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Yes, I just got into trouble with this the other night. It's because the 1 ohm resistor on those test jacks is not exactly 1 ohm. Even 10 percent off will lead to the inconsistency you are noticing. My Bassman has 465 VDC B+. It runs 6L6GC's. The resistors measure .9 ohms. I thought I'd just...

The preamp tubes are cathode biased. The cathode resistor sets their operating point. So plug and play. For the output tubes hopefully there is a 1 ohm resistor from pin 8 (cathode) to ground. You measure the DC voltage (in millivolts) across the resistor and that translates to how much current...

Changing preamp tubes doesn't affect the output tube bias. It's not a bad idea to check the bias even when you aren't changing output tubes. Did he add those banana plug test jacks on the back panel of your amp?

What is so bad about the diagrams you have already been given? That Fender drawing is nicely drawn. Get out the crayons and add the color codes if you need to. I'm guessing that the problem is that you want 2 volume pots, and a 5-way switch with some coil splitting? In that case, try some dual...

PABLO GILBERTO! :D

The heaters should be ready in 1 minute. If you put in a new set and the bias is way off it could damage them in seconds after throwing the standby. So you would make sure its close right away. Then leave it on and make sure it stays in range.

The Kemper D.I.is plenty clean to trust and use. But, everyone should have a nice D.I. like the Radial. Lots of uses like bass, keys, acoustics. I'd rather not split the signal before the amp if plugging straight in. If you have pedals or a buffer in front then not as big of deal splitting...

I have a non powered lunchbox. We could get a few hours of rehearsal space and crank it up. I usually just turn the cab button off and run through a 5W champ and a Marshall cab and it sounds really good.

Ceriatone Son of Yeti and an AX8 and you still have enough left for a Les Paul.

Actually these are a better choice. http://www.harborfreight.com/4-piece-pi ... 66836.html

You just push the two half round connectors inside the socket together a little with a scratch awl until they feel snug again . http://www.harborfreight.com/4-inch-scr ... -7497.html I have this steel base plate tool for straightening the pins of the tubes. It's only for 9 and 7 pin preamp...

It's not hard to play the 6 string songs on the 7. In in band situation it really adds to the overall sound. We used to have one guitar playing a low part and the other an octave higher and it was massive. The biggest problem was accidentally playing a low B sour note on a chord that it doesn't...

The transformer specs do matter. The input impedance of the output transformer may not be a good match for a different type of tube. The power transformer winding ratings both B+ and heater should be considered. Putting KT-88's in a 6L6 amp will add a few amps to the the heater demand and can...

Never seen one, only Kahlers. You would have to make a few rectangular plugs to fill the holes. and clean the existing routes. A milling machine is probably required. You could potentially cast in aluminum or lead. --Or carbon fiber layers :D

I listened to this album for like 2 years straight. I remember hearing that it was all a JMP-1 for the preamp.

Yes, that should be fine. You will want something that has similar lead spacing. I doubt it is even seeing any high voltage with that small of a value cap. Silver mica might be a better way to go. I've heard a lot lately about ceramics not being the best choice for audio.

The DIY pedal forums were building a bunch of 12AU7 boost pedals. Search for Valve Caster.

The hole is probably already the right size. I would stick with the Schallers for that. If you have to enlarge the holes, use a long skinny reamer. The drill motor could leave some bad tearout.

The 1324 variation to what you are doing is a good one. I like to do the bend exercises where you fret the note first then bend up to it.

If it was pulled from another amp it should be fine. You could check the current rating. Replacements for a Fender Twin are rated at 90ma FWIW. Not too sure about what different Henry values will do, probably just make the power supply sag feel a little different.