roland jazz chorus-55 amp repair

[weesatron]

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

 

[jaycee]

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.

 

[weesatron]

would these work ?

http://www.datasheetcatalog.com/datasheets_pdf/2/S/D/5/2SD526.shtml

http://www.datasheetcatalog.com/datasheets_pdf/2/S/B/9/2SB950A.shtml

 

[weesatron]

Or thesee
http://www.alldatasheet.com/datasheet-pdf/pdf/2572/MOSPEC/2SD526.html
http://www.datasheetcatalog.com/datasheets_pdf/2/S/B/5/2SB596.shtml

I can get these in New zealand easily