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

[vanhalen5150]

Strat78, your CM 12000 PT has color code like this correct?

The primary:
ORANGE= NEUTRAL
WHITE/red stripe = 100V Japan
RED= 120V
BROWN= 220V
BLUE= 230V
PURPLE= 240V

SECONDARY:
THICK BLACK wires= 6.3V Heaters
THICK GREEN WIRE= Center-Tap for Heaters goes to ground...
BLACK and BLUE wires= High Voltage goes to diodes or stand-by ....
YELLOW= High Voltage Center-Tap ...goes between the first set of filter caps..
WHITE= bias
GREEN = ground for bias winding

[Strat78]

This is what I have, I think it is the same.
The T2562 wire color codes...

PRIMARY:
ORANGE = common nuetral
WHITE/red = 100V Japan...
RED= 120V
BROWN= 220V
BLUE = 230V
PURPLE = 240V

SECONDARY:
Black & Blue= High Voltage to diodes or stand-by....
Yellow = High Voltage Center-Tap....connect between first group of caps...
Thick BLACK wire = Heaters
Green wires go to ground...
White = bias

Pick up a set of EH 6ca7's, and some NOS 12ax7 if you have not already. I've got the 32up pi filter right now and it is a little loose on the low end but still it is tighter than the metro kit. Maybe I'll try a 64uf then perhaps the 100uf. Something very cool about this build though it is a tone that is not friendly at all. Total Marshall!!! -A little stiff and harsh but I think that will get better as it burns in.
http://youtu.be/VGNwXq6vPoI

[vanhalen5150]

I do. I got EH6ca7's. NOS Ratheon and Nos Sylvania 12ax7's from Tubetramp. I have 16, 32, 50 and 100 to rey in the PI. Nos Mustards, Lemco's etc. I have a number of singles to try out in v1.
I also have Preamp and power(El34's) from Mesa Boogie to mess around with.

Don't you find that 100v(Japan) tap interesting though? Was that on original 12000 T2562 trannies?

[Strat78]

I do. I got EH6ca7's. NOS Raleon and Nos Sylvania 12ax7's from Tubetramp. I have 16, 32, 50 and 100 to rey in the PI. Nos Mustards, Lemco's etc. I have a number of singles to try out in v1.
I also have Preamp and power(El34's) from Mesa Boogie to mess around with.

Don't you find that 100v(Japan) tap interesting though? Was that on original 12000 T2562 trannies?

Yeah, that's kind of novel. Are you going with the old style grid stoppers? Here is CM's 2" core OT wire code in case anybody needs it:
Wire hook-ups for the -132
PRIMARY:
WHITE= plates (pin#3 for V6 and V7)
RED= plates (pin#3 for V4 and V5)
BROWN= Center-Tap (goes to the B+)

SECONDARY:
ORANGE= GROUND
YELLOW= 4 Ohms
GREEN= 8 Ohms
GREY= 16 Ohms

[vanhalen5150]

I think I'll stick to the new grid stoppers actually, but change the positioning a bit. I have the same 2" OT as well. I've kept my other 12000 stock from Georges kit, I'm interested in seeing the tone difference with these other parts. Larry Grounding as well. May add Fx loop.

[Strat78]

Replaced the 32 PI with a 100uf and did a clip. I thought it was a bit loggy sounding but after listening to VHI again, it might not be too far off. Perhaps nudging he mic just a little bit more to the center of the cone might eliminate that slighty farty low E. Still, I think I'll put in a 64uf PI cap just to hear the difference. Also, I tried the mxr 6-band with this as well, but it seemed to ruin the VHI vibe that the amp has naturally. Lots of progress with this build, finally.
Here is the clip with the guitar,phase 90, echoplex into the amp:
http://soundclick.com/share.cfm?id=10458143" onclick="window.open(this.href);return false;

[vanhalen5150]

Sounds pretty good to me. Attenuated? What screens/mains do you have?

[Strat78]

32 and 100''s and 32 pre's. Pretty much along the lines of George's kit but with an external variac bringing it down to 380v with a bias around 46 on the EH 6ca7's.

[vanhalen5150]

Ok. I have a set of those EH's as well and a set of Mesa's EL34's. I was reading some old internet stuff on the EH's from about 2003 or so and everyone said they were bad. Blowing OT trannies and all kinds of crazy shit. Are these a newer version of those, and/or I wonder what some of these guys were trying to do? I have a feeling they just didnt understand much of the re biasing stuff.

After running your setup the way it is for a while, do the trannies get hot?

How do we fiqure out the sag of these PT's ?

[Strat78]

I remember that about the EH's too but somewhere in the murky shallows of my mind I remember reading that the new ones have eliminated the problem. Still, I'll give the tranny's a good feel the next time I give the amp a run around the block. Yeah, how do you measure sag?

[vanhalen5150]

From what Dave F said, something like 70+ volts from wall voltage and then 50+ volts with the variac. Does he mean the amp sags when played or because it's dim'd causing the sag. I think he means while being played. So...is the sag measured in AC on the PT secondary or in DC after the rectifier diodes? How are they measuring that? Just a meter in series set to AC or DC accordingly?

[Strat78]

Good question. So, referencing VH1 type sag: the C and D chords in the chorus of I'm The One, and the the D and E chords in RWTD before the second solo: You want that ability to strain (mush out) the PT with how hard you hit the strings. When I had the straight 32uf PI cap in the 12 series it was too mushy (with Dave F specs and setup minus the 100uf PI) even without aggressive picking. With the 50/50 PI cap it is just about right, yet the low end flubbs out when you hit the strings too hard (bass setting at about 3). I should have tried a clip with the bass on zero, but I went ahead and put in a 32/32 PI cap to see where that takes the low E string. Just need a window to make another clip with the amp dimed. The rabbit hole is deep.

[vanhalen5150]

Nice bomb!

Did they film SawIII at this location? Whats that thing by the red table? Looks like a water cooler. Dont have an amp cradle built? $20 worth of material from Drone Depot made mine.

The sag thing eludes me. Dave and Plexified keep chewing about it, but nobody gets it perhaps. I think its over my head for now. I have a few really good books, but they dont touch on it.

[vanhalen5150]

I want a bomb now too. I wonder if VHjunkie has parts for those?

[vh junkie]

I can't measure sag with my meters... but I can see it on the oscilloscope... the right way to do it is to inject 1-2khz tone into the amp input... as you crank it you will see the sag get greater and greater. I can see it just fine banging on the chords though.