Hi All, 

After searching the internet high and low for an answer, i have to suffice and start a fresh thread.

I've purchased a basket case amp for repair to find it contains blown output transistors, 2SA1216 + 2SC2922, along with a few other surrounding parts etc.

These are not available anymore, so fingers crossed there is a good substitute available.

After doing abit of research, it looks like that the 2SA1943 + 2SC5200 would be a close match (and available through RS Components),  but i just wanted to double check, and hopefully learn a thing or two.

Looking at RS at A1943s, there are Toshiba parts and ON Semi parts, the Toshibas have a Ic of 15A, and the ON Semi have a Ic of 17A,  does that difference lean a preference to one part or the other?

Looking at the absolute maximum ratings, they both look similar to me.  my only concern would be the Power dissipation.

my understanding of this stuff starts to fade when we get into the nitty gritty.

Is there anything there that stands out that is cause for concern,   to me, the large diffrence in Icbo stands out.

I know for a fact that the toshibas a suitable for audio purposes, because that is what was in a C320bee that i repaired a while back.

Greatly appreciate your input,

Thanks,

Jack