A less used approach - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 21st January 2003, 12:51 PM   #11
diyAudio Member
 
SuppersReady's Avatar
 
Join Date: Oct 2002
Location: UK
Default Suitable?

Following on from the original question of this thread, I have found a local (well, it's in the UK at least) source. http://www.audiocom-uk.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=A&Product_Code= AirCoreCU1.4

Would these be suitable for the PSU described earlier? The resistance seems higher than some of the American sourced chokes of similar guage. The transformer (one per channel) will be a 500VA device (ILP, I believe)

Cheers

Paul
  Reply With Quote
Old 21st January 2003, 09:05 PM   #12
diyAudio Member
 
SuppersReady's Avatar
 
Join Date: Oct 2002
Location: UK
Default Oops!

Or you could try this.

http://www.audiocom-uk.com/Merchant2...e=AirCoreCU1.4

Better luck this time

Paul
  Reply With Quote
Old 22nd January 2003, 07:27 AM   #13
uli is offline uli  Austria
diyAudio Member
 
Join Date: Dec 2002
Location: Vienna, Austria
Default Re: Oops!

Quote:
Originally posted by SuppersReady
Or you could try this.

http://www.audiocom-uk.com/Merchant2...e=AirCoreCU1.4

Better luck this time

Paul
Hi Pauil,
IMHO these are Xover inductors!
I wouldn´t use them in a high DC-Current Powersupply!
You may take a look at www.rs-components.com

C-R-C-C is what I use 3 times 22mF with a 0R22/25W Resistor
for Aleph2 -kind amps.

Uli
__________________

'Jazz is not dead, it just smells funny' F.Zappa
  Reply With Quote
Old 22nd January 2003, 11:24 PM   #14
diyAudio Member
 
SuppersReady's Avatar
 
Join Date: Oct 2002
Location: UK
Quote:
IMHO these are Xover inductors!
So are the inductors from Zalytron as I understand, yet I have seen these recommended regularly on this forum for PSU use. Hence my interest in these parts.

Have checked wire guage since, they don't seem much of a bargain anymore. Are there any more realistic UK sources out there? Net searches don't seem to produce many useable results.

Paul
  Reply With Quote
Old 25th January 2003, 08:35 PM   #15
diyAudio Member
 
SuppersReady's Avatar
 
Join Date: Oct 2002
Location: UK
I've never used inductors in my PSUs before hence my caution in selecting them. This inductor appears to give a good balance of price/DCR/wire guage. Shipping shouldn't be too bad from Europe.

?http://www.intertechnik.de/cgi-local/shop4/shop4_erg.pl?0&&Elektronikbauteile&&Spulen&&Rollen kernspulen&&none&&29

Article number:1340266

My question: Will these inductors be up the task if used in the PSU outlined at the beginning of this thread?

Help on this will be greatly appreciated!

Cheers

Paul
  Reply With Quote
Old 26th January 2003, 08:30 AM   #16
uli is offline uli  Austria
diyAudio Member
 
Join Date: Dec 2002
Location: Vienna, Austria
Thumbs up DC-current

Hi Paul,
normally those inductors (especially with some metallic core)
are NOT intended for use with heavy DC-current flowing thru
that device. But exactly this are you doing in a PSU. You can
build them on your own ore look for Switch mode PSU
inductors. www.hammondmfg.com/195.htm is a source for what you´re looking for...

Uli
__________________

'Jazz is not dead, it just smells funny' F.Zappa
  Reply With Quote
Old 26th January 2003, 10:16 AM   #17
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Default less used

Hi Paul,

You may have already decided how to do it, but for a C-L-C I would put all C after the L in the amp box. That way you have short wires to the load so the caps can source the best they can. The cabling between the amp and supply becomes part of the L, which will make the influence of the cable very small. The spikes and other junk filtered out by the L will actually appear across the L, so you want to keep that out of the amp box. Lastly, the first C will be close to the rectifiers so rectifier noise will be less likely to propagate throughout the system.

Jan Didden
  Reply With Quote
Old 27th January 2003, 05:47 AM   #18
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
It seems to me that putting some of the 2nd "C"
in the psu box will have at least one benefit, which
is that interupting the circuit won't generate a big
spike.

pass/ - getting sleepy after many posts, glasses of wine,
lounge music CD's
  Reply With Quote
Old 30th January 2003, 12:16 AM   #19
diyAudio Member
 
SuppersReady's Avatar
 
Join Date: Oct 2002
Location: UK
Thanks everybody,

Finally ordered the inductors after emailing wuffwaff who has used the same type without problems reported. Chose the Intertechnik luftspullen, 3.3mH. The DCR is high but since I'm using a 30-0-30 trafo I can lose a volt or two anyway.

Jan and NP, food for thought. Positioning of the caps re:spikes was not something I was aware of. Reading back through threads, some people argue for a small capacitance before choke followed by larger capacitance. This suggests that C-L-C-------C-C would offer the 'best' compromise.

Any thoughts?

Cheers

Paul
  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
rational approach traw Multi-Way 2 15th August 2006 08:39 AM
Active 2-way, best approach to x-over under 1k? Greggo Multi-Way 3 14th July 2006 05:52 PM
A different sub approach, will it work? Zero One Subwoofers 15 1st May 2006 04:06 AM
here's my approach hitsware Solid State 2 13th November 2004 05:54 AM


New To Site? Need Help?

All times are GMT. The time now is 05:43 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