F5 power amplifier - Page 553 - 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 2nd November 2009, 08:41 PM   #5521
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Use some better BCs then
  Reply With Quote
Old 2nd November 2009, 08:44 PM   #5522
juma is offline juma  Germany
diyAudio Member
 
juma's Avatar
 
Join Date: Nov 2005
Location: Berlin
Quote:
Originally Posted by alazira View Post
....you are dealing with a newb who only bought his first multimeter in march......
I could bet it was in January
Never mind that, you just read slowly and carefully Mr. Pass' article on the subject (you might need to read it more than once) and it will dawn on you:
http://www.firstwatt.com/downloads/F...%20PassDIY.pdf

Have patience & have fun
  Reply With Quote
Old 2nd November 2009, 08:48 PM   #5523
juma is offline juma  Germany
diyAudio Member
 
juma's Avatar
 
Join Date: Nov 2005
Location: Berlin
Quote:
Originally Posted by umut1001 View Post
what should i do? ccivller says it works with bc546/556 but they couldnt work with them..when they pull out them F5 started to work
They were probably turned the wrong way around - ZTX's pinout differs from BC's...
  Reply With Quote
Old 2nd November 2009, 08:48 PM   #5524
alazira is offline alazira  United States
diyAudio Member
 
alazira's Avatar
 
Join Date: Jun 2007
Location: Las Vegas
Blog Entries: 1
Quote:
Originally Posted by Russellc View Post
Peter, is this aluminum the case (not the heat sink) is made from? Very nice.
I would like to build my F-5 similar to this example.

Russellc
Hi Russellc,

It's tough to find a case for the F5, much less one that looks like Peter Daniels'. I too liked his build and have finally put together an ugly sister (only one channel so far).

I searched eBay until I found appropriate sinks and aluminum bars from Home Depot along with a hacksaw/miter box (labor intensive). I also had to learn to drill & tap holes (not very difficult actually)

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 2nd November 2009, 08:52 PM   #5525
diyAudio Member
 
umut1001's Avatar
 
Join Date: Mar 2007
Location: Istanbul
Quote:
Originally Posted by tinitus View Post
Use some better BCs then
is it important to use a b or c types of BC547 / 557 ? what type should we use ?
  Reply With Quote
Old 2nd November 2009, 09:06 PM   #5526
diyAudio Member
 
Join Date: Dec 2004
Location: Sacramento, CA
Quote:
Originally Posted by sekess View Post
I am using some Hammond 159ZL chokes for the CLC power supply. With air core inductors I have read that the inductors should be mounted as far away from each other as possible (and/or at 90deg angles to each other) to minimize magnetic coupling.
When using the iron core Hammond chokes, is mounting proximity still an issue? Or, is it not that significant since more of the magnetic field will be concentrated atthe iron core?

Thanks,
Steve
Hello,
Could you or anyone else on this board comment on the audible differences (improvement) between an amp using chokes versus .1 ohm resistors in the amp PS?
Thanks,
David
  Reply With Quote
Old 2nd November 2009, 09:10 PM   #5527
sekess is offline sekess  United States
diyAudio Member
 
Join Date: Feb 2006
Location: NJ
Haven't finished building mine. So, I can't comment on it myself yet.

Steve
  Reply With Quote
Old 2nd November 2009, 09:12 PM   #5528
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
By the way, I don't recall mentioning that different Mosfets
have different temperature coefficients, for example the
temperature coefficient for Vgs of the Fairchild devices is
about twice that of the IR parts.

This means that temperature compensation is less necessary
for the IR parts.

Needless to say, other manufacturer's parts are likely to
vary also.

  Reply With Quote
Old 2nd November 2009, 09:15 PM   #5529
alazira is offline alazira  United States
diyAudio Member
 
alazira's Avatar
 
Join Date: Jun 2007
Location: Las Vegas
Blog Entries: 1
Quote:
Originally Posted by juma View Post
I could bet it was in January
Never mind that, you just read slowly and carefully Mr. Pass' article on the subject (you might need to read it more than once) and it will dawn on you:
http://www.firstwatt.com/downloads/F...%20PassDIY.pdf

Have patience & have fun
Hi Juma,

I am a very slow reader, but I have read this entire thread and the F5 article many times. The information I'm asking for isn't readily evident in those pages. In the past you've had helpful comments. Perhaps you could throw a bone out to this dog.

Garrett
  Reply With Quote
Old 2nd November 2009, 09:22 PM   #5530
Banned
 
Join Date: Nov 2006
Quote:
Originally Posted by Nelson Pass View Post
By the way, I don't recall mentioning that different Mosfets
have different temperature coefficients, for example the
temperature coefficient for Vgs of the Fairchild devices is
about twice that of the IR parts.

This means that temperature compensation is less necessary
for the IR parts.

Needless to say, other manufacturer's parts are likely to
vary also.

That is exactly what I found with my F5 build. It is rock steady after 20 minutes, no drift at all using IR parts
  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
Rockford Fosgate Power 20001 bd amplifier power rating?? pachoorion Car Audio 8 8th May 2011 11:49 PM
Power transformers versus amplifier output power..what is your option? destroyer X Solid State 38 9th May 2009 06:23 PM
McIntosh Power Amplifier Power Guard johnnyrt Solid State 2 23rd August 2007 11:22 PM
Output power for a power amplifier Progg70 Solid State 33 10th September 2006 09:44 AM
Amplifier 3000 Wats Rms Power + Smps Higcht Power Bestiality MARAVILLASAUDIO Class D 1 5th November 2004 05:06 PM


New To Site? Need Help?

All times are GMT. The time now is 10:07 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