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K3S receive antenna

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Leroy

K3S receive antenna

Can the K3S with antenna tuner installed receive on one antenna and transmit on another?

Thanks Leroy
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Cady, Fred-2

Re: K3S receive antenna

The main receiver can listen on the transmit antenna selected by the ATU or the separate receiver antenna input.
The sub-receiver can listen on the same antenna as the main receiver or the other antenna on the ATU or the separate AUX antenna input (requires a connection change in the K3S).
Cheers,
Fred KE7X

For all KE7X Elecraft books, see www.ke7x.com
(PS: A KX2 book is coming)

________________________________________
From: Elecraft <[hidden email]> on behalf of lmarion <[hidden email]>
Sent: Saturday, May 21, 2016 3:17 PM
To: [hidden email]
Subject: [Elecraft] K3S receive antenna

Can the K3S with antenna tuner installed receive on one antenna and transmit on another?

Thanks Leroy
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Nr4c

Re: K3S receive antenna

In reply to this post by Leroy

Yes. You have a BNC antenna jack labeled REC ANT I believe. Use it for REC antenna. It is disabled while transmitting and is not in the TX path so you can't hurt anything. It is located on rear of radio and is most left of the bank of 5 below the audio jacks.

Sent from my iPhone
...nr4c. bill

> On May 21, 2016, at 5:17 PM, lmarion <[hidden email]> wrote:
>
> Can the K3S with antenna tuner installed receive on one antenna and transmit on another?
>
> Thanks Leroy
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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Guy Olinger K2AV

Re: K3S receive antenna

In reply to this post by Cady, Fred-2

If one is not contemplating 2 meters, there is a way to listen on both
ANT1 and ANT2.

The antenna tuner has a miniature TMP jack for the "other" ant. If you have
selected ANT1 with the ANT button then the ANT2 SO239 is connected to the
"other" jack. If you have selected ANT2 with the ANT button then the ANT1
SO239 is connected to the "other" jack. The "other" jack is RF protected
with circuitry on the antenna tuner board. The problem with using it with
no further work, is that you have to "trade" another input path for it. But
there is a mechanically simple way to work around that without using any
soldering irons or cutting anything.

On my K3 I installed the fan panel for the 2 meter option, which has the
ANT3 marked hole for a BNC. Then I installed a cable, TMP male on one end
with BNC chassis female on the other. I ran the cable from the antenna
tuner's "other" jack to the ANT3 marked hole. This brings the "other" jack
on the antenna tuner out to the back plane on a BNC jack. The plate with
the ANT3 BNC mounting hole and TMP male to female BNC chassis core are both
available as parts from Elecraft.

Once you've done that, you can use a BNC jumper to (A) go from ANT3 BNC
jack to either RX ANT IN BNC jack for use by the main RX or (B) the AUX RF
BNC jack for use by the subRX. With the (A) connection, a tap on the RX ANT
button switches the main RX between the main TX ant and whatever is on the
"other" antenna. With the (B) connection a long tap on the RX ANT button
switches the subRX between the main TX ant and whatever is on the "other"
antenna. Using in one connection does not prevent you from simply changing
it as the need arises.

I have used that arrangement to listen in diversity to both sides of a 90
degree X oriented pair of dipoles connected to ANT1 and ANT2. It works for
other antennas as well. In that arrangement, the left ear is always on the
transmitting antenna. If you hear it better on the right ear, you have to
tap the ANT button to move it to the left ear, and then you will be
transmitting on the antenna you heard the station best.

For 160m fixed RX antennas and diversity, a 6x2 RX antenna switch will
allow any combination of antennas in diversity RX with the "other"/ANT3
mod. Cable the AUX RF and RX ANT IN to the x2 jacks on the switch. Cable
RX ANT OUT and ANT3 to two of the 6x side of the switch. Cable other RX
antennas to remaining jacks on the 6x side of the switch.

Once the "other" to ANT3 connection is made, all the above can be done,
other arrangements invented, swapped in and out without any further mod to
the K3/K3S.

If it were me, I would supply the K3S already wired that way. Then to add
the KXV144 just move the TMP end of the cable from the tuner to the xverter.

73, Guy K2AV

On Sat, May 21, 2016 at 6:31 PM, Cady, Fred <[hidden email]> wrote:

> The main receiver can listen on the transmit antenna selected by the ATU
> or the separate receiver antenna input.
> The sub-receiver can listen on the same antenna as the main receiver or
> the other antenna on the ATU or the separate AUX antenna input (requires a
> connection change in the K3S).
> Cheers,
> Fred KE7X
>
> For all KE7X Elecraft books, see www.ke7x.com
> (PS: A KX2 book is coming)
>
> ________________________________________
> From: Elecraft <[hidden email]> on behalf of lmarion <
> [hidden email]>
> Sent: Saturday, May 21, 2016 3:17 PM
> To: [hidden email]
> Subject: [Elecraft] K3S receive antenna
>
> Can the K3S with antenna tuner installed receive on one antenna and
> transmit on another?
>
> Thanks Leroy
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>
> ______________________________________________________________
> Elecraft mailing list
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>
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>

Don Wilhelm

Re: K3S receive antenna

In reply to this post by Leroy

Leroy,

The answer is "yes", but how to do it depends on your K3S physical
configuration.

If you only have the main receiver (no subRX), you can transmit on ANT1
or ANT2, and connect a receive only antenna to the ANT IN BNC connector
in the rear (set of 5 BNC jacks).
Select RX ANT.

If you have the SubRX installed, things get a bit more complicated, and
it depends partly on how you have the subRX AUX input connected and
whether the subRX is set to share the antenna with the main or whether
it is set to use its AUX input.

If the subRX AUX input TMP cable is connected to the TMP jack on the
KAT3, then the AUX input for the subRX will be from the non-transmit
antenna - in other words, if the main is set to transmit on ANT1, the
SubRX will listen to ANT2 (assuming the subRX is set to use its AUX input).
OTOH, if the AUX input for the SubRX is connected to the BNC AUX input,
then a receive antenna can be connected to the BNC AUX jack and the
subRX will listen to that RX antenna when the subRX is set to use its
AUX input.

73,
Don W3FPR

On 5/21/2016 5:17 PM, lmarion wrote:
> Can the K3S with antenna tuner installed receive on one antenna and transmit on another?
>
>

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