A subject I am also interested in. The key with the K3 would be having the KRX3 subreceiver and using Rx antenna input for receiving the satellite downlink. The subreceiver IF is easily tapped to provide signal to a radio like the SDR-IQ. BUT the question is if the hardware connections will allow the subreceiver to operate while the K3 transmits. If the hardware path is possible then I am guessing firmware can be done to do this. Using the 15-KHz K3 DSP receiver at the same time as the DSP Tx is probably impossible so I am thinking the key is using another receiver on the subRx IF output.
I will be setting my K3 + DEMI L432-28 for uplink and the KX3 + KX3-2M for downlink (in the interim). Of course both will need to be tuned in freq. to compensate for Doppler shift. I believe both radios are capable of computer control, but not sure there is any sw that can control two separate radios (K3 and KX3 specifically)? Otherwise it becomes an exercise in right-hand/left-hand (and getting the brain to handle that?). The fortunate thing is uplink tuning is rarely needed on FM Leo sats (a shrinking list). For linear transponder satellites like VO-52, SSB requires adjusting both VFO's with a pretty lively Doppler effect. Now try sending CW, as well (how fast can you send with your big toe?). I had both the FT-847 (a superb satellite radio) and the FT-817 (not duplex but a suitable radio) operating satellite in simplex. Both are sold and replaced by the K3 (and soon to be KX3). 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 [email protected] "Kits made by KL7UW" http://www.kl7uw.com/kits.htm ====================================== ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
