[Elecraft] Little filter on the BNC jack?

[Wayne Burdick]

TJ Campie wrote:
> A friend of mine is building his KX3 and noted that his BNC  
> connector had a little filter built on it - mine did not have that -  
> what is this for?
>
Hi TJ,

We decided to add a bit of supplemental low-pass filtering right at  
the BNC jack, with a cutoff of about 60 MHz. This just better isolates  
the KX3 in both TX and RX modes from external VHF/UHF equipment.

The BNC+LPF assembly will be offered as an upgrade for existing KX3s  
at some point. (Not yet -- no phone calls to sales, please....)

Fortunately very few will need it.

73,
Wayne
N6KR