Hi, Tony
I had a problem with my hackernap (self inflicted) and I have some MJE4281 in one now and I can't tell any difference.
I got them from Onsemi as samples you have the register amd make some stuff up about what you want them for but for about $20 they will senmd you some.
I have some used MJE3281s you could have for free.
Or if some one is ordering you could tag on to there order.
Pete
I would not just rush into replacing the output trannies without investigating why they failed. Did you short the outputs? If not then there could be a fault elsewhere that might repeat the expensive loss of those trannies!!
Sorry things have gone wrong Tony. Try "Future Electronics", they are usually well priced. Also measure the driver transistors cos they can go too. Good luck!
Hi, Tony
I have 8 uesd MJE3281s you can have.
Add some solder http://uk.farnell.com/multicomp/507-1082/solder-wire-60-40-1-2mm-250g/dp/5071082
I wouldn't mind some my self if you need to add something to make up the minimum order cost.
Pete
I noticed the failure as a result of plugging in my newly built B4 http://www.pinkfishmedia.net/forum/showthread.php?t=118242
No shorts applied, just a power down (the amps are always powered up), swap interconnects then power back up.
Tony