Stock 68 spec W/2"OT and such...

[Strat78]

I was messing with the sound level going into the amp from the computor (and then into a cab not the load box), tying to get the clean re_amp clip to distort like it dose when the guitar is actually plugged in. While sliding the volume up nearly all the way on the computer (it still was not distorting properly) poof, the 1amp fuse on the amp blew. So I replaced the fuse and plugged a real guitar in. Turning up the volume slowly on the amp there was nothing up untill 3, then I got a gravely tone, so then I turned it up to 5 and poof again. Something is very wrong here. Where do I begin looking for the problem?
ps. I don't smell anything burning from the chassis. Oh, and the amp had been burning in for five hours when I decided to start messing with it (because I am a moron).

[vanhalen5150]

I never really burned in my 68 from last year either. I've played the he'll out of it though. I get some pops a crackles out of it sometimes. I dunno?
Reading from Kevin C's TUT3 book, most heat produced from the OT is actually "induced heat" from the tubes. I think your safe there. Slow blow fuses right?

[Strat78]

I never really burned in my 68 from last year either. I've played the he'll out of it though. I get some pops a crackles out of it sometimes. I dunno?
Reading from Kevin C's TUT3 book, most heat produced from the OT is actually "induced heat" from the tubes. I think your safe there. Slow blow fuses right?

Could be a problem with the preamp pi filter, or I fried all my pre tubes (nos tungsram$$$ and sylvanias$$$$) Lesson learned here for sure.

[vanhalen5150]

Tubetramp 6CA7's? Oh boy..... .........$$$$$$$$$ Or just the preamps?

I guess putting in cheapo's for intial runs is the lesson learned here. That really sucks man!

[Strat78]

Tubetramp 6CA7's? Oh boy..... .........$$$$$$$$$ Or just the preamps?

I guess putting in cheapo's for intial runs is the lesson learned here. That really sucks man!

Looks like it might just be a pre amp tube and possibly a cap. It comes down to me not knowing how to properly use pro-tools and my mbox. I'll try to get a better re-amp clip that is recorded properly (for sharing too). I think pro tools and the mbox has features for this. Otherwise I'm really happy with the breakin proccess and will finish it up once I get the amp back on it's feet.

[vanhalen5150]

If I remember correctly George uses one of these I think.

http://www.radialeng.com/di-xamp.htm" onclick="window.open(this.href);return false;

[Strat78]

If I remember correctly George uses one of these I think.

http://www.radialeng.com/di-xamp.htm" onclick="window.open(this.href);return false;

That's kind of sick, think I'll grab one. Still, the ElevenRack has this feature built in I think, perhaps pro-tools/mbox does too.

[Strat78]

Oops, does not seem to be one of the 12ax7's, please don't let it be the tranny

[Strat78]

Now I really did it. The smell of burning rubber can't be good.

[vanhalen5150]

Code Red Meltdown?

It's the OT?

[Strat78]

I tied the amp with all different tubes and it worked fine. I put back in the EH's and it worked for about 30 seconds then there was an arc in socket v7. I pulled out the socket and it smells like a spent firework. Now that V7 is completely unwired, where is a good spot to safely drain the caps? Pin1 on v1 does not do it now that the heater wires etc are disconnected.

[vanhalen5150]

Just do the positive ends of all your big caps to ground individually. Should be fine. I do this all the time. You can check them with a meter afterwards to ground.. Some guys also do the negative ends as well but I dont think its needed. When I fuck with this stuff I always wear a glove on my left hand anyways. The meter should show any residual voltage left regardless.
Bad socket huh? At least its not the OT.

[vh junkie]

Heater's are AC... no caps to be discharged. What you need to worry about are the main filter caps. If the HT fuse blew, the mains caps will have no discharge path. Check them...

[vanhalen5150]

I think he has everything there disconnected. Could just be a bad socket?

[Strat78]

no discharge path. Check them...

I think shock therapy might have worked this time, but I'm still an idiot If I vanish forum this forum, more than likely I'll have turned myself into a charcool bricket.