use 120V x 2 for Aikido octal transformer? - 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 30th January 2010, 06:19 PM   #1
diyAudio Member
 
Join Date: Jan 2002
Location: Puget Sound
Default use 120V x 2 for Aikido octal transformer?

Just received my Aikido all-in-one octal kit and am getting ready to assemble.

I bought the kit with no idea about what transformer I'd need but it looks like my existing 120V x 2 toroid I have powering my grounded grid would work with the secondaries in series.

I have a hazy recollection of reading somewhere on diyaudio that the secondaries had to be connected in a certain way otherwise the transformer would heat up or something bad would happen.

I did not mark the secondaries so that I know which end of the wire is the first winding layer and which is the last and it's all wrapped up in mylar tape.

Is this important to know? Is there a way to determine this without unwrapping the outer insulation?
  Reply With Quote
Old 30th January 2010, 06:35 PM   #2
diyAudio Member
 
Join Date: Apr 2004
Location: Monroe Township, NJ
Quote:
Originally Posted by ultrachrome View Post
Just received my Aikido all-in-one octal kit and am getting ready to assemble.

I bought the kit with no idea about what transformer I'd need but it looks like my existing 120V x 2 toroid I have powering my grounded grid would work with the secondaries in series.

I have a hazy recollection of reading somewhere on diyaudio that the secondaries had to be connected in a certain way otherwise the transformer would heat up or something bad would happen.

I did not mark the secondaries so that I know which end of the wire is the first winding layer and which is the last and it's all wrapped up in mylar tape.

Is this important to know? Is there a way to determine this without unwrapping the outer insulation?

Energize the primary with low voltage AC. Phase the secondary windings up using a multimeter. The correct series arrangement of the secondaries will yield "2X" the excitation voltage. The incorrect arrangement will yield "zero" Volts.
__________________
Eli D.
  Reply With Quote
Old 30th January 2010, 07:13 PM   #3
diyAudio Member
 
Join Date: Jan 2002
Location: Puget Sound
I get no voltage if I have it wrong? Thanks, that's simple.

Perhaps the comment I saw was in regards to using the secondaries in parallel?
  Reply With Quote
Old 31st January 2010, 07:05 PM   #4
diyAudio Member
 
Join Date: Dec 2003
Location: Midwest
Yea, if the secondaries are in parallel wrongly, it'll be a short-circuit.
  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
Using 230v Transformer with 120v Mains Phostenix Power Supplies 3 24th September 2009 08:46 PM
FS Aikido Octal linestage $75 nvrgdenuf Swap Meet 2 29th December 2008 08:35 PM
Calculating PS current for octal Aikido jrebman Tubes / Valves 4 25th March 2008 08:47 PM
I need a 120v ct transformer... Where to look? ThSpeakerDude88 Tubes / Valves 15 24th March 2007 02:19 AM
Octal Aikido? What tubes? jayme Tubes / Valves 8 31st December 2006 03:03 AM


New To Site? Need Help?

All times are GMT. The time now is 05:35 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