The Amp Garage

Plates ARE 680k, cathode 68k - when I saw it,
I don't believe my eyes, but multimeter
says it's true. Grid has no reference to ground,
but it works...
Not so classic rendering of DC-coupled LTP
Any clues?

Edit: Schematic with voltages added

Schematic in atachement. Definitely NOT 5E3. Amp got 16W on 8R dummy load when tone set to 5 and volume set to 2 (yes, two). I mean sine wave not clipped. All coupling caps 1000V MKP SCR, all resistors looks like Vishay metal. Unusual phase inverter - I don't know how it works, there is open circuit...

Not 5E3, not split load PI. Visual appearance of this amp is a bit confusing - we all judge a book by its cover :D Me too - my surprise after opening the chassis continues until now. But split load PI is nothing unusual for me, I've been building amplifiers for years. Tomorrow I try to post schemati...

Hello, My friends amp, bought at French pawnshop. Looks like custom order. Specs: Combo 1x12 in tweed, 2 x ECC83/12AX7 (first preamp like fender tweed and second very unusual phase inverter), 2 x 6V6 cathode biased, each on his own cathode resistor and capacitor Rectifier GZ34/5AR4 Transformers by H...

The Pig is NOT Major.
http://forum.metropoulos.net/viewtopic. ... 7&start=60

Datasheet says 250V for classA, 300V AB.

Hot amp! I like it!
I try to do 2-channel amp after you.
Elements in red circle will be matched to personal preferences.

Yes, higher cathode resistor get out some "shattered glass" from tone.
Sound will be warmer and rounder - simply try it.
I edit my previous post:
EDITED: 180R - 220R cathode resistor PER PAIR

No more class A EL84 with B+ voltages over 280-300V.
AC30, TW, all DR Z, Matchless, BadCat amps all are class AB amps with silly overbiased EL84.
"Class A" marketing hype on these tube eaters

With your voltages try 180R - 220R cathode resistor. You can it biased at about 85% at idle. EDITED: 180R - 220R cathode resistor PER PAIR.
And you will like what you hear

xtian wrote:Thx, Vince. In that case, I have been successfully abusing my Russian tubes for the past couple of years with no issues.

You're lucky man! When I try do it in Bassman 100 - two of 6P3S go to
the south in seconds

I ordered a dozen Russian 6P3S (6L6GC) (6Π3C) from an eBay guy in Ukraine. ... 6P3S (without -E) aren't 6L6GC! They like voltages under 400VDC and are mechanically delicate. Don't use them in high voltage amps. http://img-fotki.yandex.ru/get/4706/5482694.9/0_5de30_daa02b84_XL.jpg 6P3S has 20,5...

Vince wrote:Stolen from lespaulforum.

I have two more, not displaying on this forum

Stolen from lespaulforum.

rooster wrote:Yes, update me. It is interesting to see the use of a mic/line matching transformer in an amp

It's used as inductor in series with cathode bypass cap. HAD did something like this in his Manzamp.