Path: utzoo!attcan!uunet!kitty!larry
From: larry@kitty.UUCP (Larry Lippman)
Newsgroups: sci.electronics
Subject: Re: Help me with these components
Summary: Double-balanced mixers & stuff
Message-ID: <3510@kitty.UUCP>
Date: 21 Nov 89 04:41:14 GMT
References: <278@sigma1.sm.luth.se>
Organization: Recognition Research Corp., Clarence, NY
Lines: 28

In article <278@sigma1.sm.luth.se>, d89-bfr@sm.luth.se (d89-bfr) writes:
> I must know how this A/O modulator works electrically. It's not a very tricky
> layout, but there are a couple of ???s.
> anzac MD-108
> The anzac thing is in a metallic container. Looks a great deal like a relay.

	The MD-108 is a double-balanced mixer with an RF & LO frequency range
of 5-500 MHz, and an IF frequency range of 0-500 MHz.  The conversion loss
ranges from 7.0 to 9.0 dB.

> The anzac IC is used a little more. pins 3,4,7,8 are used. The other 4 are
> connected to ground.

	You must have counted the pinx incorrectly; pins 1 and 5 are the LO
port, so both could not be ground.

> TRW  CA 2822-3
> 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 CA28nn series are linear hybrid RF amplifiers.  I don't know
exactly what the CA2822 is, but it is probably similar to the CA2820, which
covers 1-520 MHZ at around 400 mW output.

<> Larry Lippman @ Recognition Research Corp. - Uniquex Corp. - Viatran Corp.
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