SRPP (something like in the world of vacuum tubes) in solid state audio aplications - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 3rd June 2004, 11:22 AM   #11
Bricolo is offline Bricolo  France
diyAudio Member
 
Bricolo's Avatar
 
Join Date: Nov 2002
Location: Grenoble, FR
Can someone explain me briefly what SRPP is?
  Reply With Quote
Old 3rd June 2004, 11:36 AM   #12
diyAudio Member
 
Andypairo's Avatar
 
Join Date: Sep 2002
Location: near Milano , Italy
Default Re: SRPP

Quote:
Originally posted by Bojan Hajdinjak
I'll send you by the mail ( its from the internet....)

May I ask a copy of it?

my email is pirobrothers(at) tin.it

Cheers

Andrea
  Reply With Quote
Old 3rd June 2004, 11:40 AM   #13
diyAudio Member
 
Join Date: Jun 2004
Location: Ljubljana - M. Sobota, Slovenia
Default SRPP is...

Shunted Regulated Push Pull or Series Regulated Push Pull.
It's not Push Pull like we know this. In the case, it's A class design with one FET (or triode valve) in class A amplification stage and with another FET (or valve) in the function of adjustable anode (drain) resistor. It's one of electronic designs (circuits), something like by motor cars with Diesel Ottos or Wankl motors,....

This design is a par of the best triode constructions in High End audio an now (www.hiendfi.com) we can find something of this also in solid state world...

You have plenty of this on the internet (but only regards valves, trides,...)

On this page http://www.hiendfi.com/modules.php?n...rticle&sid=102 you can see something of this, no one newer published nowhere...., something unique..
__________________
www.hiendfi.com
www.hajdinjaklabs.com
  Reply With Quote
Old 3rd June 2004, 11:44 AM   #14
diyAudio Member
 
Join Date: Jun 2004
Location: Ljubljana - M. Sobota, Slovenia
Default Re: Re: SRPP

Quote:
Originally posted by Andypairo



May I ask a copy of it?

my email is pirobrothers(at) tin.it

Cheers

Andrea

Ok. I hope to understand your mail adress.
Anyone who want this, please send me mail on the info on www.hiendfi.com
__________________
www.hiendfi.com
www.hajdinjaklabs.com
  Reply With Quote
Old 3rd June 2004, 11:47 AM   #15
diyAudio Member
 
Ouroboros's Avatar
 
Join Date: Dec 2003
Location: Nottingham UK
SRPP effectively combines a high-impedance load for the first stage, together with a low-impedance drive (like a CF) to the next stage. It's one of those design techiques from decades ago that was suddenly 're-discovered' in the 1980s.

Not really applicable to solid state as it's better to use a current-source load followed by an emitter follower. (IMO of course!)


Now the White follower is something that works superbly with SS. It is especially good as the output driving stage on a pre-amp.
  Reply With Quote
Old 3rd June 2004, 11:49 AM   #16
diyAudio Member
 
Join Date: Jun 2004
Location: Ljubljana - M. Sobota, Slovenia
Default SRPP with JFETs and with Valves

For the compare..

Here you have picture of typical SRPP with FETs

Click the image to open in full size.

and with valves (look on the inpust stage)

Click the image to open in full size.
__________________
www.hiendfi.com
www.hajdinjaklabs.com
  Reply With Quote
Old 3rd June 2004, 12:15 PM   #17
Bricolo is offline Bricolo  France
diyAudio Member
 
Bricolo's Avatar
 
Join Date: Nov 2002
Location: Grenoble, FR
I think this has been asked before, but isn't an Aleph some kind of SRPP?
  Reply With Quote
Old 3rd June 2004, 12:36 PM   #18
diyAudio Member
 
Join Date: Jun 2004
Location: Ljubljana - M. Sobota, Slovenia
Default SRPP

No, it's not
__________________
www.hiendfi.com
www.hajdinjaklabs.com
  Reply With Quote
Old 3rd June 2004, 01:51 PM   #19
Bricolo is offline Bricolo  France
diyAudio Member
 
Bricolo's Avatar
 
Join Date: Nov 2002
Location: Grenoble, FR
I only had a brief look on the schematic you posted here as a picture, and from what I saw, SRPP is an active device biased by a current source. The "special thing" is that the current source is setting the current according to the output voltage.

am I wrong?

This isn't so far away from Alephs or JLH
  Reply With Quote
Old 3rd June 2004, 03:21 PM   #20
diyAudio Member
 
Join Date: Jun 2004
Location: Ljubljana - M. Sobota, Slovenia
Default SRPP

It's not so simple.
One is technical and another is sonical vuew on amplifier design

There are plenty of different SRPPs...
__________________
www.hiendfi.com
www.hajdinjaklabs.com
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Germanium in the World of solid state (preamps) Bojan Hajdinjak Solid State 111 19th April 2009 04:02 AM
World Solid-state Diy Build-off! vdi_nenna Everything Else 2 27th December 2004 08:09 PM
ESL amp: tubes vs solid state: where is the winner? Milo Tubes / Valves 43 28th April 2003 09:51 AM
Solid state guy found some tubes... OliverD Tubes / Valves 9 31st December 2002 03:03 PM
Discussion of Solid State vs. Tubes EternaLightWith Solid State 34 30th August 2002 05:33 PM


New To Site? Need Help?

All times are GMT. The time now is 08:57 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2