Problem with 5150 III 50 watter

[NUNOSLASH]

Hey dudes, i need advice about what might be wrong with my 5150 III 50 watter.
I bought it last march and used it with different cabs getting great results.
But since august, due to work and college i wasnt able to play it regularly.
This month i took it to a rehersal room that has a laney 4x12 cab with vintage 30s, which worked fine with the stock Carvin Head that came with it...but when i plugged the amp it sounded very muddy and fuzzy in the distortion channels.
The clean is ok ( i know it shares eqs with the 1st distortion channel) but the 2nd and 3rd channels sounded like if there was some cheap fuzz in the chain and kinda a little delay when playing palm mutes...
I was playing it with a les paul that has Seymour Duncan Crazy 8s humbuckers (alnico 8 magnets) and thought that might be the problem cause I altered the height of the pups, but then i tried it with a Washburn with Seymour Duncan JBs in the bridge... and that "fuzz" and muddyness was still there...

I want to know what could be the problem (i am taking it to a technician anyways) if its maybe a tube or something else. Or maybe sometime i just forgot to set the ohm values right and it caused some problem...

I hope i made myself clear and sorry for the lousy english writing!

Ill try to post some clips of the amp.

Thanks dudes

 

[jmh151]

Re: Problem with 5150 III 50 watter

Post your question on this bulletin board:

http://www.thegearpage.net/board/showthread.php?t=1052359&page=71

Howard Kaplan, the engineer that designed the amp, regularly reads the board, and quickly responds to most questions, including any problems anyone may have.

 

[kevlar3000]

Re: Problem with 5150 III 50 watter

As a start I would get electronics cleaner and clean all the jacks, inputs, and fx loop inputs, along with all the tube sockets. Make sure you have a good speaker cable, just in case. After that, I would try swapping pre tubes. I have had many an amp appear sick, only to have needed a simple cleaning.