[Elecraft] [K3] PTT ??

[Phil Hystad]

Thank you Vernon and thanks to all the others who have answered my questions on and off the reflector.  I have already wired up a temporary switch this afternoon and things work just fine.

73, phil, K7PEH


On Mar 14, 2011, at 8:14 AM, Vernon Mauery wrote:

> On Sun, Mar 13, 2011 at 11:04 PM, Phil Hystad <phystad at mac.com> wrote:
>> Question:  does the PTT IN RCA/Phono connection merely operate a relay or switch in the K3?  That is, by shorting the connection (closing the switch) I am operating a relay switch that stays closed as long as my switch (short) is closed.
> 
> I rigged up a momentary push button switch to short out the
> connection.  That works great for me.  I also have an electronic key
> that I built that uses a transistor to 'close' the circuit.  Either
> way works.  I don't know if internally it is a switch or relay or
> what, but it is awfully quiet to be a relay.
> 
>> Also, I would like to know if it is normal (do other guys do this?) to use multiple PTT switches wired in parallel probably using some parallel connection phono jack thingy.  I have at least two switches (one a foot switch to use with a mic and the other a externally controlled switch for my Signalink USB interface).  Maybe a third switch for a hand held switch for another mic that I might use at times.  No probably not three, but at least two different switches.
> 
> It would certainly be possible to wire up several switches in
> parallel.  If they are mechanical switches, then it won't hurt them at
> all.  If they are electronic switches, you might want to add in some
> circuitry to protect from a short (depending on what kind of output
> stage we are talking about).
> 
> --Vernon N7OH
> 
>> 73, phil, K7PEH
>> 
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