without any problems.
Click to expand...
When the solder joints cool off, they shrink. We’ve all been there, it’s terribly frustrating.
 
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Thanks for all your help guys. Found the mistake. After checking every part and solder joint again, there was only one part which took my interest.
The IC. Normally I heard broken IC's in another spectrum, like squealing noises etc.
Changed the IC and now everything work. Had to wait for some days, cause I only had one LM1458 (which unfortunately get broken).
I'm happy so far.
 
Upvote 0 Downvote
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