Paralle Push Pull Simulclass - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 13th September 2005, 03:42 AM   #1
diyAudio Member
 
Join Date: Oct 2004
Location: Adelaide South Oz
Default Paralle Push Pull Simulclass

Has anyone tried a a Parallel Push Pull Output with one pair of tubes running Triode Mode Class A to handle low level detail with the second pair running Triode or Ultalinear Class AB1 for additional grunt on demand.

I'm thinking of giving this a go using a current source in the Class A section Cathodes.
Are there any "traps for young players" that you would anticipate.

Trannies I have on hand to give it a go:
Hammond 1650T (Raa = 2000, 40% UL Taps, 120W)
VDV 2100 (Raa = 2000, 40% UL Taps, 100W)
VDV 2100 CFB/H (Raa = 2000, 30% UL Taps, 10% Cathode Feedback Taps, 100W)

Have matched quads of EL34, 6550 and KT88 Tubes on hand

Any thoughts/experience/advice greatfully received.

Cheers,
Ian
  Reply With Quote
Old 13th September 2005, 05:42 AM   #2
diyAudio Moderator Emeritus
 
ray_moth's Avatar
 
Join Date: Jan 2004
Location: Jakarta
The idea is not new and has been given several names over the past few decades. Have you seen John Broskie's article about this in TubeCad? It's such an obvious thing to do that it's surprising there hasn't been more expolitation of it but I have read, somewhere, that linearity can be a problem. Some commercial outfit claims to have cured the problem but I don't know if they've been successful in selling it. (Sorry to be so vague but I can't remember where I saw this stuff, except that it was definitely on the 'net somewhere.)
  Reply With Quote
Old 13th September 2005, 06:10 AM   #3
diyAudio Member
 
Tubes4e4's Avatar
 
Join Date: Jul 2005
Location: Leverkusen
Quote:
The idea is not new and has been given several names over the past few decades.
IIRC it is mentioned in RDH4, too.

Tom
__________________
If in doubt, just measure.
  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
An all DHT push pull amp. Eusebius Tubes / Valves 3 28th October 2006 12:37 PM
modify parallel push-pull EL84 to single push-pull chungtat Tubes / Valves 12 3rd November 2005 11:25 PM
Is the Zen really a push-pull? Kashmire Pass Labs 3 17th August 2004 09:07 PM
push pull 845 audioman Tubes / Valves 5 30th August 2003 05:53 PM
Double push-pull versus single push-pull jraraujo Tubes / Valves 19 19th October 2002 12:23 AM


New To Site? Need Help?

All times are GMT. The time now is 01:51 AM.


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