Output Transistors for B210/B21000 in Calrec PQ1161

[plumsolly]

I have a Calrec PQ1161 on the bench with a bad output stage. The output stage is based around a B210 amp card. (The silkscreen actually reads b21000-AB but I believe they are the same/similar?). I suspect the output transistor pair on the card. They were originally bfr41/81 (at least for the B210), but had been replaced on my card at some point with NTE293/294. The bfr41/81s are no longer available. Does anyone have any insight on modern replacements or any insight as to whether those were the originals on this card.

Thanks,

Ben

 

[moamps]

You can try BC639/640 pair.

 

[plumsolly]

Thanks Moamps,

I might give those a shot.

Any other ideas?