The KX3 has a single BNC antenna connector output for HF. The KX3-2m transverter is to have a separate sma antenna connector. In both cases it appears that one will need an interface between the KX3 and a transverter.
IN the case of a transverter (like the KX3) using a 28-MHz IF, I suggest the easy way would be to incorporate the Downeast Microwave model AOS-28 http://www.downeastmicrowave.com/cat-frame.htm found under accessories. This unit uses either RF sensing or a TR control line from the 28-MHz IF radio to control transmit/receive switching. The unit will take up to 25w input and reduce that to as low as 10mw or as high as 1w for driving the transverter thru a separate Tx coax line. The unit has a separate Rx coax line for connection to the transverter. Signal loss from transverter to 28-MHz IF is less than 1-dB in receive. Its operation is functionally the same as the KXV3 for interfacing transverters and will work with any HF SSB radio with 25w or less output. One could HB this but you probably would not save much over the AOS-28. There is an identical unit (AOS-144) for interfacing 2m IF radios to transverters that use 2m input. These two units are fully assembled and not offered as kits by DEMI. You should specify the transmit drive level you want for your transverter when you order as it will be setup at that level for you. I know nothing about Tx delay availability on the KX3. One should not need any antenna tuner for interfacing a transverter. I assume the KXAT3 has a bypass mode. Until the KX3-2m is available I have an older DEMI 144-28 transverter I recently modified to work with the KX3, when it arrives. It has the circuitry that the AOS-28 supplies so one can just connect the KX3 to the transverter. This transverter is no longer made by DEMI. PS: I have no financial connection with DEMI. 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 "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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
