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 18th August 2012, 05:56 PM   #1
diyAudio Member
 
Join Date: Jan 2012
Location: Pittsburg,CA
Default Rockford Fosgate Punch 30HD Transistors

Can anyone give me the datasheets or replacements for the SS256S and SS257S. Also the SS112S and the SS114S. I have not been able to find any info on these transistors since they are over twenty two years old.
any info would be informative.
  Reply With Quote
Old 18th August 2012, 06:05 PM   #2
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
I have not worked on one in quite awhile, but if memory serves I replaced them with IRF540 and IRF9540.
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch
  Reply With Quote
Old 18th August 2012, 06:37 PM   #3
diyAudio Member
 
Join Date: Jan 2012
Location: Pittsburg,CA
Thanks I do have some of them.
  Reply With Quote
Old 18th August 2012, 06:57 PM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
I don't know how many versions of this amp there are but in the 30HDs that I've seen the power supply transistors were NPN bipolar transistors. I think I used 2N6488s in them.

540s and 9540s are OK for audio. The 540s will be the ones nearest the RCA end of the board.
  Reply With Quote
Old 19th August 2012, 12:15 AM   #5
diyAudio Member
 
Join Date: Jan 2012
Location: Pittsburg,CA
Thanks Perry, how about the power supply?
The SS112S and SS114S are used here.
Thanks Richard
  Reply With Quote
Old 19th August 2012, 12:23 AM   #6
diyAudio Member
 
Join Date: Jan 2012
Location: Pittsburg,CA
Just looked up complment to the 2N6488, a 2N6491 PNP should work.
Thanks
  Reply With Quote
Old 19th August 2012, 02:51 AM   #7
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The 112s are the 6488s. The 114 is an MJE3055. Those are the power supply components. There are no PNP bipolar transistors clamped to the sink in this amp.

If you check the originals, they should check like a bipolar transistor.
  Reply With Quote
Old 19th August 2012, 04:07 PM   #8
diyAudio Member
 
Join Date: Jan 2012
Location: Pittsburg,CA
Does anyone have a schematic for this unit? The one I got from Rockford is unreadable, tried to clean it up with no sucess.
  Reply With Quote
Old 12th March 2013, 02:04 PM   #9
diyAudio Member
 
Join Date: Sep 2010
Quote:
Originally Posted by Perry Babin View Post
The 112s are the 6488s. The 114 is an MJE3055. Those are the power supply components. There are no PNP bipolar transistors clamped to the sink in this amp.

If you check the originals, they should check like a bipolar transistor.
sorry for bringing up an old subject, but i have a coulpe of these on my bench... I was wondering what did you have to change the gate resistor value to.
  Reply With Quote
Old 13th March 2013, 02:58 AM   #10
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
These components are not FETs so there are no 'gate' resistors.

Please start a new thread if you have any other questions regarding your amp.
  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 Punch 150 mike49504 Car Audio 3 22nd May 2012 03:31 AM
Rockford Fosgate Punch 75HD seankane Car Audio 5 18th July 2011 12:49 AM
Rockford Fosgate Punch 800a2 seankane Car Audio 3 25th June 2011 05:18 AM
rockford fosgate punch z stevena2006 Car Audio 2 23rd December 2009 04:20 PM
Rockford Fosgate Punch 360a2 dawkins Car Audio 1 6th April 2006 05:27 PM


New To Site? Need Help?

All times are GMT. The time now is 03:17 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