Ampeg SVT 4 T schematic??

[radionut999]

I've seen just about every Ampeg schematic here-- except the SVT 4 T. Does anyone by any chance have one? Also, has anyone else here had the unfortunate pleasure of working on one of these? The 4T I have on the bench is making a constant crackling/ woosh/ popping noise through BOTH channels. I have narrowed down to the preamp-- I plugged a guitar cable into each of the power amp inputs on the back and the issue goes away. It sounds like a cap or resistor getting noisy and I just need to do some signal tracing. I was just wondering if there were some common failure components in these amps.

Thanks!

[Jazz P Bass]

Ampeg SVT 400 T

Am I correct that it is a SVT 400 T?
Best bet is to call Loud Tech.
Have the serial number handy.

LOUD Technologies Inc. Corporate Office
16220 Wood-Red Road NE
Woodinville, WA 98072 USA

Tel: +1 425 892 6500
Tel: +1 866 858 LTEC (866 858 5832)
Fax: +1425 487 4337

[pecorporation]

[ATTACH]7726[/ATTACH]

[ATTACH]7727[/ATTACH]

[ATTACH]7728[/ATTACH]

These help?

[radionut999]

[ATTACH]7726[/ATTACH]

[ATTACH]7727[/ATTACH]

[ATTACH]7728[/ATTACH]

These help?

Hi pecorporation,

That schematic is for the SVT Pro or something. The Amp I have is the SVT 4 T, which is a 200 watt per channel. The preamp is different as well. Thanks for trying!

[radionut999]

Am I correct that it is a SVT 400 T?
Best bet is to call Loud Tech.
Have the serial number handy.

LOUD Technologies Inc. Corporate Office
16220 Wood-Red Road NE
Woodinville, WA 98072 USA

Tel: +1 425 892 6500
Tel: +1 866 858 LTEC (866 858 5832)
Fax: +1425 487 4337

Hi Jazz,

Thanks for the info, I'll call and see where it gets me.