Feedback problem with 2nd Gen. Model T??

[stockcar1414]

Hey everyone,

I play a Gibson Les Paul Studio through a 2nd Gen Model T running through an Orange 4x12.  Lately, I've been having feedback problems with my setup and i'm not really sure what's up.  When plugging the guitar directly into the cab and playing through the normal channel, I get a high pitched whine that comes through when i play chords or sustain notes.

Here are my settings:

Master: 3 1/2
Presence: 4
Treble: 8
Mid: 4
Bass: 4 1/2
Channel Vol: 2

Also, the tone knobs on my guitar are turned all the way up.  When I play through the amp with my Fender Tele, the squeal is still there but not nearly as bad....I'm pretty much a novice when it comes to dialing in tones, so I'm thinking that my settings might just be off and not well balanced enough.  I play mainly lead stuff so I like my tone to be on the trebly side, and also a lot of dist...interestingly, when i plug into my modded DS-1 I get a lot more feedback than when I plug into the Brite channel and dial in my dist.  I prefer the pedal though as it gives me pretty much the same sound and also allows me to switch back to clean for gigs. 

My bridge pickup is also raised pretty high on my Gibson, so I was thinking maybe that could be contributing.  Oh, and I also play my guitar on only the bridge pickup as it gets too muddy for my liking when I have both on.

Any suggestions would be greatly appreciated and let me know what other info you need if this isn't enough to get a general idea

thanks!

[djc]

I would have suggested it's your pickups until you used another guitar and it did the same thing.  take the amp to a good tech and tell him what is going on.  there is lots of tubes and capacitors in the signal path and any of those could cause the microphonics (i think it's called) you describe.

[Novella]

sounds like bad preamp tubes to me

[stockcar1414]

ok awesome, that's not a bad fix at all then.

Yeah, i thought i was my guitar at first but when I plugged in my buddy's yamaha head, i didn't get that squeal at all, and i plugged in my gibson lp, and epiphone  lp, and a fender tele and they all did the squeal through my amp.