CCDA SE output stage? - 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 18th July 2012, 06:02 PM   #1
diyAudio Member
 
Join Date: Mar 2012
Default CCDA SE output stage?

Say I have a typical SE output stage, with an OPT loaded on the anode of a triode.

Would it make any sense, to have another identical triode to do nothing apart from to draw current in opposite phase from the triode driving the OPT? Which would make the current draw appear constant to the PSU? If it would work at all, is it actually beneficial in practice?

Thanks.
  Reply With Quote
Old 18th July 2012, 06:09 PM   #2
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
I'm sure this question, or a similar one, came up a few months ago. Yes it would work, after a fashion. To do it properly you would need an identical loudspeaker in an identical room fed by the same length of identical cable, but acoustically isolated from the room you are in. No it would not make any sense, even less sense than the normal CCDA.
  Reply With Quote
Old 19th July 2012, 01:38 AM   #3
diyAudio Member
 
Join Date: Mar 2012
So I guess, you are not a fan of normal CCDA?

Say it is to be used with unregulated power supply, where a current draw would correspond to a voltage drop. While it is not possible to have 2 identical triodes driving 2 identical loads, wouldn't it help minimizing current draw fluctuation? But of course if it is in fact an audible improvement is another matter.
  Reply With Quote
Old 19th July 2012, 12:03 PM   #4
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
I can't see the point of normal CCDA, especially the constant current aspect of it. I can see some merit in cancelling supply noise (the other feature of CCDA) but cancellation is always a risky thing to do as it relies on a balance between two nasty things remaining balanced. Power supplies can cope with current variation, so why double the number of valves just to minimise something which doesn't matter? When you load the CCDA the current balance disappears anyway!
  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
SE Mosfet line stage with transformer output andyjevans Solid State 2 26th November 2011 09:30 PM
Using a CCS on SE Output Stage eeyore Tubes / Valves 8 24th May 2010 10:04 AM
3C24 in a SE output stage - output transformer impedance recommendation !!! aldovan Tubes / Valves 15 6th September 2008 11:18 AM
SE EL84 output stage? Lingwendil Tubes / Valves 2 29th June 2008 06:55 PM
New Hybrid Output Stage and booster for SE Amp smoking-amp Tubes / Valves 3 20th March 2006 03:24 AM


New To Site? Need Help?

All times are GMT. The time now is 02:05 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