F5 Turbo Circuit Boards - Page 146 - 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 8th May 2012, 05:08 PM   #1451
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
Blog Entries: 7
George
But the Dad was great.
  Reply With Quote
Old 8th May 2012, 05:27 PM   #1452
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Andrew is.....NEWMAN!

Favorite Costanza quote:

"If everything thing I say is wrong, The opposite must be right!"

This is hitting a little too close to home for me
__________________
...Shape the sound , Man!

Last edited by buzzforb; 8th May 2012 at 05:40 PM.
  Reply With Quote
Old 9th May 2012, 01:04 AM   #1453
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
FQA comparison.
Measured across .1R 1% source resistor.
Attached Files
File Type: doc FQA comparison.doc (46.0 KB, 55 views)
__________________
...Shape the sound , Man!

Last edited by buzzforb; 9th May 2012 at 01:09 AM.
  Reply With Quote
Old 9th May 2012, 02:02 AM   #1454
lhquam is offline lhquam  United States
diyAudio Member
 
Join Date: Mar 2010
Location: Olalla, Oregon: Land of the 100 Valleys
Quote:
Originally Posted by buzzforb View Post
FQA comparison.
Measured across .1R 1% source resistor.
How come I cannot find anything about FQA16N5C. I get some hits on FQA16N50.
  Reply With Quote
Old 9th May 2012, 02:24 AM   #1455
Rush is offline Rush  United States
diyAudio Member
 
Join Date: Sep 2009
Location: Tampa, Florida
Quote:
Originally Posted by lhquam View Post
How come I cannot find anything about FQA16N5C. I get some hits on FQA16N50.
Try FQA16N25C
  Reply With Quote
Old 9th May 2012, 02:48 AM   #1456
imix500 is online now imix500  United States
Proud Union Member
diyAudio Member
 
imix500's Avatar
 
Join Date: Mar 2004
Location: Nashville, TN
Hello all,
First off just want to apologize. I somehow completely missed the few posts after my last about PSU diode heatsink temps. The discussion has obviously evolved several subjects since then.

So, I have input jets with an Idss of 7.1mA Should I go ahead and make the component changes to accommodate the lower values? Or, should I use the default values and see if I run into issues.
If yes to new components- I have read of changing R3,R4 to a lower value or changing P1,P2 to 10k.
Is one method better than the other?
  Reply With Quote
Old 9th May 2012, 07:48 AM   #1457
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Quote:
Originally Posted by imix500 View Post
Hello all,
First off just want to apologize. I somehow completely missed the few posts after my last about PSU diode heatsink temps. The discussion has obviously evolved several subjects since then.

So, I have input jets with an Idss of 7.1mA Should I go ahead and make the component changes to accommodate the lower values? Or, should I use the default values and see if I run into issues.
If yes to new components- I have read of changing R3,R4 to a lower value or changing P1,P2 to 10k.
Is one method better than the other?
I woul lean towards lower Rs over bigger pot, but either will work.
__________________
...Shape the sound , Man!
  Reply With Quote
Old 9th May 2012, 03:47 PM   #1458
imix500 is online now imix500  United States
Proud Union Member
diyAudio Member
 
imix500's Avatar
 
Join Date: Mar 2004
Location: Nashville, TN
Ok, in that case how much lower do I want to go? Does a little go a long way?
  Reply With Quote
Old 9th May 2012, 05:53 PM   #1459
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
See if you run into trouble. My guess is you will have max Vgs of about 3-3.5V. You could p arallel another 10r across current one and remeasure and see what that gets you. Just tak eth eoppportunity to play, experiment and learn. We will all be here to laugh at you and help you. If it gets bad, i hav eplenty of sad buildin gstories to cheer you up. Just yesterday i blew up a resistor. Quite impressiv ereally. Who would have thought you needed glasses for this sort of thing
__________________
...Shape the sound , Man!
  Reply With Quote
Old 9th May 2012, 08:37 PM   #1460
nrg2009 is offline nrg2009  United States
diyAudio Member
 
Join Date: Apr 2009
Location: Detroit, born and raised in the netherlands.
ha ha!! Buzzforb, you are right on with that last post!! We need a good laugh once in a while.
  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 clone boards (inc PSU boards) Tazzz Swap Meet 39 7th June 2014 07:02 AM
F5 Turbo is posted Nelson Pass Pass Labs 635 6th April 2014 10:51 AM
F5 turbo problems Rob Dingen Pass Labs 17 11th January 2013 08:38 PM
F5 Turbo ............. if only !!!!!! a.wayne Pass Labs 23 21st January 2012 02:24 AM
UGS Boards and F5 boards DUC985 Swap Meet 0 7th January 2009 07:21 PM


New To Site? Need Help?

All times are GMT. The time now is 02:35 AM.


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