roland jazz chorus-55 amp repair - 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 20th May 2009, 12:13 PM   #1
diyAudio Member
 
Join Date: Sep 2008
Default roland jazz chorus-55 amp repair

H i have an old Roland jazz chorus-55 to repair and need help with a few things.

1. the reverb pot is missing and don't know what value to replace it with

2. i cant find new output transistors (2sd1408 and 2sb1017) any ideas where i can get them or an equivalent
  Reply With Quote
Old 20th May 2009, 01:30 PM   #2
jaycee is offline jaycee  United Kingdom
diyAudio Member
 
Join Date: Apr 2004
Location: Norwich, UK
IF there are any other pots, check those.. they are probably similar values. I doubt the pot is critical - try a few values. 100K is probably a good start.

For the output transistors, well you could use MJE15034/5 or similar. They are faster so watch out for stability issues, but otherwise they should work well.
  Reply With Quote
Old 20th May 2009, 07:23 PM   #3
diyAudio Member
 
Join Date: Sep 2008
would these work ?

http://www.datasheetcatalog.com/data...5/2SD526.shtml

http://www.datasheetcatalog.com/data.../2SB950A.shtml
  Reply With Quote
Old 21st May 2009, 10:01 AM   #4
diyAudio Member
 
Join Date: Sep 2008
Or thesee
http://www.alldatasheet.com/datashee...EC/2SD526.html
http://www.datasheetcatalog.com/data...5/2SB596.shtml

I can get these in New zealand easily
  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
Fixing non-functional chorus in Roland JC-120 tmh Solid State 2 12th February 2007 07:23 AM
JMLab Chorus 715 JacekPlacek Multi-Way 0 4th September 2006 07:06 AM
M-80 Chorus question mytool4u Instruments and Amps 1 3rd July 2005 07:00 PM
Any Jazz or Jazz'n'Vinyl related forums on the net? Onvinyl Music 2 18th May 2005 11:52 PM
Klipsch RF-3 or Chorus 716 S Netlist Multi-Way 0 6th December 2004 05:22 PM


New To Site? Need Help?

All times are GMT. The time now is 08:58 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