[Elecraft] Sub-Rx Filters

[Edward R Cole]

Lane,

For my needs I only installed just the 2.8-KHz filter in my KRX3 in 
FL2 position to match the 2.8-KHz filter in the main-Rx.  Since 
bandwidth is set by the DSP and I do very little HF CW, so this is 
sufficient for my use of diversity mode.

I have the 13-KHz in FL1 (for FM/AM), 2.8-KHz in FL2 (for CW/SSB), 
and 400-Hz in FL4 (for CW) installed in the main-Rx.

I left FL3 position open in both Rx because I chose that when running 
diversity reception on digital modes (DATA A, USB) where signals are 
output on the 1st IF connectors and bypasses the roofing filters (and 
2nd-IF/DSP).  I found that having FL2 selected when I run everything 
thru my LP-Pan caused a signal "suck-out" near zero frequency, and 
was cured by selecting an open filter position.  MAP65 uses the 
LP-Pan, whereas WSJT10/JT65 uses the normal LINE-OUT from the DSP 
section.  I would not worry about any of this for your application.

73, Ed - KL7UW
http://www.kl7uw.com
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