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:
[hidden email]
Subject: Re: [Elecraft] Upconverter?
To:
[hidden email]
Message-ID: <
[hidden email]>
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" <
[hidden email]>
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
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
DUBUS Magazine USA Rep
[hidden email]
======================================
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