[Elecraft] Help on Configuration

[Wayne Burdick]

Deane Walkington wrote:

> The real question is what filter configuration I should consider.   
> The FM
> filter is probably a given.  I am not really interested in AM  
> transmissions
> but do I need the AM filter to listen to the AM broadcast bands?

No; you can listen to AM with the FM filter, and in fact this works  
great with wideband material such as music. The AM filter, being  
nearly half the width of the FM filter, would do a better job of  
rejecting nearby stations.


> I wish to have a good CW capability (CW Skimmer has made me go back  
> to developing
> these skills) but the priority would be the narrow band modes.

At minimum I'd suggest adding a 500-Hz 5-pole or 400-Hz 8-pole filter.  
If you want really outstanding rejection of close-in QRM, I'd also  
recommend our 200-Hz 5-pole filter. This filter is perfect for CW,  
PSK31 or RTTY when the going gets tough, such as during contests.  
Filters are automatically selected as you adjust the WIDTH control.

If you want to optimize for weak-signal work, you should consider  
adding the sub receiver, which is identical in performance to the main  
receiver. It allows you to do full diversity mode, with two receiving  
antennas. In this case you'll probably want to match the sub RX  
crystal filters to those on the RF board.

73,
Wayne
N6KR