First Pass Labs project a few simple questions.... - 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 27th January 2011, 08:31 PM   #1
Boscoe is offline Boscoe  United Kingdom
diyAudio Member
 
Join Date: Feb 2010
Location: England
Default First Pass Labs project a few simple questions....

As they are very simple to make because of the few components and because I have no clue about Pass Labs and want to learn I wanted to have a go at an F5 amp following Nelson's design:

Click the image to open in full size.

So what do I use for Q1,Q2,Q3 and Q4? I realise Q3 and Q4 are the output devices, I want to achieve about 50W/ch is this possible and what input voltage would be recommended?

Thanks
Boscoe
__________________
I thought about it once, but then thought again.
  Reply With Quote
Old 27th January 2011, 08:57 PM   #2
diyAudio Member
 
Holger Barske's Avatar
 
Join Date: Jan 2001
Location: Ruhrgebiet
You perhaps should turn another two pages from that F5 manual, then you'll see the bright light
__________________
Best regards: Holger
www.holgerbarske.com - Deutschsprachiges Paradise-Support-Forum
  Reply With Quote
Old 27th January 2011, 09:09 PM   #3
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 27th January 2011, 09:19 PM   #4
Boscoe is offline Boscoe  United Kingdom
diyAudio Member
 
Join Date: Feb 2010
Location: England
Hmm just read through the manual, certainly explains why the rather large heatsinks used in the builds in this thread! For a 24W amp 60W dissipated!!!
__________________
I thought about it once, but then thought again.
  Reply With Quote
Old 27th January 2011, 09:28 PM   #5
ra7 is offline ra7  United States
diyAudio Member
 
Join Date: Feb 2009
Blog Entries: 1
While you're at it, also read all the zen variations from passdiy.com

The answers to most of the questions you will have can be found in one or the other zen articles. In fact, the whole zen compilation is a great resource for beginner amp building.... another one of those genius things that Papa has created.
  Reply With Quote
Old 27th January 2011, 09:35 PM   #6
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
welcome to A class

try ..... and you'll never look back

__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 27th January 2011, 09:48 PM   #7
Boscoe is offline Boscoe  United Kingdom
diyAudio Member
 
Join Date: Feb 2010
Location: England
Quote:
Originally Posted by Zen Mod View Post
welcome to A class

try ..... and you'll never look back

I think I won't know. Looking at the F5 stats apart from inefficiency which can be dealt with why build any other amp? There's power great quality so simple has a massive frequency range with very low levels of THD!!
__________________
I thought about it once, but then thought again.
  Reply With Quote
Old 27th January 2011, 09:53 PM   #8
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
there is ( usually ) more than just one way to Rome ...... even if all of them are leading to it ....

__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 28th January 2011, 12:57 AM   #9
diyAudio Member
 
Join Date: Aug 2008
ZM, you're hogging all the insight
  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
Pass Labs B4 crossover questions nicksgem10s Pass Labs 95 10th June 2014 08:00 PM
Pass Labs amp combination for Thiel speakers, need Mr Pass' advice ! And everyone... JulienG Pass Labs 80 14th February 2013 06:22 PM
Conrad Johnson PV-5, my next project, some simple questions Razorblade Tubes / Valves 32 18th March 2010 09:17 PM
Pass Labs BZLS and Aleph 2 Clone project for sale qwertyl Swap Meet 0 9th September 2008 04:11 PM
My opinion on Pass Labs and Mr. Pass (Nelson) himself b_online Pass Labs 11 21st May 2003 01:39 AM


New To Site? Need Help?

All times are GMT. The time now is 06:08 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