View Single Post
Old 27th Nov 2022, 6:18 pm   #1
samjmann
Heptode
 
samjmann's Avatar
 
Join Date: Feb 2014
Location: Nottingham, UK.
Posts: 645
Default Sony-STR3800L. Output transistors.

The output transistors on this amp have failed on one channel. They are:

2SD531. NPN. 50-60V C-E. 5A Max collector current. (TO-220C)

2SB521. PNP. Similar values to the above.

What would make a good substitute? I can find datasheets on these, but no actual parts.

The drivers have also failed, these are available.

Some have suggested a TIP41/42. The only thing that bothers me is these have a Transistion Frequency of 35Mhz. The 2SD531 is 8Mhz...

I don't want a short lived high power oscillator!

Thanks for any help. SJM.
__________________
It's never been right since we've had it...
samjmann is offline