[Elecraft] Upconverter?

[Edward R. Cole]

Bob,

I have to admit that I have not tested it, yet.

 From the Mini-Circuits spec. sheet the LO drive is +7dBm which is 
easily produced by most OCXO.  Max RF output is +1 dBm with 8-dB 
conversion loss so one will need some gain ahead of it if used in a 
receiving up-converter.  The K3 can generate +1.5mw in TEST mode so 
adding a buffer (2N706 or 2N2222) will suffice for transmitting.

A good two-stage preamp with >30-dB gain should be used for an Rx 
upconverter.  My noise floor runs about -115dBm so that plus 30-dB 
gain offers a signal = -85 -8 = -93 dBm which should be good for most 
receivers (no problem for the K3)..

------------------------------

Message: 21
Date: Sun, 25 Dec 2011 22:35:52 -0500
From: riese-k3djc at juno.com
Subject: Re: [Elecraft] Upconverter?
To: Elecraft at mailman.qth.net
Message-ID: <20111225.223553.3340.0.riese-k3djc at juno.com>
Content-Type: text/plain; charset=us-ascii

they work great, dont they
how much L O drive ?
i understand DBM like a lot of drive
my rcv set up was a bit light for LO but have very good signal handling
ability
and I see no overload CDX using it
bob  k3djc
On Sun, 25 Dec 2011 17:01:53 -0900 "Edward R. Cole" <kl7uw at acsalaska.net>
writes:
 > http://www.kl7uw.com/600m.htm
 > scroll down the page half-way for the item marked March 17, 2011.
 >
 > But mine is a downconverter for xmit.  But no reason it could not be
 >
 > used for receive providing you place a good LF preamp ahead of the
 > mixer (minicircuits SBL-1).  In my case I am using my station 10-MHz
 >
 > reference oscillator as LO and running the K3 in test-mode at
 > 10.470-10.510 MHz with output at 470-510 KHz.  I LP fllter is needed
 >
 > on the output of the mixer circuit.  I am using the downconverter to
 >
 > drive my converted NDB transmitter (100w output for 0 dBm input).
 >
 >
 > 73, Ed - KL7UW, WD2XSH/45



73, Ed - KL7UW, WD2XSH/45
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