Balanced F5 question - Page 60 - 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 20th November 2010, 09:42 AM   #591
diyAudio Member
 
Bksabath's Avatar
 
Join Date: Dec 2007
Hi there

I have been away for a while but not to far.

Enclosed copy of a first draft of the balanced F5 Triple
loads to do as make second half of pcb fatten & route tracks

Suply voltagge planed at 28V rails so components need sizing up

I have retained Nelson numbering.

AL
Attached Files
File Type: doc F5 TRiple Balanced HALF PCB.doc (52.0 KB, 163 views)
  Reply With Quote
Old 20th November 2010, 09:44 AM   #592
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
could the lead outs from the transformer all be flexible rather than enameled?
__________________
regards Andrew T.
  Reply With Quote
Old 20th November 2010, 09:47 AM   #593
EUVL is offline EUVL  Europe
diyAudio Member
 
Join Date: Oct 2003
Yes, but my experience is that you don't know what wire you get from them.

So I'd rather cut the enamel wire short and screw on a terminal block at the toroid, and use my own (normally silicon) wire from there.

If you want flexible wires we can ask whether he will do 2 of those as an exception.


Patrick
  Reply With Quote
Old 20th November 2010, 09:51 AM   #594
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
edited , just realized no can, i'll order separately

Last edited by qusp; 20th November 2010 at 09:54 AM.
  Reply With Quote
Old 20th November 2010, 09:58 AM   #595
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
Quote:
Originally Posted by EUVL View Post
Total dissipation per channel is 128W. Dropout loss in regulator or CRC 24W. Diode loss 16W. Min power requirement per channel = 168W. Factor of 3 to allow for high ripple current of Class A amp (see NP articles) = 504VA. Actually 0.8% undersized.

http://www.firstwatt.com/pdf/art_power_supplies.pdf

Case design has 350mm overall width. Conrad heatsinks 2x48mm. Some room for PCBs, wiring, etc, 2x50mm. Maximum width (diameter) of Tx = 154mm. Fits most commercially available 500VA Tx with about 5mm space left both sides.

Of course you can make your own decisions. That's why I said exemplary.

Patrick

.
do remember that richard makes these custom, so if the perfect number is 504va, ask him for 504va, i'm sure he will do it for the same price
  Reply With Quote
Old 20th November 2010, 10:03 AM   #596
EUVL is offline EUVL  Europe
diyAudio Member
 
Join Date: Oct 2003
> do remember that richard makes these custom, so if the perfect number is 504va, ask him for 504va, i'm sure he will do it for the same price

I think I can also live with an over-rating factor of 2.976 instead of 3.000.




Patrick
  Reply With Quote
Old 20th November 2010, 10:04 AM   #597
diyAudio Member
 
Join Date: Feb 2005
Thanks Patrick, understood - 500 VA.
__________________
... jh
  Reply With Quote
Old 20th November 2010, 10:07 AM   #598
EUVL is offline EUVL  Europe
diyAudio Member
 
Join Date: Oct 2003
No, 504VA !!!




Patrick

PS Just pulling your leg.....
  Reply With Quote
Old 20th November 2010, 10:07 AM   #599
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
I work from the other direction, and unsurprisingly arrive at the same answer.

The 500VA 16Aac transformer can supply 4Adc continuously using ~50% of it's maximum continuous capacity.

4Adc is sufficient to bias one channel of balanced F5x.
__________________
regards Andrew T.
  Reply With Quote
Old 20th November 2010, 10:09 AM   #600
EUVL is offline EUVL  Europe
diyAudio Member
 
Join Date: Oct 2003
Do you still want us to ask flex wires for you (only) ?

P.
  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
F5 bias question richD Pass Labs 12 4th March 2013 12:57 PM
F5 - Antek 4218 Wiring Question vdi_nenna Pass Labs 17 7th May 2011 12:05 AM
F2 and F5 heat question trusound Pass Labs 14 1st July 2010 02:28 PM
F5 Output Connection Question rtate Pass Labs 1 5th January 2010 11:58 PM
question re: sony ps-f5 portable turntable voicegyrl The Lounge 0 31st July 2008 09:36 PM


New To Site? Need Help?

All times are GMT. The time now is 05:18 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