[Elecraft] Re: KRX3 insatall

[Edward R Cole]

Mike,

I have the KRX3 installed in my K3 with antenna connected to Aux 
antenna jack.  I have not connected another HF antenna while 
operating on HF so do not know if there is danger to the 
sub-receiver.  I thought the KRX3 also had some diodes protecting the 
input from extreme RF levels.

You need two antennas to operated diversity reception.  With both 
receivers sharing a single antenna all you accomplish is being able 
to receive split (which may be nice in some circumstances).

I use my KRX3 to receive a horizontal polarity 2m signals when the 
main receiver is receiving vertical polarity.  Special sw takes both 
signals and is able to strip out the actual polarization angle and 
optimize the signal to that polarization.  It called dual-polarity 
adaptive reception.  One could accomplish the same for HF by using 
two dipoles strung at right angles to each other and adding one 
quarter wavelength of coax to one dipole.  The two dipoles then are 
quadrature phased and one can detect circular polarized signals.  In 
fact nearly all HF is CP after passing thru the ionosphere.

15m thru 6m is easy to set up with such an antenna (due to smaller size).

73, Ed - KL7UW