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Bojan Hajdinjak 1st June 2004 06:03 PM

SRPP (something like in the world of vacuum tubes) in solid state audio aplications
Dear members of

Do you ever think about SRPP in solid state audio (preamp and driver) applications?

Something like on the link ?

SRPP is often part of some super triod amp. construction

But in solid state World? Have you any experience with? :confused:

destroyer X 1st June 2004 07:53 PM

I am reading and trying to understand first.
I will tell you some latter.

Thank you by the link.

Happy to see your country here.


destroyer X 1st June 2004 07:56 PM

I could not advance too much, because all the time
2 Attachment(s)
My eyes returned to this picture....My God!

Do you have this quality people in your country?

Very pretty.


Bojan Hajdinjak 1st June 2004 08:20 PM

It's a (very) small country (1,5 milion people). But we have some pretty girls :eek:

Bricolo 1st June 2004 09:26 PM

Welcome in the European Union :)

Bojan Hajdinjak 1st June 2004 09:42 PM

interesting people
Thank You very much :)

I'm glad to see so much interesting people here, on this site ;)

Dozuki 1st June 2004 11:24 PM

I have thought about mucking around with SRPP with solid state. I guess it's on my to do list. i also want to muck about with a white catholde follower in solid state as well. D. Self shows an example of this on his site, used for the outputstage of pre amps and the such. Figured it wouldn't take much to convert this to an output stage.

I've seen the Super triode connection, and i think there is a thread here about using it with solid state. I believe the inventor of it has the Evole Ampilifiers site (Japanese). Basicly the STC Amp uses the internal resistance of a valve for the feed back resistor.

There should be no reason why one couldn't use old Valve topologies with SS. Might work well, might be so, so. But, I think that there is a lot of potential in this as Valves are limited to N types so to speak and the designers came up with some very novel ways of dealing with issues because of this. Although I admit I'm no expert at any of this, just an adament hobbist.


Jonathan Bright 3rd June 2004 07:12 AM

In the last 3-4 months ELEKTOR have published a passive pre-amp built around two SRPP FET gain blocks(BF245/ etc.). It was a solid state version of a valve circuit they did in the mid 1980's. Looked good. No feedback. As you are in Europe you should be able to get a copy. I haven't got a scanner or I'd put more information up.

Bojan Hajdinjak 3rd June 2004 07:39 AM

SRPP from elector
Yes, it's true. Those (Electors) SRPPs isn't the same like HLs. I'll give you one copie into this site in the evening tonight. Yu'll see the full schematics.

Bojan Hajdinjak 3rd June 2004 10:43 AM

I'll send you by the mail ( its from the internet....)

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