Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

Balanced 24V Aikido question
Balanced 24V Aikido question
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
Thread Tools Search this Thread
Old 27th November 2008, 02:18 AM   #1
khundude is offline khundude  Canada
diyAudio Member
Join Date: Sep 2006
Default Balanced 24V Aikido question

I have bought a couple of 24V Aikido boards to do a balanced preamp/canamp. I want to know if there is a way to remove the DC coupling caps. I thought that if a +/-12V ps was used there would be no need for coupling caps. If that is the case, could I not wire one board +24 with the L/R+ signals and the other with -24 for the L/R- signals and tied with a resistor for each channel? I could be way off base but I thought this might achieve a balanced circuit without really altering the circuit in any way?
  Reply With Quote
Old 27th November 2008, 03:53 PM   #2
Francois G is offline Francois G  United States
diyAudio Member
Join Date: Jun 2004
Location: Champaign, Illinois
The schematic for the 24v board is not available on his website so it is diificult to give difinitive answers about the balance version. But I assume you got the construction manual if you bought the boards from John Broskie -- you should follow the construction manual, or contact John if you are not very experienced in tubes.

In general tube circuits always need a capacitor because the output is a positive voltage with respect to ground. I quess that you will need the coupling cap in the balance version for safety reasons, or else the balance output could be many volts above ground. Aditionally it would be difficult to ensure that the both outputs of a balance pair would be at the same potential, i.e. in DC balance.

Use the caps - good caps are fine!

Hope this helped.
  Reply With Quote
Old 27th November 2008, 03:59 PM   #3
Francois G is offline Francois G  United States
diyAudio Member
Join Date: Jun 2004
Location: Champaign, Illinois
Forgot to mention that additionally the proposed scheme, if I understand correctly, probably can't work because unlike PNP transistors tube can only ,conduct + to -.
  Reply With Quote


Balanced 24V Aikido questionHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Aikido question kacernator Tubes / Valves 6 22nd April 2008 11:40 AM
Aikido circuit question jayme Tubes / Valves 3 14th September 2007 09:31 PM
Aikido Attenuator kit question talaerts Tubes / Valves 2 9th January 2007 10:12 PM
Aikido question SteveA Tubes / Valves 10 20th November 2006 08:30 PM
Quick Aikido question Craig405 Tubes / Valves 2 8th September 2005 06:49 PM

New To Site? Need Help?

All times are GMT. The time now is 03:23 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio