Transistor question

[Nick_the_'Nole]

The numbers after the dashes are probably just production codes of some sort. I really can only guess at what the numbers actually mean, but I'm at least pretty certain that they don't mean anything that matters much for purposes of finding a modern substitute. The 2SC4016 is a quite different transistor from the 2SC401, as is the 2SC4014.

I believe the 2N3710 is quite long obsolete, and there's nothing particularly special about it anyway, so I'd look for something else for the 2SC401. You'll probably want a second opinion before you buy anything, since I'm nowhere near an expert at this sort of thing, but I think a 2SC945 would work fine. Depending on how much power is actually going through the 2SC318, you may be able to use a 2SC945 for that one as well... the 2SC945 is rated at 50mw less, but it looks pretty good otherwise.