TZ81 Transistor

[clintrubber]

[quote author="NewYorkDave"]Are you building a 1588B clone? That's an unusual choice.[/quote]
Just curious, you mean 'unusual' as in 'not happening often', or as in 'what a waiste of time' ?

 

[rafafredd]

And if you can build one just like the drawing, I'll buy you a beer 'cause it would be tricky to get all the DC operating points just right

Pultec MB1 allright.

 

[engelheimer]

On the classic, and elusive Altec ring of three circuit, Neve and others use it.
Built a tube version years ago...

 

[PRR]

> Built a tube version

Big Ampeg tube amps use hollowstate ring-o-3 for the fancy EQ stage. Some use a 12-pin triple triode.

 

[engelheimer]

Think it's in one of the SVT's, will czech it out and get back...

 

[engelheimer]

Think it's in one of the SVT's, will czech it out and get back...

All I can find is Jet's w/e'm, no ringo's...

 

[PRR]

For one: Ampeg VT-40, later versions. 6K11 stage, top middle.
http://el34world.com/charts/Schematics/files/ampeg/Ampeg%20VT-40%20(Rev.D)%20Schematic.pdf

 

[engelheimer]

Oh Yeah, that's the shared cathode follower ckt, C202 is the TIPB.

Was thinking more like this...

 

[E-money]

Wow, blast from the past thread that I started 10 years ago.

Never got around to modifying the 1588, had a family instead which is much more fulfilling.

Still use it from time to time, but it's been a while.

 

[engelheimer]

So your the originator of the schematic?

 

[E-money]

So your the originator of the schematic?

No.

I posted some photos of the insides of one of the preamp modules, but I don't think I have them anymore.