[Elecraft] Roofing Filters - An Empirical Test

[Vic Rosenthal K2VCO]

Actually, I switched to this method too, mainly because of QRQ mode. And 
I got a 400 Hz filter for the main rx.

On 5/15/2014 8:27 AM, Rick Tavan N6XI wrote:
> You can mitigate that problem somewhat by listening to the DX on the
> wide sub and the pileup with the narrow main rx. If the split is
> (roughly) larger than the filter bandwidth difference, then loud,
> continuous callers in the pile don't bother the DX signal, only your
> ability to locate the weak caller in the strong pile. That being said, I
> put a narrow filter in both receivers.
>
> The unconventional technique of listening to the DX on the sub and the
> pileup on the main has another benefit - you don't have to use SPLIT
> mode which degrades keying at high speed and disables QRQ mode. It took
> me a while to get used to it after decades of doing it the other way,
> but I think the benefits outweigh the change in my cage.
>
> 73,
>
> /Rick N6XI
>
>
> On Mon, May 12, 2014 at 2:49 PM, Vic Rosenthal K2VCO
> <k2vco.vic at gmail.com <mailto:k2vco.vic at gmail.com>> wrote:
>
>     My K3 was originally set up this way, 400 Hz in the main and 2.8 kHz
>     in the sub.
>
>     When working DX pileups with the main on the DX and the sub on the
>     pileup, I definitely noticed the 'pumping' effect on the sub only.
>     It was sometimes annoying when the DX was working a weak caller and
>     the usual loud idiots were continuing to call.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/