Looking for a PCB / kit for a bipolar tube rectified PSU - 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 9th August 2007, 01:43 PM   #1
diyAudio Member
 
luvdunhill's Avatar
 
Join Date: Jul 2006
Default Looking for a PCB / kit for a bipolar tube rectified PSU

Hi everyone! I originally posted here

http://www.diyaudio.com/forums/showt...16#post1274416

looking for some power supply recommendations. Since, I've decided that I would like to try a tube rectified PSU. Please see the above link and the links contained within for details on the project. I would really like to use a PCB for the project if at all possible. Any recommendations? I'm looking for something rather simple that would output +- 400 VDC.
  Reply With Quote
Old 9th August 2007, 02:10 PM   #2
Tweeker is offline Tweeker  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Cincinnati, Ohio
Getting the +/- 400V with tube rectification is going to involve multiple isolated filament windings. It wont be rather simple. Theres a reason you dont see many tube rectified amps with bipolar supplies.
__________________
Be sure your foil hat has a good low impedance ground.
  Reply With Quote
Old 9th August 2007, 02:51 PM   #3
diyAudio Member
 
luvdunhill's Avatar
 
Join Date: Jul 2006
... hm, what about two 400 V DC supplies hooked together? I've seen a few "kits" on Ebay that claim they can put out 400 V DC ... I've done this before in the solid state PSU world, but I have no idea how stupid this might be in the tube world
  Reply With Quote
Old 9th August 2007, 03:37 PM   #4
Tweeker is offline Tweeker  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Cincinnati, Ohio
+400 and +800 could be done more readily, though is much more dangerous than +/- 400.

I dont have any negative versions handy, but heres an illustration of a bridge rectifier done in tubes to show why Im a bit dubious of any simple project. 2 of the diodes cannot be a duodiode.

Click the image to open in full size.
__________________
Be sure your foil hat has a good low impedance ground.
  Reply With Quote
Old 10th August 2007, 04:30 PM   #5
diyAudio Member
 
luvdunhill's Avatar
 
Join Date: Jul 2006
tweeker, I guess I just don't see why it should be so hard. ;( I'm a bit slow though. I thought that differential amps used dual supplys?

hm... any other ideas out there?
  Reply With Quote
Old 10th August 2007, 05:21 PM   #6
Tweeker is offline Tweeker  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Cincinnati, Ohio
Er, what exactly are your psu requirements?

A differential amp does not require a negative rail, though it may be helpful. It normally does not require bipolar. No need for more than ~200 volts across the tail, and thats in the worst case of a pentode CCS.
__________________
Be sure your foil hat has a good low impedance ground.
  Reply With Quote
Old 10th August 2007, 06:21 PM   #7
diyAudio Member
 
luvdunhill's Avatar
 
Join Date: Jul 2006
here's a link:

http://headwize.com/projects/showfil...lmore4_prj.htm

basically, +- 400 VDC, < 150 mA

Thanks again for the help!
  Reply With Quote
Old 15th August 2007, 03:39 AM   #8
diyAudio Member
 
luvdunhill's Avatar
 
Join Date: Jul 2006
I think I may understand the confusion now Tweeker... Assume that you have two 350 VAC inputs, from a 350-0-350 transformer.
  Reply With Quote
Old 15th August 2007, 06:49 AM   #9
diyAudio Member
 
Geek's Avatar
 
Join Date: Sep 2004
Default Re: Looking for a PCB / kit for a bipolar tube rectified PSU

Hi,

Quote:
Originally posted by luvdunhill
I would really like to use a PCB for the project if at all possible. Any recommendations?
I have a PCB that can do hybrid or SS of what you need (though not bipolar all-tube).

Would it help?

Cheers!
  Reply With Quote
Old 15th August 2007, 01:19 PM   #10
diyAudio Member
 
luvdunhill's Avatar
 
Join Date: Jul 2006
Default Re: Re: Looking for a PCB / kit for a bipolar tube rectified PSU

Quote:
Originally posted by Geek
Hi,



I have a PCB that can do hybrid or SS of what you need (though not bipolar all-tube).

Would it help?

Cheers!

maybe this would work, although again I'm not sure. You allow for using a full wave rectification. In my case, would using two diode tubes allow for more current that paralleling the 2 sections of a full-wave rectifier as a diode? I guess this is part of my confusion. If the full wave rectification would work, then yes two of your boards would work quite nicely!
  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
learning tube rectified psu milen007 Tubes / Valves 26 21st September 2008 12:28 PM
PSU question? Going tube rectified sbelyo Tubes / Valves 47 2nd June 2006 09:27 PM
tube rectified preamp schematic sv62 Tubes / Valves 14 30th June 2004 10:16 AM
How much capacitance for tube rectified PSUs? JoeBob Tubes / Valves 3 26th May 2003 01:13 AM


New To Site? Need Help?

All times are GMT. The time now is 03:48 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