power transformer recommendation - Page 4 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs 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

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 12th December 2008, 10:46 AM   #31
diyAudio Member
Rob11966's Avatar
Join Date: Jun 2007
Location: Australia
I will put in a plug for the people at Edcor,

By coincidence, a couple of power transformers arrived from Edcor today. They were a custom design for my (slow to build) 845.

Edcor were helpful, fast and the transformers are nicely made and testing to specifications. Good price too.

Thought they deserved a good word.


  Reply With Quote
Old 13th December 2008, 03:34 AM   #32
diyAudio Member
Tubelab_com's Avatar
Join Date: Jul 2005
Location: West Virginia panhandle
I missed this thread because it started during the week that I was out of town. A Simple SE with EL34's, KT88's, or good quality 6L6GC's works best with a B+ in the 420 to 475 volt range. This requires a power transformer with a 700 to 750 volt range. These are usually specified as 700 VCT to 750 VCT or 350-0-350 volts to 375-0-375 volts. A transformer with a slightly lower voltage can be used with lower output power. Do not go over 750 VCT as this will allow the B+ voltage to go too high. A 6.3 volt winding is needed to power the amplifier tube filaments. A 5 volt winding is needed to power the rectifier tube.

I usually tell people to use the Allied 6K7VG especially if cost is an issue. The Hammond 274BX is essentially the same transformer, but cost more. The Hammond 374BX is a larger and better built transformer, with an even higher price.

There's a guy in N. Arlington, NJ who makes, and markets toroids for the masses.
I have bought a few Antek transformers for other projects. You can use a AN-4T360 (720 VCT) to power a Simple SE. It does not have a 5 volt winding, so you must use the Solid State diodes, and no rectifier tube. The AN-4T400 puts out too much voltage with the solid state rectifier.

i found a supplier who can get me hammond's in a week. my outputs are now hammonds, power still unknown.
274BX, or 374BX.
Tubelab, it's 5 year mission. To explore strange new tubes, to seek out new circuits and topologies, to boldly go where no tube has gone before......
  Reply With Quote


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
transformer selection recommendation for aleph 30 hc167 Pass Labs 12 27th March 2007 04:33 AM
Aikido Transformer recommendation Burnedfingers Tubes / Valves 0 14th March 2007 10:51 AM
Aleph 30 transformer recommendation SteveA Pass Labs 23 26th April 2006 03:25 PM
power supply recommendation for EL84 amp chevelle Tubes / Valves 5 16th January 2006 12:41 AM
power transistor recommendation metebalci Solid State 0 12th May 2004 03:08 PM

New To Site? Need Help?

All times are GMT. The time now is 07:29 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2