George saw Ed's amp? Spill some beans Mr. Velvet!

[somethin'else]

Think I'll get a tattoo of the specs! You guys are truly Golden. Many Thanks for your talents!

(party foul, Velva)

[Velva]

It is a sticky topic and my curiosity got the best of me. Question rescinded. Thanks for the info. Very interesting stufff...

[SteadyEddie]

Am I missing something? I thought the amp was rebuilt from the bare chassis by Van Wheelden or something.

[RACKSYSTEMS]

I normally would like the 47k feedback off the speaker jack to but you need all the specs to sound right with with the 100k. Variac bias 6ca7's etc.

[stratonenator]

I have found that DF's specs work with the whole equation, the real Sylvania 6ca7's love that 100k 4ohm tap.

[demonufo]

Any word on what TUBES are currently in the amp?

This might have a big bearing on the fact he says it doesn't sound like it used to...

And then there's the question of does he still have those old 20W Celestions, and the condition that they might be in...

[Ruben]

These specs George ???

Split cathode V1a 250uF/820,V1b .68/820
All coupling caps are 0.022uF,Bright channel coupling cap is 0.0022uF

470k mixer resistors
500pf [red out of 69 amp] mixer bypass cap
Bypass cap on V2a is .68uF and a 220uf to 470uf
33k/560pF lemco tone stack combo
100k NFB resistor at 4 ohm tap
220k bias splitter resistors
0.1 uF cap on presence control
.022uf output couplers

filtering is
2] 100uf's f&t in series mains
2] 32uf's f&t in series screens
1]100uf lcr phase inverter
1] dual 33 x 33 f&t preamp

So, to be sure, THESE are the specs of Ed's Superlead?

[RACKSYSTEMS]

Yes with sylvania 6ca7 tubes and Chinese preamp tubes. Variac at 90 biased at 50 to 52ma.

[guitar007]

Did he share with you when and where he got the amp? I've heard differing stories. Also, was the mod in the rear of the amp there when he got it or did he have it done? Big thanks, Dave!

[efraser68]

Any word on what TUBES are currently in the amp?

This might have a big bearing on the fact he says it doesn't sound like it used to...

And then there's the question of does he still have those old 20W Celestions, and the condition that they might be in...

Right did Ed try it out through this cab?

http://www.youtube.com/watch?v=UkttTHiu4SA&t=8m39s" onclick="window.open(this.href);return false;

[Tazin]

My three questions on this topic are:

1. What's the low-down on the current Output transformer in the amp? (i.e. possible mfg, primary resistance, etc,.)

2. Can Dave or George offer any speculation as what they think the now plugged hole on the rear of the chassis; which used to have a possible potentiometer or switch installed; was used for?

3. Assuming the specs that Dave graciously revealed is the complete story, and he's not withholding any additional info; then why the absence of pictures of the amp? I mean why not even pictures of the top, front, or back of the chassis?

[demonufo]

3. Assuming the specs that Dave graciously revealed is the complete story, and he's not withholding any additional info; then why the absence of pictures of the amp? I mean why not even pictures of the top, front, or back of the chassis?

On a professional basis, I would say that might be 'pushing ones luck' a little if they were to do that. It's not really their place to go publishing photographs of someone else's equipment without their permission.

[Big Mike]

Awesome.

Thanks Dave and George.

My only question left, is it stock Marshall OT? Or is the VHT OT in it?

Stock would be a 1202-119 yes?\\

[VelvetGeorge]

Era correct Dagnall C1998. Out of a mint '68 Super Tremelo, is my understanding.

george

[Big Mike]

Thanks G!

Say hi to my buddy Bruce from Cliff when he comes bye the amp show.