Jim's Audio F5 power supply board - Page 4 - 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 24th March 2013, 11:39 AM   #31
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
I wouldn't mind doing it like this myself
Attached Images
File Type: jpg cap supply.jpg (297.8 KB, 458 views)
  Reply With Quote
Old 24th March 2013, 01:39 PM   #32
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
I am not inclined to agree.
I think the charging pulses into the first pair of smoothing caps must be resolved at the the first pair of zero volt connections.

The smaller value but longer charging pulses in the second pair should be resolved at the second pair zero volt connections.

The hopefully very small and almost continuous charging pulses of the third pair should be resolved at the third pair zero volt connections.
This cleanest zero volt connection is then taken to the Main Audio Ground.

But back to the input to that smoothing bank.
The two AC and the Centre tap must arrive as a close coupled triplet. This triplet should be very short in length and very low in loop area. i.e. the transformer secondary + rectifier + 1st pair smoothing MUST be VERY compact.
Then arrange the cabling to minimise loop area all the way from mains input right through to speaker output terminals.
__________________
regards Andrew T.
  Reply With Quote
Old 25th March 2013, 02:04 AM   #33
Hikari1 is offline Hikari1  United States
diyAudio Member
 
Join Date: Jun 2012
Location: Seattle
Andrew,

I believe this is what you are talking about.

Seems like Zen is trying to minimize potential grounding issues, you are trying to minimize potential RFI issues. Both would probably work...I have not decided what to do yet. But resistors will arrive this week so I have couple days to figure it out.
Attached Images
File Type: jpg 20130324_185035.jpg (134.3 KB, 414 views)
  Reply With Quote
Old 25th March 2013, 09:20 AM   #34
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
you have shown double connections from Zero volts1 (at the bottom) to Zero volts2 and again double connections from Zero volts2 to Zero volts3.
You need to add a centre tap connection to the bottom zero volts1.
You need to add a zero volts connection to each amplifier channel. This connection must go to the MAG. The MAG must be located to minimise hum.

Although your diagram is "opened up" to make it readable, I recommend that all the "open" loops be closed down such that every flow and return pair are close coupled.
__________________
regards Andrew T.

Last edited by AndrewT; 25th March 2013 at 09:27 AM.
  Reply With Quote
Old 4th December 2013, 10:35 PM   #35
diyAudio Member
 
Join Date: Aug 2009
Default Resistors ?

Wrong post.....

Last edited by tjolle62; 4th December 2013 at 10:39 PM.
  Reply With Quote
Old 4th December 2013, 10:41 PM   #36
diyAudio Member
 
Join Date: Aug 2009
Sorry for asking but what kind of resistor do you using on that board ?
I have the same but its no resistors mounted and i dont know what to use.
  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
Stolen Trademark Amplifier from Jim's Audio on EBAY crazycloud Solid State 505 14th September 2014 12:41 PM
Jim's Audio Goldmund Telos 390 clone Tyimo Solid State 9 5th March 2013 02:28 AM
Jim's Audio F5 referenced kit. HiVi Guy Pass Labs 21 22nd November 2012 10:24 AM
Universal power supply board for audio amplifier siliconray Siliconray Online Electronics Store 11 13th February 2012 05:24 AM


New To Site? Need Help?

All times are GMT. The time now is 05:28 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