[sdiy] More Russian parts, LEL' UDS

[Jaroslaw Ziembicki]

----- Original Message ----- 
From: "Metrophage" <c0r3dump23 at yahoo.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, September 15, 2004 9:29 PM
Subject: [sdiy] More Russian parts, LEL' UDS


> The only most boggling thing currently is my lack of knowledge about
> the Soviet / Russian semiconductors which are used. Info I have found
> on the web has been very sparse. Most of the Russ CMOS chips are
> supposedly compatable with similar western 4XXX  ICs. As for
> transistors...?

I just had a look at the schematic. No problem to find replacement types:
Diodes = 1N4148, NPNs = BC547 or similar, FETs = BF245 or similar,
op-amps = uA741, LM324, LM348, ...
D1 = D4 = CD4011, D2 = CD4006.
D3, D6 and D7 must be NPN differential pairs; each can be replaced
by 2/5 of CA3046 (and discrete transistors can be replaced by
remaining 3/5).
Voltage regulators on the right (+9V and -9V) I would replace by LM317
and LM337.
Some other improvements also could be made. For example: 25 diodes
can be thrown away...

Regards
Jarek