Your opinion on K3s settings for best weak signal cw reception

[dw-4]

Would anyone be willing to offer suggestions/recommendations?
Your setup of the K3s to maximize weak signal cw reception?
I especially would like to figure out how to maximize the APF without ringing.

Sincere thanks
Duane
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[NK7Z]

Use DUAL PB, it will shock you at how clear an almost unreadable CW
signal becomes...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 2/11/20 6:05 PM, [hidden email] wrote:

> Would anyone be willing to offer suggestions/recommendations?
> Your setup of the K3s to maximize weak signal cw reception?
> I especially would like to figure out how to maximize the APF without ringing.
>
> Sincere thanks
> Duane
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html
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>

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[Brian Hunt]

I use an audio spectrum display - Spectrogram - to fine tune a barely there weak signal. Set tuning rate to 1 Hz - the APF peak is less than 10 Hz. Set the frequency cursor in Spectrogram to your pitch frequency. Set the DSP bandwidth wide so the NR works effectively ~ 700 Hz. Use NR mode ~m5-3 so the APF has some unprocessed signal to work on. It takes practice but works.

73,
Brian, K0DTJ

> On Feb 11, 2020, at 18:05, [hidden email] wrote:
>
> Would anyone be willing to offer suggestions/recommendations?
> Your setup of the K3s to maximize weak signal cw reception?
> I especially would like to figure out how to maximize the APF without ringing.
>
> Sincere thanks
> Duane
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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[Petr, OK1RP/M0SIS]

Duane,

important is to set fine tuning (1Hz) when using the APF as the only precise
tune on spot will effectively pulling out this weak sig from the noise. I do
not understand why the K3/K3S never got as same feature as KX3 > switching
to fine tuning automatically when APF is ON...

Also try to reduce RF gain (do not keep it at max) in order to reduce noise.

 



-----
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt
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[IK4EWX]

I have seen that when you need receive very weak signals, signals improve a
lot with AGC THR set at 15 (usually for a more silent reception I use THR
7).
Ian IK4EWX



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