[Elecraft] RX Ant Out?

[Randy Farmer]

When the RX ANT function is engaged, the normal internal connection 
between the Receiver side of the K3's T/R switch and the Receiver input 
is broken. The output from the T/R switch is routed to the RX Ant Out 
jack. The RX Ant In jack connects to the Receiver input. This allows you 
to insert a preamp, filter, etc. in the receive line between the antenna 
and the Receiver input. This function is extremely useful. In addition 
to allowing the insertion of filters, etc. you can also feed the 
Receiver input from an external switching unit to select one of several 
different receive antennas without disturbing the transmit path. One of 
the inputs can of course be the transmit antenna signal from the RX Ant 
Out jack. I use this function extensively to switch between different 
receive antennas, especially for low band reception. I have actually 
built a switch matrix that allows me to put any of three receive antenna 
sources to either the Main receiver input via the RX Ant In jack or the 
Sub receiver input via the AUX RF connector, with suitable lockout 
logic. This setup is extremely valuable for Diversity reception.

73...
Randy, W8FN

On 7/12/2016 9:02 PM, Jim Miller wrote:
> I can't figure out what RX Ant Out does. The K3s users manual is pretty
> sparse in it's description.
>
> It appears that the "normal" e.g. Ant1/2 is presented to RX Ant Out when
> the RX antenna is selected.
>
> If that is the case then could RX Ant Out be fed to Aux In?
>
> That would make the TX Ant the Aux antenna and would allow for diversity
> using this on the Sub RX while RX Ant is going to the Main RX.
>
> Am I missing something? (probably...)
>
> jim ab3cv
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