Yup, it would be a simple design. For best reliability I think I would probably use a power MOSFET instead of a relay but either would work.
Al N1AL On Wed, 2011-05-04 at 01:17 -0400, Joe Subich, W4TV wrote: > > I'm surprised that RIGrunner or MFJ or somebody doesn't make a 12V > > distribution system with a remote on/off control that could be > > connected to the K3 switched 12V output. > > It's actually a piece of cake. If power for the control relay came > from the external supply and not the the K3 and the relay coil was > controlled by an transistor or FET, one could control the strip with: > > 1) +12V from the K3 > 2) +13.8V from most Yaesu rigs (+13.8V RCA or "Band Data" jack) > 3) +13.8V from the ACC jack on most Icom rigs > 4) +5/+8V from the mic jack of most Icom/Kenwood rigs > 5) +13.8V from most Ten-Tec rigs > 6) +5V from a computer USB port! > > I may even have the design for such a beast around someplace. > > 73, > > ... Joe, W4TV > > > On 5/4/2011 12:54 AM, Alan Bloom wrote: > > I'm surprised that RIGrunner or MFJ or somebody doesn't make a 12V > > distribution system with a remote on/off control that could be connected > > to the K3 switched 12V output. Sounds like an opportunity: Someone on > > the list should market one. Or at least design one and write a QST > > article. > > > > Al N1AL > > > > > > On Tue, 2011-05-03 at 10:01 -0400, Don Wilhelm wrote: > >> The current available from the K3 DC output jack is limited. A PR6 > >> and a P3 just about max it out. > >> For those who want to turn multiple 12 volt powered accessories on and > >> off with the K3, drive the coil of a 12 volt relay from the K3 DC output > >> jack and run the power supply feed through the relay contacts. Lots of > >> devices can then be turned on/off with the K3. That is the most > >> sensible solution IMHO, no worry about overloading the K3 12 volt output. > >> > >> A little enclosure to hold the relay and several RCA jacks or other > >> connector of your choice is an easy project to construct. > >> > >> 73, > >> Don W3FPR > >> > >> On 5/3/2011 9:52 AM, Phil Hystad wrote: > >>> On May 3, 2011, at 5:48 AM, R. Kevin Stover wrote: > >>> > >>>> Define "easy". > >>>> > >>>> Run down to Radios Shack a purchase an RCA 1 to 2 port cable or have > >>>> Elecraft re-engineer/re-design the radio? > >>>> > >>> Actually, given what I have seen out of Wayne and Eric, my bet is on the > >>> re-engineer/re-design of the radio as being easier. > >>> > >>> But, I am not suggesting they do that. As for me, I don't concern my self > >>> too much with how things are plugged in. And, turning stuff on from one > >>> switch is not that big of a thing to me. > >>> ______________________________________________________________ > >>> 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 > >>> > >> ______________________________________________________________ > >> 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 > >> > > > > > > ______________________________________________________________ > > 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 > > > ______________________________________________________________ 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
