Transformer with dual high voltage windings - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Tubelab

Tubelab Discussion and support of Tubelab products, prototypes and experiments

Reply
 
Thread Tools Search this Thread
Old 2nd October 2013, 04:59 PM   #1
diyAudio Member
 
Join Date: Oct 2010
Location: Toronto, Ontario
Default Transformer with dual high voltage windings

I'd like to try 6V6 tubes in my SSE but the B+ from my Edcor XPWR035 is
too high for these.
Is this Edcor dual high voltage power transformer suitable for switching
between 6V6 and KT88 and other tubes ?
EDCOR - XPWR144-120/240

The dual voltages are 760V and 640V (380-320-0-320-380) at 200mA
which are a little bit above what Tubelab recommends.
The 6.3v main filament winding is rated for 3.5a, below what Tubelab
recommends so any problem here ?

This one is also much lighter than the XPWR035, 6.33lbs vs 9.75lbs

Opinions anyone ?

Last edited by spendorite; 2nd October 2013 at 07:09 PM.
  Reply With Quote
Old 3rd October 2013, 03:55 PM   #2
diyAudio Member
 
Sodacose's Avatar
 
Join Date: Feb 2006
Location: mke, wi
What type of rectification are you using? Choosing the right voltage drop will probably allow you to use that HV without problems.

Not sure about the heater draw, though.
  Reply With Quote
Old 3rd October 2013, 07:49 PM   #3
diyAudio Member
 
Join Date: Oct 2010
Location: Toronto, Ontario
Quote:
Originally Posted by Sodacose View Post
What type of rectification are you using? Choosing the right voltage drop will probably allow you to use that HV without problems.

Not sure about the heater draw, though.

Yes it is the low 3.5a on the 6.3v heater supply that is putting me off.
It is fine for the 5v rectifier supply.

Anybody else have any comments on this ?
  Reply With Quote
Old 3rd October 2013, 08:47 PM   #4
diyAudio Member
 
Sodacose's Avatar
 
Join Date: Feb 2006
Location: mke, wi
6v6 data sheet says about .5A heater draw. 12AT7 is less than half an amp. You'd be covered with 3.5A.

EL34's or KT88's, on the other hand, are 1.5A+ so you would be really pushing it.

If you're willing to wait on an Edcor, have you considered having something custom built (as in not choosing a pre-configured transformer)?
  Reply With Quote
Old 3rd October 2013, 11:33 PM   #5
diyAudio Member
 
Join Date: Oct 2010
Location: Toronto, Ontario
Quote:
Originally Posted by Sodacose View Post
6v6 data sheet says about .5A heater draw. 12AT7 is less than half an amp. You'd be covered with 3.5A.

EL34's or KT88's, on the other hand, are 1.5A+ so you would be really pushing it.

If you're willing to wait on an Edcor, have you considered having something custom built (as in not choosing a pre-configured transformer)?

I don't know, maybe later on I'll just build a smaller SSE for 6V6 tubes,
problem is I have too much equipment and no more space which is why
I was thinking of a combo amp using a dual high voltage xfrmr.
  Reply With Quote
Old 4th October 2013, 01:54 AM   #6
diyAudio Member
 
Sodacose's Avatar
 
Join Date: Feb 2006
Location: mke, wi
What about a small transformer dedicated to the heaters?
  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
Wanted - High Power, High Voltage, Audio Frequency Transformer Manual. kimbal Tubes / Valves 4 11th May 2009 08:05 PM
isolation transformer - high voltage. atmars Tubes / Valves 7 16th July 2008 04:34 AM
high quality 10A dual voltage regulator sunrise Solid State 32 1st December 2006 11:57 AM
Transformer voltage too high for 300B amp Jaap Tubes / Valves 4 13th January 2005 12:09 PM
high-voltage regulated dual power supply zzz Solid State 1 17th September 2002 01:15 AM


New To Site? Need Help?

All times are GMT. The time now is 01:53 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