K3 Receiver Mute

[Grant Youngman]

Is there a straightforward way to mute the receiver in the K3 from an external "mute" line?  

I want to use the K3 receivers with some vintage transmitters, and am looking for the best way to accomplish RX muting.  Not that an R-390 with a Sherwood sync detector isn't a  good receiver, but summer is coming, and there's enough heat in the shack from other sources  ;)

All I've managed to conjure up is to put the K3 in TEST and then assert PTT from aux contacts on an external antenna relay.  Am I missing something obvious?

Grant/NQ5T
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[Mike WA8BXN]

Assuming your antenna relay provides enough isolation to protect the K3
receiver front end, what about using an external speaker with the K3 and
accomplish muting by switching the audio out from the K3 to an 8 ohm
resistor instead of the speaker during transmit? You could then perhaps
monitor your transmitter on a P3 if you have one.
 
73 - Mike WA8BXN
 
 
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[Don Wilhelm-4]

Grant,

There may be other suggestions, but I believe your proposed setup is
most effective and adheres to the *KISS* principle.

73,
Don W3FPR

On 3/11/2013 9:45 PM, Grant Youngman wrote:

> Is there a straightforward way to mute the receiver in the K3 from an external "mute" line?
>
> I want to use the K3 receivers with some vintage transmitters, and am looking for the best way to accomplish RX muting.  Not that an R-390 with a Sherwood sync detector isn't a  good receiver, but summer is coming, and there's enough heat in the shack from other sources  ;)
>
> All I've managed to conjure up is to put the K3 in TEST and then assert PTT from aux contacts on an external antenna relay.  Am I missing something obvious?
>
> Grant/NQ5T
> ______________________________________________________________
> 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
>

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[Arie Kleingeld PA3A-2]

Grant,

In a two transmitter - single band set-up, I use the ptt-in of the K3 to
mute the RX and, since it is in transmitting mode (key/mic not connected
ofcourse), the rx of the K3 is well protected.

73,
Arie PA3A

Op 12-3-2013 2:45, Grant Youngman schreef:
> Is there a straightforward way to mute the receiver in the K3 from an external "mute" line?
>
> I want to use the K3 receivers with some vintage transmitters, and am looking for the best way to accomplish RX muting.  Not that an R-390 with a Sherwood sync detector isn't a  good receiver, but summer is coming, and there's enough heat in the shack from other sources  ;)
>

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