I have one of the Array Solutions units protecting my K3. FWIW, I have a KPA500 and a number of antennas on a two acre lot. Translates to lots of cross-coupling.
73 Ken - K0PP On Jan 27, 2015 7:11 PM, "[email protected]" <[email protected]> wrote: > I've been using the Array Solutions device (AS-RXFEP) for over a year on > my K3. I have a homebrew magnetic loop connected to the K3 sub rx, with > the loop located about 15 feet from the transmitting ground plane (about > 6' above ground). Prior to installing the AS-RXFEP, the sub rx COR would > be triggered with anything over about 25 watts. With the AS-RXFEP in > place, I can run the KPA-500 at 600W without the COR ever tripping. > > The S-RXFEP has no relays, requires no supply voltage, and is simply > installed in between the rx antenna and the sub rx antenna input via a > pair of SO-239 connectors. > > 73, Dale > WA8SRA > > > > > > There are a couple of things to think about. How much power are you > > running? > > How close is the receive antenna to your transmitting antenna? Does your > > receive only antenna possibly have an interface that can connect to the > > key > > out of the K3? (My Pixel Loop antenna has such a device) > > > > You can also try it out and listen for a clicking noise from the carrier > > operated relay inside the K3. It is a protective relay that will energize > > if > > it sees too much power coming in on the RX antenna input. If you hear it > > clicking then it is a good idea to consider additional protection. > > > > There are external protective devices available that you can purchase. DX > > Engineering and Array Solutions have them I think there are others out > > there. > > > > > http://www.dxengineering.com/search/department/antennas/section/receive-antennas-and-arrays/product-line/dx-engineering-receiver-guard-5000-electronic-rf-limiters?autoview=SKU&N=4294953330%2B4294951218&sortby=Default&sortorder=Ascending > > > > http://www.arraysolutions.com/Products/as_rxfep.htm > > > > 73, > > Mike K2MK > > > > > > Elecraft mailing list wrote > >> I ordered the sub receiver and in the conversation with Elecraft I was > >> informed that it is good idea to build a device that would short the > >> dedicated RX antenna to ground to protect it during transmit. > >> The simple way would be a relay but I'd rather not hear a relay click > >> with > >> each transmission. > >> I was wondering what others are using to accomplish this. > >> > >> Thank you > > > > > > ______________________________________________________________ > 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] > ______________________________________________________________ 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]
