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Manley Amp is humming - troubleshoot :(

Hello all ...I have been chasing a gremlin on the left side of my system for about a year . Last night my Left side was completely distorted at lower volume and after that just turned into loud humming....

Manley Snappers
Manley Jumbo Shrimp Pre amp
Klark Teknik DN360 EQ
Source was Macbook Pro

So i switched the amps to see if the hum would follow the amp & it did ....even with everything off except amp... super loud low end hum ...like a grounding issue...changed all tubes 3 times , still hums ...any clues before I send it in?

thanks !

tommypenngotti

Showing 1 response by oldhvymec

oldhvymec
5,101 posts
 
Yikes! Other than a quick peak inside. You’ll probably see something..

UNPLUG first, remove the valves and flip it over..

Just be careful, don’t be touching things if you don’t know how to discharge the caps.. LOL Can get a little noisy.. discharging sometimes..

LOOK.. you’ll see something wrong I bet.. Maybe something loose.

A wooden dowel is easy to use and see if things are tight.. Be careful with pencils graphite is very conductive.. LOL fun to watch though..

Doesn’t cost to look..

Regards
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