[sdiy] More Russian parts, LEL' UDS

[john mahoney]

----- Original Message ----- 

> Voltage regulators on the right (+9V and -9V) I would replace by
LM317
> and LM337.

Why not use a 7809 and 7909?

It seems like these 9V regulators were released long after the 7805,
7812, etc., because I've seen it written* that there are no 9V
regulators. But, they do indeed exist.

Just wondering.
--
john

* For example, it says that in Anderton's EPFM. I know this book has a
lot of shortcomings and is now quite outdated, but this "classic" was
my first non-Mimms electronics book and really got me interested in
musical DIY. :-)