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-k3...@juno.com Subject: Re: [Elecraft] Upconverter? To: Elecraft@mailman.qth.net Message-ID: <20111225.223553.3340.0.riese-k3...@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" <kl...@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 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-? DUBUS Magazine USA Rep dubus...@gmail.com ====================================== ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
