[Elecraft] KRX3 independance RX Main Ant1 Sub Ant2 possible?

[Don Wilhelm]

Frank,

The AUX ANT input to the sub has a COR (carrier operated relay) included 
as a protective device. See the antenna routing configuration possible 
in the manual starting at page 41. 
If you hear a relay clicking as you transmit, you may want to check the 
amount of RF that is coming from your receive antenna.  The K3 T/R 
switching is all electronic, no relays should operate.

73,
Don W3FPR

Frank DL2GRF wrote:
> Don,
> thank you for explanation! If I have selected on 20m main receiver to ANT1
> (Beam) and switch the sub-receiver on 80m I have the chance to switch
> between AUX and ANT1. But not to ANT2 (80m Dipol). That´s not possible?
> Another question: At AUX connector I have an active antenna dx-one from RF
> systems. Transmitting during on air period is allowed from manufacturer. It
> would be not destroyed. But strong receive level coming through the aux
> input of K3. I think it is protected against own transmission. But if I
> transmit with an other transceiver he get the full rx level to sub receiver
> and could damage. What do you think?
> 73 Frank
>
> Don Wilhelm-4 wrote:
>   
>> Frank,
>>
>> If the frequency on the main receiver is lower than that of the sub, you 
>> may be greeted by a message that says USE AUX.
>>
>> There is a Low Pass Filter associated with the main receiver (and 
>> transmit signal).  If that low pass filter is also placed between the 
>> sub-rx and the antenna, higher frequencies will be severely attenuated - 
>> thus the message USE AUX.  The Auxiliary antenna input to the sub does 
>> not have a low pass filter in the path.
>>
>> 73,
>> Don W3FPR
>>
>> Frank DL2GRF wrote:
>>     
>>> Hi,
>>> using FW 3.03. KRX3 installed. Cable routed to Aux-Connecter not to KAT3.
>>> Is
>>> it possible to receive with main receiver on 80m at ANT2 e.g. and with
>>> sub
>>> receiver on 20m at ANT1. If I switch sub-receiver outside the band of
>>> main,
>>> it switches to aux connector. 
>>> If I route the cable to KAT3 is it till then possible to use different
>>> antennas?
>>> 73 Frank DL2GRF
>>>   
>>>   
>>>       
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>
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