My F5 Lives!!!!!!! - 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 6th April 2012, 12:52 AM   #1
diyAudio Member
 
Join Date: Feb 2002
Location: Canada
Default My F5 Lives!!!!!!!

First of all, Many, many thanks to Father Pass for sharing and inspiring such an interesting hobby.

Now to my first impressions. In my system the F5 has a warm and liquid midrange that gives this amp a very lifelike smoothness. But this smoothness comes at a price. The high end is softened and less detailed and lacks the sparkle of my gainclone. If I could restore this sparkle and detail without any accompanying glare this would take the F5 up a notch for me. I can also tell that the soundstage is deeper with the F5 with artists sounding farther back. All in all a very rewarding amp that is well worth the effort.

Now for something that puzzles me. After running the F5 for a few hours I realized I was running out of power. I find this very odd because I'm running line arrays that are about 95db efficient. Time for an F5 Turbo V3 or an F6?

Regards,
Dan
  Reply With Quote
Old 6th April 2012, 01:40 AM   #2
diyAudio Member
 
Join Date: Feb 2009
the sound will change over the next few days.
but run out of power? i have never run out of power. on 88db speakers.
  Reply With Quote
Old 6th April 2012, 01:57 AM   #3
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Quote:
Originally Posted by dantwomey
After running the F5 for a few hours I realized I was running out of power.
Check your bias. It might not be stable once things get all warm and toasty.
  Reply With Quote
Old 6th April 2012, 02:06 AM   #4
ra7 is offline ra7  United States
diyAudio Member
 
Join Date: Feb 2009
Blog Entries: 1
Running out of power means you need to provide a higher input signal. What preamp are you using? You need a whole 2.5V to drive it to full power, if you built it to spec. 95 db speakers should be no problem for the F5.
  Reply With Quote
Old 6th April 2012, 02:16 AM   #5
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
I thought it was 4v to full output... I could be wrong.
  Reply With Quote
Old 6th April 2012, 02:20 AM   #6
diyAudio Member
 
Join Date: Feb 2009
thats a lack of gain. when you run out of power, your amp has started clipping.
  Reply With Quote
Old 6th April 2012, 02:22 AM   #7
diyAudio Member
 
oneplustwo's Avatar
 
Join Date: Apr 2009
Location: San Francisco
No pictures?! How are we to know you actually joined this elite club?
  Reply With Quote
Old 6th April 2012, 02:34 AM   #8
a.wayne is offline a.wayne  United States
Sin Bin
 
Join Date: May 2008
Location: Front Row Center
Quote:
Originally Posted by AudioSan View Post
the sound will change over the next few days.
but run out of power? i have never run out of power. on 88db speakers.
Standard f5 or v2 .......?
  Reply With Quote
Old 6th April 2012, 02:40 AM   #9
diyAudio Member
 
Join Date: Feb 2009
thats a standar F5 with 30% higher bias. but stil +/-24V rails.

EDIT: F5v2. CViller boards. (not turbo v2)

Last edited by AudioSan; 6th April 2012 at 03:08 AM.
  Reply With Quote
Old 6th April 2012, 07:26 AM   #10
juma is offline juma  Germany
diyAudio Member
 
juma's Avatar
 
Join Date: Nov 2005
Location: Berlin
Quote:
Originally Posted by 6L6 View Post
I thought it was 4v to full output... I could be wrong.
There are volts and... volts
4V_peak = 2.8V_RMS
  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
Tetra lives!!!!! MrBurd Tubes / Valves 6 2nd October 2012 12:32 AM
She lives! Psychobiker Tubes / Valves 2 19th July 2008 11:49 PM
It lives! pjanda1 Chip Amps 1 21st May 2005 12:24 AM
How the other half lives harvey Everything Else 9 27th February 2003 12:55 AM
The Mini-A lives! Thomas Pass Labs 27 23rd November 2002 09:51 PM


New To Site? Need Help?

All times are GMT. The time now is 05:34 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