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

Instruments and Amps Everything that makes music, Especially including instrument amps.

Marshall 2525
Marshall 2525
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 November 2019, 10:06 AM   #1
akkar is offline akkar  Italy
diyAudio Member
 
Join Date: Aug 2010
Default Marshall 2525

Hello everyone,

does someone has a Marshall 2525 schematic?

Thanks
  Reply With Quote
Old 19th November 2019, 02:24 PM   #2
Printer2 is offline Printer2  Canada
diyAudio Member
 
Join Date: Apr 2010
Something similar?


http://www.guitarampsusa.com/Documentation/2525.jpg
  Reply With Quote
Old 19th November 2019, 03:26 PM   #3
akkar is offline akkar  Italy
diyAudio Member
 
Join Date: Aug 2010
I don't know honestly

Looking at the original manual, I see it features High/Low output switching (20 Watt to 5 Watt) that I don't see in the Ceriatone version.

Ceriatone has bright, rhyhtm clip, channel select switches that the original one doesn't have
  Reply With Quote
Old 19th November 2019, 05:42 PM   #4
Printer2 is offline Printer2  Canada
diyAudio Member
 
Join Date: Apr 2010
So modify it for whatever you want.
  Reply With Quote
Old 19th November 2019, 06:11 PM   #5
akkar is offline akkar  Italy
diyAudio Member
 
Join Date: Aug 2010
I'm interested in how actually they designed that, in particurarly the power control switch.

Thanks for the suggestion though
  Reply With Quote
Old 19th November 2019, 06:23 PM   #6
leadbelly is online now leadbelly  Canada
diyAudio Member
 
leadbelly's Avatar
 
Join Date: Dec 2002
Location: Calgary, Alberta
I believe the 2525 is based on the 2555, whose schematic can be found. Of course, it will take a little work to go from 4xEL34 to 2x6V6.
__________________
No one wants advice - only corroboration.
John Steinbeck
  Reply With Quote
Old 19th November 2019, 06:31 PM   #7
Printer2 is offline Printer2  Canada
diyAudio Member
 
Join Date: Apr 2010
Quote:
It's a type of power scaling on the mini. The plate voltage is about 280 on 20 watts and about 175 on 5 watts. On the 2555x and the original series the low power was pentode triode switching. The power scaling approach doesn't change the tone much, but triode sounds different from pentode.

Mini Jubilee 2525h | Page 2 | MarshallForum.com
  Reply With Quote
Old 19th November 2019, 06:39 PM   #8
akkar is offline akkar  Italy
diyAudio Member
 
Join Date: Aug 2010
Mmmm so they use a different technique than the pentode/triode of the 2555
  Reply With Quote
Old 19th November 2019, 07:33 PM   #9
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
diyAudio Member
 
JonSnell Electronic's Avatar
 
Join Date: Dec 2012
Location: The Jurassic Coast, England. GB
The 2555 uses a Triode/Pentode switch, nothing else so it only reduces the gain but achieves a similar power output when over driven into class AB2.
The 2525 uses a reduced HT switch. That's it.
I will not share a schematic as I am a Marshall repairer and agreed to keep their copyright material confidential.
__________________
Support for Fender, Marshall and all Valve Equipment; Audio Innovations, Audiorama FU29, Quad and Leak. www.jonsnell.co.uk
  Reply With Quote
Old 19th November 2019, 08:38 PM   #10
Printer2 is offline Printer2  Canada
diyAudio Member
 
Join Date: Apr 2010
Not really sure how the 2555 can get driven into AB2, the PI is capacitor coupled. Maybe the triode switch?
  Reply With Quote

Reply


Marshall 2525Hide 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
Marshall 18W TA Eagle941 Instruments and Amps 4 14th November 2014 03:45 PM
RIP Dr Jim Marshall Dagnall Electronics In Memoriam 12 7th April 2012 06:14 PM
take apart marshall guv'nor + chriz74 Instruments and Amps 4 23rd August 2011 04:51 AM
HA-2525 OP Amps Ardvaark Solid State 1 18th July 2009 06:18 PM
mg 100 dsp marshall amp topkat Chip Amps 0 24th October 2006 11:31 PM


New To Site? Need Help?

All times are GMT. The time now is 06:25 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki