F4 power amplifier - Page 290 - 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 25th April 2009, 06:55 PM   #2891
Liliya is offline Liliya  Norway
diyAudio Member
 
Join Date: Aug 2003
Location: 3370 Vikersund
Default My F4 and Aikido project

To power Aikido I use Bas PCB with some changes. I use chokes instead of regular resistors. The sound is very much to my taste.
Attached Images
File Type: jpg img_0096.jpg (56.0 KB, 1469 views)
  Reply With Quote
Old 25th April 2009, 06:57 PM   #2892
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Default @Liliya

real DIY

__________________
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 25th April 2009, 07:50 PM   #2893
Magura is offline Magura  Denmark
diyAudio Member
 
Magura's Avatar
 
Join Date: Oct 2003
Location: Denmark, Viborg
Default Re: @Liliya

Quote:
Originally posted by Zen Mod
real DIY





Magura
__________________
Everything is possible....to do the impossible just takes a little while longer.
www.class-a-labs.com
  Reply With Quote
Old 25th April 2009, 10:45 PM   #2894
Liliya is offline Liliya  Norway
diyAudio Member
 
Join Date: Aug 2003
Location: 3370 Vikersund
Default My F4 and Aikidoproject

Both channels into the chassis.
Attached Images
File Type: jpg img_0240.jpg (69.9 KB, 1467 views)
  Reply With Quote
Old 25th April 2009, 10:50 PM   #2895
Liliya is offline Liliya  Norway
diyAudio Member
 
Join Date: Aug 2003
Location: 3370 Vikersund
Default My F4 and Aikido project

A closer look at the FETs mounted with Norwegian crowns (money)
screws and nuts in brass.
Attached Images
File Type: jpg img_0239.jpg (51.0 KB, 1391 views)
  Reply With Quote
Old 25th April 2009, 11:03 PM   #2896
Liliya is offline Liliya  Norway
diyAudio Member
 
Join Date: Aug 2003
Location: 3370 Vikersund
Default My F4 and Aikido project

The next floor, the comlete Aikido stage, ready for mounting
Attached Images
File Type: jpg img_0241.jpg (72.6 KB, 1304 views)
  Reply With Quote
Old 25th April 2009, 11:06 PM   #2897
Liliya is offline Liliya  Norway
diyAudio Member
 
Join Date: Aug 2003
Location: 3370 Vikersund
Default My F4 and Aikido project

The Aikido stage well into the chassis. Its vry tight.
Attached Images
File Type: jpg img_0242.jpg (72.2 KB, 1252 views)
  Reply With Quote
Old 25th April 2009, 11:12 PM   #2898
Liliya is offline Liliya  Norway
diyAudio Member
 
Join Date: Aug 2003
Location: 3370 Vikersund
Default My F4 and Aikido project

With the frontplate on
Attached Images
File Type: jpg img_0244.jpg (51.7 KB, 1004 views)
  Reply With Quote
Old 25th April 2009, 11:33 PM   #2899
Liliya is offline Liliya  Norway
diyAudio Member
 
Join Date: Aug 2003
Location: 3370 Vikersund
Default My F4 and Aikido project

This is a very fine amplifier with at very big soundstage. The unit is ment to be take care of the 60- 600 Hz range on my
Magnepan 1.6 loudspeaker. The crossover is a DCX 2496(modded)


But I have a ripple problem in one channel.

I have started a new thread on this forum (Tubes): "Grounding Aikido and F4" where I try to describe this problem.

May be it would have been a better idea to ask other members
for help in this thread??

I do hope for some good adwises before my hair turn grey.
Attached Images
File Type: jpg img_0248.jpg (75.4 KB, 1035 views)
  Reply With Quote
Old 26th April 2009, 12:26 AM   #2900
diyAudio Member
 
luvdunhill's Avatar
 
Join Date: Jul 2006
Quote:
Originally posted by spencer
I have reduce the source resistor to 0.245 ohm (0.51//0.47) due to good match of the mosfets.
Did you just reduce the value of the source resistor until the voltage was a certain percentage different on all the MOSFETs? What's a good guideline on how different the voltage drop across resistors can be and still have good performance?
  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 05:53 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