Sub for 55N06 - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 October 2013, 03:59 PM   #1
diyAudio Member
 
Join Date: May 2011
Location: UK
Default Sub for 55N06

Hello,

I've got an amp that has shot 55N06s in the power supply. I have 70N06 or IRFZ44N but which would be the best to use?

Thanks
  Reply With Quote
Old 23rd October 2013, 04:39 PM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
What make/model amp or what type of drive circuit?
  Reply With Quote
Old 23rd October 2013, 04:43 PM   #3
diyAudio Member
 
Join Date: May 2011
Location: UK
Its an old PG XS2500 with an SG3525 driving MPSA56 & MPSA06.
  Reply With Quote
Old 23rd October 2013, 05:55 PM   #4
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
Hi Nick,
Original part should be STP60NE06 with 22.1 ohm gate resistors.Perhaps they have been replaced before or PG did a version change and subbed the part due to availability.
I would use the 70N06 devices myself if you have them. closest IRFZ would be IRFZ46 with IRFZ48 being even better. The totem pole drivers can handle it but the gate resistor might need adjustment if you see any problems with idle current draw once the amp is completely repaired....hope this helps some..
  Reply With Quote
Old 23rd October 2013, 05:55 PM   #5
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Either should work. The 70N06s will be a bit more rugged.
  Reply With Quote
Old 23rd October 2013, 06:34 PM   #6
diyAudio Member
 
Join Date: May 2011
Location: UK
Hey C.

They look to be the originals but I can see that someone has worked on this amp before but not in the power supply.

The gate resistors look to be 31.1R 1% so am I better off sticking with these or swapping them for a 22.1R?

You, Perry and all the other guys are always helpful. Click the image to open in full size.

Thanks
  Reply With Quote
Old 23rd October 2013, 08:18 PM   #7
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
My document is version correct, so if they are original then PG changed the gate resistor to 31.1 when they changed the fet to whats in there now. Give the 70N06's a shot and see if the gate drive is clean, and idle current draw is stable and expected. You should be fine I'm thinking. PG used 70N06's in a bunch of there TI gear with 33 ohm gate resistors and similar drive setup so I think your going to be good to go....
I'm worried as to why the fets blew in the first place. Are you sure the channels are good? Also look around the big caps and near the fuse holders to see if there is a blown trace under one of those caps or near the fuse holder < this is common with this sort of failure >. Also check the outputs just to be safe as I have rarely seen these fail a supply without the outputs being toast also....Have a good one Nick...
  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



New To Site? Need Help?

All times are GMT. The time now is 06:15 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