L/R Boards and Matched IRFP240 Boards for Aleph/ A-X - diyAudio
Go Back   Home > Forums > Commercial Sector > Swap Meet

Swap Meet Sell your stuff here, who knows, some other fanatic might be interested!

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 23rd May 2009, 04:04 AM   #1
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default L/R Boards and Matched IRFP240 Boards for Aleph/ A-X

I have not completed my Aleph X in 3 years so its time to part out the key parts.

For sale are 2 of the green L/R channel boards- stuffed with parts including black gate caps. These boards are wired in My A-X and I will desolder and/or cut the relevant wires to remove.

See the boards here. The missing components are on the opposite side.

Also for sale are the MOSFET boards.

Each of the 8 boards contains-

3 matched IRFP240 MOSFETs (how matched?? don't know I bought them years ago here and they were said to be matched)
3 pairs of Dale 1.2 ohm resistors in parallel
3 220 ohm gate resistors.

See this link for the pics of the output boards.

ONE of the output MOSFET boards is blown, all mosfets measure as shorts. The others measure fine. The Board is included, you need 3 more matched MOSFETS to install on the board.


The L/R channel boards appeared to work 3 years ago when I first powered up, but 3 of the output MOSFETs did blow and smoke emitted from the blown board. I believe the cause was overtightening the transistors under copper bars using arctic silver thermal compound that became conducting. But I'm just guessing.

I can say that each item for sale will give you a massive head start on an Aleph or Aleph X.


Price-

$70 including shipping for the left and right channel boards.
$40 including shipping for the MOSFET output boards.

This price is a small fraction of the cost of the parts that are on these boards.
__________________
Retired from DIY (2010) but still lurking now and again. My DIY audio projects- PartTimeProjects.com.
  Reply With Quote
Old 24th May 2009, 07:49 PM   #2
diyAudio Member
 
speakrsrfun's Avatar
 
Join Date: May 2005
Location: Toronto
Email me at Speakrsrfun at hotmail dot com, I'd like to talk....
__________________
What was that?... I can't hear you I have a line array filling my ears.
  Reply With Quote
Old 24th May 2009, 10:19 PM   #3
diyAudio Member
 
speakrsrfun's Avatar
 
Join Date: May 2005
Location: Toronto
I'd just like to know what confirguration this is set for output wise, I'll talk it over with my wife but more than likely I will take evrything here, output and L/R boards. If you would rather I email you just post here, Peace.
__________________
What was that?... I can't hear you I have a line array filling my ears.
  Reply With Quote
Old 25th May 2009, 03:12 AM   #4
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Quote:
Originally posted by speakrsrfun
I'd just like to know what confirguration this is set for output wise, I'll talk it over with my wife but more than likely I will take evrything here, output and L/R boards. If you would rather I email you just post here, Peace.

The configuration is here.

The boards actually are more complete than the ones shown; they have 3 terminal screw connector blocks installed for each mosfet output and also there is one for the input connection. I will post another pic.

You can email me or whatever, I'm available.
__________________
Retired from DIY (2010) but still lurking now and again. My DIY audio projects- PartTimeProjects.com.
  Reply With Quote
Old 25th May 2009, 02:56 PM   #5
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default more pics

here are some very large pics.

MOSFETs large

Boards (top) large

boards (bottom) large

You see all top quality components- Dale resistors, silver mica and black-gate caps in cricitical locations. Large terminal blocks (soldered and epoxyed in place) to connect your banks of output transistors.
__________________
Retired from DIY (2010) but still lurking now and again. My DIY audio projects- PartTimeProjects.com.
  Reply With Quote
Old 26th May 2009, 04:00 PM   #6
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default markings

Just to be clear, I have written 'shorted' on the mosfet board that measures no-good.
__________________
Retired from DIY (2010) but still lurking now and again. My DIY audio projects- PartTimeProjects.com.
  Reply With Quote
Old 20th August 2009, 03:27 PM   #7
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Hello everyone, these are still available.

There has been some interest from outside the USA. This is fine if you pay shipping, it would be helpful to give me an estimate if you know approximately how much it would be.
__________________
Retired from DIY (2010) but still lurking now and again. My DIY audio projects- PartTimeProjects.com.
  Reply With Quote
Old 25th August 2009, 04:56 AM   #8
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Still available.
__________________
Retired from DIY (2010) but still lurking now and again. My DIY audio projects- PartTimeProjects.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
FS Aleph-x boards woody Swap Meet 4 2nd September 2009 11:23 PM
FS: Conrad Heatsinks;.... 'PASS' B1 boards w/JFETS;...... F4 AMP & PSU boards cowboy99 Swap Meet 5 25th August 2009 02:39 AM
Pass Aleph 1.7 boards, Zhaolu 2.5A, P700 VRDS, UGS PS boards, dac chips analog_sa Swap Meet 4 14th March 2009 05:29 PM
matched FETS for aleph amps! (IRFP240's) cowanrg Swap Meet 10 5th February 2006 06:48 AM
matched irfp240 aleph 2 MikeZ Pass Labs 0 17th January 2003 08:42 PM


New To Site? Need Help?

All times are GMT. The time now is 08:04 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