Choke question - 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 1st December 2008, 03:13 AM   #1
JoshK is offline JoshK  Canada
diyAudio Member
 
Join Date: May 2004
Location: Toronto, ON
Default Choke question

I was playing around with PSUDII, trying to simulate a PSU for my 813 SET idea. The raw B+ I am getting is around 950-1000V depending on the amount of current I pull. Trouble is a lot of chokes don't have that for insulation ratings.

Can one just put the choke on the ground side and have it function the same without insulation problems? I've seen it done before, but I wanted to double check with the experts.
  Reply With Quote
Old 1st December 2008, 03:35 AM   #2
diyAudio Member
 
zoranaudio's Avatar
 
Join Date: Jun 2008
You can use some isolation material like vitroplast (PCB), plastic or....
teflon if you like.
1000 volts is not so high voltage to be
We Hams also using high voltage in my case 2.5 KV on the anode of GU50.
1cm free space from the chassis is more than enough for 1000v.
__________________
zaudio
  Reply With Quote
Old 1st December 2008, 11:26 AM   #3
diyAudio Member
 
zigzagflux's Avatar
 
Join Date: Oct 2006
Location: Charlotte, NC
If the choke is accessible from the outside, and people will potentially contact it, then I would place it in the negative path. No problem at all doing this, as long as you realize "circuit common" has now moved to the downstream end of the choke.

i.e. if you have a CLC filter, circuit common will be at the grounded end of the second C.
  Reply With Quote
Old 1st December 2008, 12:49 PM   #4
JoshK is offline JoshK  Canada
diyAudio Member
 
Join Date: May 2004
Location: Toronto, ON
Thanks guys. I am using a choke input supply. My first choke is a monster, completely sealed, 6h/35ohm. It can take the voltage. However, it wasn't enough to get the ripple low enough with just an LC, so I was considering at least another section.

These are monoblocks, so whatever I do, will be done twice. Hammond has some useable chokes but the 1000V rated chokes are nearly twice the 600VDC rated ones. So I was thinking of putting the second choke on the ground side instead. It might go under the hood, or it may not. I haven't thought that far down the line.

P.S. Does anyone know how to make their own hybrid bridge in PSUDII? I was looking to make a 6CJ3/SS hybrid bridge. All that is already available is all 6CJ3 or 5AU4 Graetz bridge.
  Reply With Quote
Old 1st December 2008, 02:46 PM   #5
diyAudio Member
 
zigzagflux's Avatar
 
Join Date: Oct 2006
Location: Charlotte, NC
http://www.lundahl.se/hybrid_pow.html
  Reply With Quote
Old 1st December 2008, 03:31 PM   #6
diyAudio Member
 
Tom Bavis's Avatar
 
Join Date: Jun 2002
Location: Macedon NY
Quote:
Originally posted by JoshK


P.S. Does anyone know how to make their own hybrid bridge in PSUDII? I was looking to make a 6CJ3/SS hybrid bridge. All that is already available is all 6CJ3 or 5AU4 Graetz bridge.
Run the sim twice - with SS and vacuum rectifiers. Then take the average of the two.

As for the choke, I see no problem with putting one in the minus lead... might even give a little more common mode noise suppression.
  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
Question on choke BHD Tubes / Valves 2 11th June 2009 03:45 PM
Choke question nkg Tubes / Valves 26 22nd November 2006 08:39 PM
20W PP Choke PSU Question sorenj07 Tubes / Valves 0 29th July 2006 05:57 PM
Toroid choke question okkyn Tubes / Valves 3 24th December 2005 05:26 AM
choke and cap question Raj1 Tubes / Valves 2 2nd November 2003 02:30 PM


New To Site? Need Help?

All times are GMT. The time now is 02:17 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