Chokes next to output transformers? - 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 6th January 2009, 09:13 PM   #1
diyAudio Member
 
Rob11966's Avatar
 
Join Date: Jun 2007
Location: Australia
Default Chokes next to output transformers?

Hi Folks,

I am just working on the layout of my 845 amp and need a little advice.

The filament supply is DC and uses Hammond 159ZJ chokes (http://www.audiodesignguide.com/New845/New845v2.html).

I am finding the layout problematic for various reasons (heat dissipation, the number of transformers etc) and the 'best' physical layout places the three filament supply chokes adjacent to the output transformers. I think this should be OK - what do people think?

I have included a rough drawing of this part of the layout with the winding direction indicated by the lines.

Thanks for the opinion.

Rob
Attached Images
File Type: jpg transformers.jpg (7.8 KB, 239 views)
  Reply With Quote
Old 7th January 2009, 05:18 AM   #2
diyAudio Moderator Emeritus
 
ray_moth's Avatar
 
Join Date: Jan 2004
Location: Jakarta
I wouldn't expect there to be any major induction between the chokes and the OP transformers, especially since your diagram seems to indicate that the choke cores will be at 90 degrees to the OPT cores. That's a long-winded way of saying that I think it should be OK.
  Reply With Quote
Old 7th January 2009, 06:32 AM   #3
diyAudio Member
 
Join Date: Oct 2004
Location: Maui, Hawai'i, USA
Whut Ray sez, with one provision.  If this is not the input choke in a choke-input PS filter, you're in.  It is my understanding that if you use a choke-input filter (the first element after the rectifier is the choke), that first choke has a very mongo AC input, and can be making some serious field.  Otherwise, build and enjoy.

Aloha,

Poinz
  Reply With Quote
Old 7th January 2009, 08:18 PM   #4
diyAudio Member
 
Rob11966's Avatar
 
Join Date: Jun 2007
Location: Australia
Thanks Ray_moth.

Hi Poinz, there is a cap before the choke, so it looks like it should be OK.

Cheers,

Rob
  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
Need output chokes for power acoustick a2400db ppia600 Car Audio 11 4th September 2009 01:43 AM
Help identifying a pair of output transformers and power transformers mjk130 Parts 3 30th January 2009 10:44 AM
Transformers as chokes woody Everything Else 0 16th December 2007 04:58 PM
where to buy parts (transformers and chokes) soundbadger Tubes / Valves 9 30th October 2007 08:08 PM
Useful Supplier of Transformers, Chokes, Chassis and other stuff poynton Tubes / Valves 0 2nd February 2007 10:48 AM


New To Site? Need Help?

All times are GMT. The time now is 03:25 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