Well, these certainly are compelling solutions, even though they are designed for separate transmitter and receiver, rather than separate transmit & receive antennas. I suppose one could just "use it backwards" so to speak, and it would work. More money than I'd hoped to pay, but not out of the question. Not a bad suggestion really, and I'm not sure how I missed these when I was searching.
Thing that I find myself wondering now is what would happen when the receive coax gets shorted to ground, as both these units do when in transmit mode...probably nothing, but that's a question for the antenna manufacturer. Thanks, 73 & Aloha, Dave, AH6TD On Apr 22, 2012, at 10:11 AM, [email protected] wrote: > I used, until recently, a ELAD transmit/receiver switch to protect the front > end of my auxiliary receiver. I know that MFJ makes at one model as well > (MFJ-1708), perhaps two. The ELAD switch isn't normally available in the US, > but is frequently available used and can be ordered from Europe. > > 73, > > Mike Alexander - N8MSA > > [email protected] > > From: "David Herring" <[email protected]> > To: [email protected] > Sent: Sunday, April 22, 2012 4:03:14 PM > Subject: [Elecraft] OT: Advice re: blocking RF from rx-only antenna > > Hi Everyone, > > Yes, this is off-topic a bit, but I know there are some of you here who will > be able to get me going in the right direction. > > I have a PixelSatRadio RF Pro 1A receive-only moebius loop antenna. It is > being used with a Kenwood TS-440S that does not have the provisions for a > receive antenna like the K3 does. In order to make sure one doesn't fry the > antenna's pre-amp, I need a fool-proof way to ensure that no one ever > accidentally sends RF down the coax to that antenna. > > I have thought about maybe some kind of a PTT enabled antenna switch. > > I have thought about some kind black box with a circuit one could build that > would act as a gatekeeper to allow RF in from the antenna but block any going > out. > > I have searched the 'net and have not yet found anything along those lines > that I could implement. > > So my question to you is, can anyone here recommend such a switch or such a > black box circuit? Or maybe propose something else that I'm not even > thinking of? Any ideas, suggestions, recommendations? > > > > I need this to be on-the-cheap and I'm not opposed to homebrewing something > here, though I only have modest-at-best skills in homebrewing. > > > Many many thanks, > > Dave, AH6TD > > > I now return this reflector to normal programming, already in progress. ;-) > ______________________________________________________________ > 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 ______________________________________________________________ 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
