Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!snorkelwacker!bloom-beacon!eru!luth!d89-bfr
From: d89-bfr@sm.luth.se (d89-bfr)
Newsgroups: sci.electronics
Subject: Help me with these components
Message-ID: <278@sigma1.sm.luth.se>
Date: 20 Nov 89 13:47:52 GMT
Reply-To: <d89-bfr@sigma1.sm.luth.se>
Organization: University of Lulea, Sweden
Lines: 28
UUCP-Path: {uunet,mcvax}!sunic.se!sigma1.sm.luth.se!d89-bfr

I must know how this A/O modulator works electrically. It's not a very tricky
layout, but there are a couple of ???s.

Two IC:s

TRW  CA 2822-3
anzac MD-108

The TRW thing is odd looking. 7 pins. grouped like   ... . ...
On one side there's a LARGE iron (I guess) plate which is connected to ground.

The anzac thing is in a metallic container. Looks a great deal like a relay.

There's also an NPN transistor I don't know the pinning of. It's a
2N3866

And a diode called my2101.

Any info is welcome. By the way, the IC's seems to be little used.
Only pin 1 and 7 on the TRW IC is connected to some signal, where 7 is the
output. The other 5 are connected to ground.
The anzac IC is used a little more. pins 3,4,7,8 are used. The other 4 are
connected to ground.

Thanks.

   _
/Bjorn.