[Elecraft] APF

[Sam Morgan]

I remember seeing it said that,
using the NR was useless when you were using narrow cw filters

6) NR is rarely useful if the bandwidth is narrow.  If you set your CW width to 
400 Hz or less, for example, there is no point in running NR *unless* you want 
to use it as a sort-of "smart squelch."
http://www.elecraft.com/K3/Lyle%20Johnson%20explains%20Noise%20Reduction.htm

GB & 73
K5OAI
Sam Morgan

On 12/7/2010 2:18 PM, k5nu wrote:
> Fellow Elecrafters,
>
> Many of you have praised the current version of apf.  Since I spend 99%
> or more of my time listening for weak signals on 80m, it should be a
> very useful adjunct.  How do you utilize the apf - with NR on or off?
> My particular preference for listening keeps the NR on - never off.  I
> use 1-3 or 1-4 on cw and find the apf quite uneffective with the NR on.
>
> That said, I have found very few occasions when the NR/NB combo needs
> anything else and am quite happy with the listening experience.
> However, if I could find a method where apf could help even more, I
> would welcome it.
>
> I use diversity rx always, NR on always,  RF gain about 2-3 o'clock on
> both rxs, AF gain at approx. 12 o'clock.  Incidently, I very seldom use
> a filter narrower than 2.4kHz unless in a contest situation.  Just fits
> my ears/brain filter.  Antennas for rx- 4 square/beverage.
>
> Any input would be appreciated as at present I try apf but find it of
> little use at these parameters.  Of course I am not complaining as I
> really enjoy the K3's low band abilities.
>
> 73, Mike K5NU
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