K3 Feeding Other Radios

[Patrick DalPorto-2]

I am interested in listening to my K2 and K3 at the same time using the same antenna.  I thought there was a post about how to accomplish this but I cannot seem to locate it.  Can anyone point me to the post? or tell me how to do this.

Pat , W8FV  
K2 - 257, K3 - 1286
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[Bill W4ZV]

Patrick DalPorto-2 wrote

I am interested in listening to my K2 and K3 at the same time using the same antenna.  I thought there was a post about how to accomplish this but I cannot seem to locate it.  Can anyone point me to the post? or tell me how to do this.

You need a Magic-T splitter for RX ANT ports only (do not use this on an RF transmit port or you may damage your rigs).  Here are a few links:

http://www.qrp.pops.net/swl-ant-split.asp
http://www.w8ji.com/combiner_and_splitters.htm

Commercial versions are also available from Mini-Circuits and possibly others.  There is of course a 3 dB loss to both receivers due to splitting the signal in half.

73,  Bill

[Dave Van Wallaghen]

Hi Pat,
It was me who asked the question, but I can't find the post anywhere.

If you have the KXV3 installed, you can bring your main antenna into the
K3 and then connect the RX Out of the KXV3 to your K2. Better yet, if
you have the KX160 module in your K2, you can use the receive antenna
input (so you don't accidentally key up your K2 into the RX Out port of
the K3).

Off the top of my head, I can't remember if there is anything else you
need to do in the K3 setup to get this to work or not. Maybe someone
else can chime in.

It worked well for me and really is a tribute to the fine receiver in
the K2. For the simple tests I ran, it heard about as well as my K3. But
we can enhance that signal so much easier with the K3 ;-)

Good luck & 73,
Dave W8FGU

Patrick DalPorto wrote:

> I am interested in listening to my K2 and K3 at the same time using the same antenna.  I thought there was a post about how to accomplish this but I cannot seem to locate it.  Can anyone point me to the post? or tell me how to do this.
>
> Pat , W8FV  
> K2 - 257, K3 - 1286
> _______________________________________________
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> You must be a subscriber to post to the list.
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>
> Help: http://mailman.qth.net/subscribers.htm
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>
>
>  

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[Vic K2VCO]

Patrick DalPorto wrote:
> I am interested in listening to my K2 and K3 at the same time using
> the same antenna.  I thought there was a post about how to accomplish
> this but I cannot seem to locate it.  Can anyone point me to the
> post? or tell me how to do this.

If you have the KXV3 with the RX ANT OUT connection, you can feed the K2
from this. It would be best if you have the 160 M / RX Ant option on the
K2, because then you can use the RX ant input on the K2. You definitely
do NOT want to transmit into the K3's RX ant output!
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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[Dave, G4AON]

I run either a K2, or more recently a Perseus, off the back of my K3.
With the K2, you do need the 160m option to avoid transmitting into the
K3 as per Vic's post. You can mute the K2 by setting the power to zero,
TX Test mode, side tone to zero, TX delay quite long, connect the K3 KEY
OUT to the Morse key in of the K2. Put the K2 on a small dummy load too,
just to be safe.

Using a hybrid coupler, or whatever they are called elsewhere, link the
two together. A couple of FT50-43 cores and a some enamelled copper wire
in a small project box with 3 BNC sockets will make you one in an hour
or so, no need to buy one. The diagram of the one I use is posted at:
http://www.astromag.co.uk/k3/

73 Dave, G4AON

Patrick DalPorto wrote:
 >/ I am interested in listening to my K2 and K3 at the same time using
/>/ the same antenna. I thought there was a post about how to accomplish
/>/ this but I cannot seem to locate it. Can anyone point me to the
/>/ post? or tell me how to do this.
/
If you have the KXV3 with the RX ANT OUT connection, you can feed the K2
from this. It would be best if you have the 160 M / RX Ant option on the
K2, because then you can use the RX ant input on the K2. You definitely
do NOT want to transmit into the K3's RX ant output!
--
73,
Vic, K2VCO
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