I'm having trouble finding 2sd718 and 2sb688 transistors. can any help me with a good replacement for them.
I am by no stretch of the imagination to be considered a professional opinion, however, the FJA4310/4210 are available from Mouser and I would be inclined to try them. They are in a slightly different package and the specs aren't a perfect match. Maybe someone else will have a better solution, but like I said, if it were me, I would give them a shot. I use a lot of 2sc5200/2sa1943 as outputs in my car audio amps and they are still fairly easy to get, but they are probably overkill compared to your original parts.
Good luck,
Jason
Good luck,
Jason
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The FJA4213 and FJA4313 are essentially the same as the FJA parts mentioned above and cover a wider range of amps due to a higher voltage spec. Those are good to stock. They are also the same as the 5200/1943 but in a different package.
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