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I love the 6L6WGC-STR TAD tube. That's all I use here unless someone requests something else. I really like the SED/Winged C too. I've been using them for 3 or 4 years now and love them. Jerry

There is nothing wrong with the DSL/TSL transformers. If the output transformer failed it was caused by something else. If someone has a DSL/TSL that has repeated failures it likely means the "tech" didn't fix what caused the first failure. As 94 Tremoverb mentioned, the 16 ohm jack is usually...

When a cap shorts and takes the power transformer or choke out with it you won't think him not changing the caps was doing you much of a favor. Electrolytic caps have a life expectency for a reason. It's not something any tech made up, the manufacturer does. 10-15 years is the time to start...

Changing the output transformer will not increase gain. The amp in that video didn't have a Mercury transformer. I don't use Mercury very often here. I use Heyboer and several other US made transformers. Mercury are very nice, but over priced and not always the tone people are looking for. A...

My mods aren't one size fits all take it or leave it mods, they are custom to what each player asks for. My standard mod has a base I work from that comes from the most requested changes that I get for each particular model, but totally tweaked as needed. If you look at some of the descriptions...

Thank you so much! Maybe I can save this beast now. Jerry

Still looking for pics if anyone can help a brother out. :) Jerry

Your amp doesn't appear to have the loop mod, but some better pics would be awesome. Who knows they might help me out with it. Thank you! Jerry

From what I can tell the loop mod changes the IIB loop to be more like the IIC loop. I haven't found any pics yet so I'm still working on it. Jerry

I have a MK IIB here that someone butchered and I'm trying to put it back to stock. I talked to Mike Bendinelli and the amp has the effects loop mod which I would like to keep in the amp, but Mesa won't give up the schematic for the mod. I have a basic idea of what he did, but some pics would...

Running a speaker load that is higher than the amp is looking for (16 ohm cab, 8 ohm jack on amp) can cause flyback voltages which take out power tubes, rectifier tubes, tube sockets, and output transformers. This is especially bad at high volume levels when pushing a distorted signal. I have...

How are you measuring the pots? Mesa doesn't use a 400K pot. The pot you took out was a 100K and the pot you installed was a 25K. Channel 2 on that amp uses the 25K for the presence control. Changing the pot really shouldn't have done anything you couldn't have done by adjusting the pot. Jerry

Don't just throw parts and tubes at it unless you know they're bad. Pull out the rectifier tubes and set the rectifier switch to solid state. Power it up and see if it blows the fuse. If it blows the fuse like that then try another set of power tubes while leaving the rectifier tubes out and...

Look at the rectifier tubes too, they fail quite often. Jerry

Two things to look at on older 2 channel rectifiers. One is the resistor in the switching power supply R503. That resistor can heat up and burn itself off the circuit board causing problems. I've seen this resistor burnt on several 2 channel rectifiers I've had come thru the shop. The other...

I'll try to find out next time they stop over. Jerry

Thanks guys. I think they did use Mesa a while back. I know they used 5150 a lot and then switched to Line 6 when they got back together. They are talking about going back to 5150's. Eric was just here getting his guitars setup before they started this tour and he was talking about wanting a...

Earth Crisis doesn't use Mesa. Live they play Line 6. For their new CD that just came out they used my modded JCM800 and my modded 5150. Jerry