Hi Jay, I use my older K3 and a newer one on MARS frequencies. The KX3 is used as a MARS ECOM / mobile unit with the KXPA100 amp.
The K3 has a TX donut hole around the 8.2 MHz IF. I think TX is locked out from 7.5 to 9.0 MHz (if memory serves). The KX3 has no such restriction, being a Zero IF transceiver. Elecraft customer support can assist you with the unlock programs needed. You may have to supply your MARS credentials, but I'm not sure how that is handled today. It's been a while since I unlocked my radios here. Except for the K3's IF range, I've found no problems with TX and RX from around 2.8 MHz to 25 MHz. KBPF3 use is recommended though, so that you have enough gain between ham bands. Otherwise, the sensitivity falls off in between bands. Note: There is very little MARS / SHARES activity above 20 MHz. I'm also using the KX3's 2m module to work an above-and-below MARS VHF repeater split, plus the odd set of simplex frequencies NMCM has around 2m. Again, from memory, Elecraft specifies performance inside the ham bands. I don't believe there are any published specs for general coverage. I haven't found any problems with between-band operation - plenty of sensitivity and dynamic range, etc. 73! matt W6NIA / NNN0UET On Mon, 6 Apr 2015 09:37:12 -0700, you wrote: >Can someone furnish the exact "unlocked" or MARS transmit frequency >specifications for the K2, KX3 and K3? > > > >I think some of these radios may have gaps - due to RF filtering, IF, etc. > > > >Also, what about the unlocked transmit specs for VHF in these radios? > > > >Thanks, > > > >Jay > >W6CJ > >______________________________________________________________ >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 >Message delivered to [email protected] Matt Zilmer, W6NIA -- "Always store beer in a dark place." -R. Heinlein ______________________________________________________________ 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 Message delivered to [email protected]
