A number of messages have gone back and forth here about roofing
filters. We did mention group delay but I wonder if Elecraft can
provide group delay characteristics for the various filters offered
for the K3.
Seems to me that, in general, fewer poles tend to provide better
group delay in a filter at the expense of the skirts. OTOH, if the
skirts in the roofing filter are sufficient to attenuate a strong,
undesired signal so that it cannot cause desense, then it strikes me
that the 5-pole filters might actually provide superior performance
for digital communications.
73 de Brian, WB6RQN
Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com
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