replacement mosfet recomendations?? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 15th February 2009, 09:18 PM   #1
diyAudio Member
 
Join Date: Sep 2004
Location: coventry england
Send a message via Yahoo to psychosteve
Default replacement mosfet recomendations??

i have 3 pair of mosfet amps with 2sk135 / 2sj50 output pairs.

i need to recase the amps all into one case, and was looking into replacing the mosfets with to218 or similar package units.

i was looking at 2sj200 / 2sk1529 at 3.50 / 4.00 each from cricklewood.

any other recomendations or suggestions?

cheers guys, steve.
__________________
you all laugh because im different, i laugh because youre all the same.. ..
  Reply With Quote
Old 15th February 2009, 09:56 PM   #2
Account disabled at member's request
 
Join Date: May 2006
I wouldnt suggest 2sj200 and complement at all, those are vertical mosfets, well thats how they behave, they need thermal compensation that lateral mosfets dont, the 2sj50 and compl are lateral mosfets. Does you amps have a vbe multiplier???

Check out profusion plc in uk for suitable lateral replacements, also classd in uk have some lateral mosfets at more reasonable prices.
  Reply With Quote
Old 15th February 2009, 10:07 PM   #3
diyAudio Member
 
Join Date: Sep 2004
Location: coventry england
Send a message via Yahoo to psychosteve
sorry should have posted schem.
Attached Images
File Type: png 100-150w mos amp.png (7.3 KB, 700 views)
__________________
you all laugh because im different, i laugh because youre all the same.. ..
  Reply With Quote
Old 15th February 2009, 10:11 PM   #4
Account disabled at member's request
 
Join Date: May 2006
Theres no mosfets in that schematic.
  Reply With Quote
Old 15th February 2009, 10:17 PM   #5
diyAudio Member
 
Join Date: Sep 2004
Location: coventry england
Send a message via Yahoo to psychosteve
another ps, please ignore all the transistor and mosfet part numbers, i only knocked this up in about 10 minutes and didnt realy pay attention.

q6 q7, input pair, 2sa872a

q3 q4, 2sd756

q5, 2sb716

q1 q2, 2sk135 2sj50
__________________
you all laugh because im different, i laugh because youre all the same.. ..
  Reply With Quote
Old 15th February 2009, 10:22 PM   #6
Account disabled at member's request
 
Join Date: May 2006
Yep, no thermal compensation, have to use laterals, have a look at classd company in uk, they have some decent looking and cheap laterals, if you are not going to use those older hitachi mosfets sell them here on the forum, many looking for those.
  Reply With Quote
Old 15th February 2009, 10:42 PM   #7
diyAudio Member
 
Join Date: Sep 2004
Location: coventry england
Send a message via Yahoo to psychosteve
ACD102PSD and ACD100NSD Lateral Mosfets from class d look ok and are slightly cheaper where these the ones you where thinking of?

http://www.classd.ltd.uk/product.php...4&cat=0&page=1

cricklewood have the 2sj50 and the 2sk135 t03, if any one needs them.

thanks for the help, steve.
__________________
you all laugh because im different, i laugh because youre all the same.. ..
  Reply With Quote
Old 15th February 2009, 11:22 PM   #8
Account disabled at member's request
 
Join Date: May 2006
Yes, please note I dont have experience with those mosfets, but they are manufactured by a reputable company so cant be bad. For other choices look at profusion plc, but be prepared to pay double the price as laterals are not cheap.

Dont think anyone would be easily swayed to purchase those from cricklewood, they were discontinued ages ago and theres plenty of fakes around, cricklewood is known to pass one here and there.
  Reply With Quote
Old 15th February 2009, 11:59 PM   #9
diyAudio Member
 
Join Date: Aug 2008
I have a commercial power amp here using the 2sJ200 / 2sk1529 and the output pair on one side have gone s/c. Given that these originals are obsolete, what can you recommend as viable, reliable replacements that won't be likely fakes?
  Reply With Quote
Old 16th February 2009, 02:32 AM   #10
Account disabled at member's request
 
Join Date: May 2006
Are they obsolete??? Im not sure that they are, they not easily available but Im pretty sure you can get some to fix your amp. There are many vertical mosfets around you could use ,theres plenty talk here of irfp240 and irfp9240 but Id go for originals. Try dalbani in Uk, should have them, but be prepared to pay a few pounds.
  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
Mosfet replacement palesha Solid State 8 25th January 2011 09:41 PM
Mosfet Replacement seafire Solid State 8 6th March 2009 05:47 AM
Mosfet Compatible Replacement JhonDoe Parts 2 30th January 2009 12:16 AM
RF Power 300 Mosfet, replacement FETs Mike1008 Car Audio 1 6th June 2006 05:34 PM
MOSFET replacement carlmart Solid State 0 9th October 2001 11:13 PM


New To Site? Need Help?

All times are GMT. The time now is 06:10 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