Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

Need matched IRFP240's, IRFP9240's, 2SK370's... Or not?
Need matched IRFP240's, IRFP9240's, 2SK370's... Or not?
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 12th May 2008, 07:44 PM   #1
giacomo_pagani is offline giacomo_pagani  Italy
diyAudio Member
 
Join Date: Sep 2007
Send a message via MSN to giacomo_pagani
Default Need matched IRFP240's, IRFP9240's, 2SK370's... Or not?

My F4 adventure goes on... After solving the heatsinks issue, next thing I'm in trouble with is the gain devices.

The First Watt F4 sports 3 IRFP240, 3 IRFP9240 and 2 2SK370 per channel. Now... I don't really know if I need matched devices, nor which ones must be matched together.

While looking for them on MOUSER and Farnell, I also discovered that the price isn't so popular after all... 2-4 USD per device, it becomes not-so-cheap when you have to buy a lot to match 'em. I really need some advice, here. I also would be willing to buy them from some of you guys, if you have the matched devices I need.

Both explanations about what I need, what to be matched, and any kind of offerings, are truly appreciated.

Thank you so much.

Giacomo
  Reply With Quote
Old 12th May 2008, 08:31 PM   #2
twitchie is offline twitchie  Burkina Faso
diyAudio Member
 
Join Date: Jul 2004
Location: Planet Earth
http://www.diyaudio.com/forums/showt...hreadid=103891
  Reply With Quote
Old 12th May 2008, 08:35 PM   #3
twitchie is offline twitchie  Burkina Faso
diyAudio Member
 
Join Date: Jul 2004
Location: Planet Earth
Here's a tip:

Ask the moderators to collect all your F4 build posts into a single thread and have it titled "My F4 build thread" or something like that. This way, all your related questions can be directed in that single thread instead of opening a new thread for each of your questions.

Since you need to click and acknowledge you searched before posting, I suggest you also abide by that instead of just clicking it to get your thread posted. Matched devices questions come up very frequently and there are numerous members who offer device matching in Europe as well as North America.

Best wishes with your build and despite what I say above, don't be shy about asking questions ... just do it in an organized way and you'll find more than enough help
  Reply With Quote
Old 12th May 2008, 08:58 PM   #4
giacomo_pagani is offline giacomo_pagani  Italy
diyAudio Member
 
Join Date: Sep 2007
Send a message via MSN to giacomo_pagani
Thank you twichie, the point is that everything started with the idea of "evaluating" the situation, then it became an actual work, and I have fragmented the various phases in these almost-useless threads. I sure do some research, usually, but this time I felt that my question of the three different devices would have been a bit "particular"... Forgetting that many F4-builders could have had the exact same idea before.

My apologizes for that.

I'll now check that thread, thank you again.

Giacomo
  Reply With Quote
Old 13th May 2008, 04:06 PM   #5
GuidoR is offline GuidoR  Italy
diyAudio Member
 
GuidoR's Avatar
 
Join Date: Jun 2006
Location: Bergamo
Hi Giacomo,
I also am currently building a F4, and I have most of the thingies you need. please send me an e-mail and I will give you some informations.
Oh, I just forgot, I live in Bergamo, just a couple of steps from your home...

Guido
  Reply With Quote
Old 13th May 2008, 04:09 PM   #6
GuidoR is offline GuidoR  Italy
diyAudio Member
 
GuidoR's Avatar
 
Join Date: Jun 2006
Location: Bergamo
oops!
I forgot to activate my e-mail.
Now I think it's on
  Reply With Quote
Old 13th May 2008, 04:10 PM   #7
giacomo_pagani is offline giacomo_pagani  Italy
diyAudio Member
 
Join Date: Sep 2007
Send a message via MSN to giacomo_pagani
This is really great, Guido.

I write you on p.m.

Ciao!
Giacomo
  Reply With Quote

Reply


Need matched IRFP240's, IRFP9240's, 2SK370's... Or not?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
IRFP240/IRFP9240 Power amp JojoD818 Solid State 92 3rd October 2009 06:05 PM
IRFP240 / IRFP9240 MOSFETs danieljw Swap Meet 8 4th July 2009 02:51 AM
Wtb: Irfp240 / Irfp9240 folkeb Swap Meet 1 10th March 2009 11:18 AM
IRFP240 + IRFP9240 -- pairs jackinnj Swap Meet 1 2nd June 2006 03:22 AM
IRFP240 and IRFP9240 Wanted richeros Swap Meet 1 9th November 2002 01:38 PM


New To Site? Need Help?

All times are GMT. The time now is 05:01 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki