F4 power amplifier - Page 163 - 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 December 2007, 07:37 PM   #1621
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
Match the NNN and the PPP. Don't worry so much about the N and P having the same values.

Purchase a bunch and match your own. This gives you experience and spares.
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 2nd December 2007, 07:41 PM   #1622
diyAudio Member
 
Andrzej Sochon's Avatar
 
Join Date: Nov 2007
Location: Warsaw
Quote:
Originally posted by carpenter
another
.

I see a black heatsink with diodes. Are the diodes hot?
a.
  Reply With Quote
Old 2nd December 2007, 07:47 PM   #1623
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
diodes are cold as a well digger's butt
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 2nd December 2007, 09:25 PM   #1624
Vix is online now Vix  Yugoslavia
diyAudio Member
 
Vix's Avatar
 
Join Date: Nov 2003
Location: Somewhere on Planet Earth
Quote:
Originally posted by carpenter
Here's a Wakefield 392-300AG heatsink given to me from a fellow carpenter. He had no idea what it was, but thought I might be able to put it to good use.

I purchased a mate for it at a cost of $160.00. This will be my first F4. For the rest of the F4s, I'm going to play with water cooling.

Caps in PS are 47,000uF each.

Ugly!

(Choky will wait until you post a pic of a finished amp and present it in its full ugliness )

p.s. In the dark,it doesn't matter if its ugly or not, as long as it sounds good!
  Reply With Quote
Old 2nd December 2007, 09:32 PM   #1625
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
Quote:
Originally posted by Vix
p.s. In the dark,it doesn't matter if its ugly or not, as long as it sounds good!
So true; I've been told that the same can be said of the person in our bed, sleeping next to us...
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 2nd December 2007, 09:41 PM   #1626
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
woodie
please use metal screws for output fets ; these plastic ones are just begging for bubble gum effect ....... then pufff!
__________________
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 2nd December 2007, 09:48 PM   #1627
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
Quote:
Originally posted by Zen Mod
woodie
please use metal screws for output fets ; these plastic ones are just begging for bubble gum effect ....... then pufff!

Wouldn't that actually be at least pufff, pufff, puff ?


Magura
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote
Old 2nd December 2007, 10:55 PM   #1628
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally posted by Magura



Wouldn't that actually be at least pufff, pufff, puff ?


Magura




next we'll see woodie's BFR91 amp ..............

__________________
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 2nd December 2007, 11:36 PM   #1629
Paper mache horn fabricator
diyAudio Member
 
carpenter's Avatar
 
Join Date: Mar 2002
Location: Oregon City, Oregon
You guys are funny...

Metal screws carry the fet tab through the mica and into the heatsink, thereby causing a direct short!
__________________
I enjoy audio so much that I constructed a web site. I share my ideas at: www.inlowsound.com
  Reply With Quote
Old 2nd December 2007, 11:38 PM   #1630
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
Quote:
Originally posted by carpenter
You guys are funny...

Metal screw carry the fet tab through the mica and into the heatsink, thereby causing a direct short!

Which is why you use an insulator for the bolt

Really, the nylon bolts are going to give up the ghost sooner than you expect.


Magura
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  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 10:49 PM
Power transformers versus amplifier output power..what is your option? destroyer X Solid State 38 9th May 2009 05:23 PM
McIntosh Power Amplifier Power Guard johnnyrt Solid State 2 23rd August 2007 10:22 PM
Output power for a power amplifier Progg70 Solid State 33 10th September 2006 08:44 AM
Amplifier 3000 Wats Rms Power + Smps Higcht Power Bestiality MARAVILLASAUDIO Class D 1 5th November 2004 04:06 PM


New To Site? Need Help?

All times are GMT. The time now is 05:35 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