[sdiy] using a CA3080 and a 2SC3622 instead of a LM13700

[anthony]

> Just gonna point out that LM13700's are still made by not less then 2
> companies so you might want to consider saving the 3080's for places where
> you need them specifically and just using 13700's where you need the
> buffer...

Actually the circuit I am using calls for 3080's, but they're using 2N5087's 
& 2N5088's as a buffer like on the CA3094. I like the particular 3080's I am 
going to use. They came from an old Videocipher II - they have painted red 
dots on them which I think maybe means they're matched or just selected. I 
thought about the 2SC3622's since I pulled them from a high-end Sony 
CD-player.

I like the idea of using what I have to hand. I'm always looking at all of 
the parts I'm collected overe the years and think 'surely I can make 
something cool with all of this.' And I do.

I was curious too see if there would be an advantage to using only one 
transistor with a huge gain instead of two in a darlington. The 2SC3622L has 
a gain from 1000 to 2000.