[Elecraft] Elecraft] two 2m-Transverters for diversity reception on 2m

[Samir Popaja]

One can use JAVORNIK, transverter with 2 RX...

http://lea.hamradio.si/~s53ww/xvrt/xvrt.htm

http://lea.hamradio.si/~s53rm/JAVORNIK%20144.htm

73' 7S7V


Message: 3
Date: Mon, 13 Sep 2010 09:09:01 -0800
From: "Edward R. Cole" <kl7uw at acsalaska.net>
Subject: [Elecraft]  two 2m-Transverters for diversity reception on 2m
To: Elecraft at mailman.qth.net
Message-ID: <201009131709.o8DH91x2064314 at ingra.acsalaska.net>
Content-Type: text/plain; charset="us-ascii"; format=flowed

John is correct.  Diversity receivers require a common LO.  This is 
provided in the K3 with the aux receiver, but adding VHF transverters 
to both receivers will not add properly if they are running separate
LO's.

I am in the process of setting up a 2m dual-polarity receiver using 
two transverters but run with one LO driving both units.  I 
discovered that DEMI is developing a dual-Rx transverter (two Rx 
antenna ports and IF outputs) that implements this in a single unit - 
I'm on the short-list to get one when available).

Just connecting two separate 2m transverters will not ensure proper 
phase relationship between the two IF outputs so one could end up 
with a situation where the two signals null each other.  This is 
analogous to combining two transmit amplifiers.  If the outputs are 
out of phase energy from one will to into the other with disastrous
effect.

73, Ed - KL7UW

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