Rick,
The roofing filter option for the KX3 serves an entirely different
function. It reduces the possibility of a strong adjacent channel
signal overloading the KX3 at the product detector stage.
The filters in the KPA500 (and the K3) that attenuate signals below 1600
kHz are in the front end (closer to the antenna) so that strong
broadcast signals below 1600 kHz will not overwhelm the T/R switch PIN
diodes and cause them to be ineffective.
73,
Don W3FPR
On 2/10/2013 6:48 PM, Rick Robinson wrote:
Isn't this basically what the Roofing Filter option in the KX3 does.
Waiting on mine to arrive this Thursday...Rick
On Sun, Feb 10, 2013 at 6:08 PM, Eric Swartz WA6HHQ - Elecraft <
e...@elecraft.com> wrote:
Hi Gary,
This is normal as the KPA500 is designed to attenuate signals the further
you go below the 160M band in order to protect the T/R switching diodes
from BC band overload.
73,
Eric WA6HHQ
elecraft.com
_..._
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