simplest way to protect subrx from high RF on RX antenna?

[Allan Taylor]

Having recently gotten the K3 going with the 2nd receiver, I would
like to try listening and then
TRANSMITTING with the 2nd rx using a separate antenna. Obviously, a
relay to open the rx antenna
feedline or shorting the input would do the job. Where would you
locate these relays? Is controlling them
via the KEY OUT (for the amp) sufficient? Other issues?

I would really like to NOT blow out the front end of the 2nd rx...

--
73     Allan    K7GT
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[Brett Howard]

Here is what you need...

http://www.iceradioproducts.com/reconly.html#rflimiter

On Fri, 2009-07-31 at 13:43 -0700, Allan Taylor wrote:

> Having recently gotten the K3 going with the 2nd receiver, I would
> like to try listening and then
> TRANSMITTING with the 2nd rx using a separate antenna. Obviously, a
> relay to open the rx antenna
> feedline or shorting the input would do the job. Where would you
> locate these relays? Is controlling them
> via the KEY OUT (for the amp) sufficient? Other issues?
>
> I would really like to NOT blow out the front end of the 2nd rx...
>

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[Don Wilhelm-4]

Allan,

The K3 subRX is protected with a C.O.R. when connected to a separate
antenna - so the protection is built in.
OTOH, if you want to silence the clicking of the C.O.R. (it *is* a relay
clicking), then take other means to isolate the RX antenna from the TX
antenna - filters or separation, or opposing polarization (whatever it
takes).  Once you reduce the RF input to the K3 RX ant sufficiently, the
C.O.R. will stop clicking. and the input level will be safe for the K3.
73,
Don W3FPR

Allan Taylor wrote:

> Having recently gotten the K3 going with the 2nd receiver, I would
> like to try listening and then
> TRANSMITTING with the 2nd rx using a separate antenna. Obviously, a
> relay to open the rx antenna
> feedline or shorting the input would do the job. Where would you
> locate these relays? Is controlling them
> via the KEY OUT (for the amp) sufficient? Other issues?
>
> I would really like to NOT blow out the front end of the 2nd rx...
>
>  
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>
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>  

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