At one time there was a paper on the web page written by either Wayne or
Eric ( I can't remember which) that had recommendations on filter
selection. You might try and find it or get the author to republish.
73,
Barry
K3NDM
------ Original Message ------
From: "Jim Brown" <[email protected]>
To: [email protected]
Sent: 9/1/2016 2:47:40 PM
Subject: Re: [Elecraft] Recommended filters for Diversity Receive?
On Thu,9/1/2016 10:19 AM, [email protected] wrote:
My primary usage will be SSB and CW contesting, and very occasional
SSB and CW DXing.
My ears find a 1.8 kHz roofing filter too narrow for SSB, preferring
2.1 kHz. The DSP IF can always be set narrower if desired.
I first bought 400 Hz 8-pole CW filters and later 250 Hz 8-pole. I
nearly always use the 250 Hz filter on CW. I only use the 400 Hz filter
for RTTY.
Diversity is VERY useful on 160, 80, 40, and even 30M. I find that I
nearly always use diversity to pull out seak signals, so I have only
put the narrowest filters in the second RX.
Diversity is useful in several ways. First, to overcome selective
fading -- that simply requires antennas spatially separated from each
other. Second, for multiple directivities, both vertical and
horizontally. My second RX is usually connected to a Beverage.
73, Jim K9YC
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