[Elecraft] Dual Receive on same band in K3s

[Bill Frantz]

Consider a weak DX station working split with a big pileup and 
compare the K3(S) and the KX3.

The K3 has a separate receiver for each ear. Each receiver has 
its own set of roofing filters. The KX3 and KX2 have to cover 
the entire frequency range between the DX station and the pileup 
with one roofing filter.

If the DX station is weak, it is easy to have a strong station 
in the pileup calling out of turn cause desense in the KX3 and 
make it hard or impossible to hear the DX. This desense will not 
happen in the K3 because of the separate roofing filters.

Yes, the K3(S) and KX(2,3) are almost equal, but this is one of 
the areas where the K3(S) shows improved performance. In other 
areas of difference. the K3(S) will be more convenient to operate.

73 Bill AE6JV

On 5/11/17 at 3:21 PM, donwilh at embarqmail.com (Don Wilhelm) wrote:

>You are asking about a "Dual Receive" capability, and for the 
>K3 the answer is that the KRX3 is required.  Two identical 
>receivers which have much more capability and flexibility than 
>a 'Dual Receive' function. The subRX and Main can even be on 
>different bands if VFO IND is set on.
>
>The KX3 and KX2 do implement "Dual Receive" - it is a 
>concession for split operation but is limited in range from the 
>main receive frequency, but sufficient for most Split operation 
>situations.  There just is not room inside the KX3/KX2 for a 
>separate receiver.

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