Successful 2SK214/2SJ77 Substitutes?

[Geek]

Hi Folks,

Got a McCormack DNA-500 that had a "firecracker effect" failure (POP! Bang, bang, bagitty-bang, bang from the output to input). Gonna use NJW3281/1302 on the outs for the C3281/A1302, but coming up dry on the MOSFET's. Don't trust the SOA (often not listed) for the in-production types, AFAIK are only switchmode nowadays.

Thanks for any help!

 

[rcs16]

Those seem to be lateral mosfets in a to-220 package. The Only ones in current production in a to-247 are the exicon devices from profusion.

 

[PE9ZZ]

These unobtanium devices seem to have a habit of violently selfdestructing. You have a manual/schematic for it? If so you could try a similar kludge like my Denon PMA-1560 one. Otherwise you must reverse engineer a schematic.

 

[Geek]

Hi guys,

Figured as much

I have a schematic from them under NDA.

@rcs16 - The TO-247 devices are different animals from what I understand and will not physically fit anyway.

@PE9ZZ - I read your "kludge".... I consider myself a ballsy modder, but on someone else's $6000 amp is a risk I'm not gonna take

Cheers!