I'm using an LDG DTS-4 to connect 3 rigs (one spare port for test
equipment) to one antenna feed.
73 F5VJC
On 2 January 2017 at 07:19, <glcazz...@alice.it> wrote:
> Sorry, but why not buy a used Bird Coaxwitch with his isolation higher
> than 80 dB?I use them and like them very much.
> Ian IK4EWX
>
> Invio eseguito dallo smartphone BlackBerry 10.
> Messaggio originale
> Da: Richard Fjeld
> Inviato: lunedì 2 gennaio 2017 07:13
> A: elecraft@mailman.qth.net
> Oggetto: Re: [Elecraft] {OT} - Variation on use of a coaxial switch (stan
> levandowski)
>
> Years ago, I built such a switch to prevent accidents should one radio
> transmit when comparing two radios. It is basically an a/b switch such
> that a radio became the active radio by switching the antenna to it, and
> simultaneously switching the dummy load to the inactive radio. Neither
> radio is without a load regardless of the switch position.
>
> My switch is just a prototype using an aluminum project box. I called
> MFJ and suggested they build one. A couple guys got on the call with me,
> and not long afterward, I saw a product advertised that seemed to be
> it. It had decent specs for isolation. I can't find it on their site
> now. The only thing that comes close to it might be the MFJ-1705, but
> they are describing it differently and there is no schematic.
>
> If this isn't the correct switch, It could easily be converted. The
> important hardware is there. I think I used a DPDT switch (I could
> check mine).
> It should have the small coax wired between the connections. I Don't
> remember the nomenclature for that.
>
> Dick, n0ce
>
>
> On 1/1/2017 5:18 PM, Harry Yingst via Elecraft wrote:
> > I've also have thought about running a switch so I can switch between a
> couple of radios here (and a way to idiot proof it).
> >
> > I have considered building up something using relays (or a manual
> switch) that would switch each radio into either a dummy load or into the
> antenna path.
> >
> >
> >
> >
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