TNF trick

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  • Updated 4 years ago
While waiting for ANF to be perfected, I have a little trick for the TNF that I sometimes use when rag-chewing with the guys on 40/75 meters.

I will often keep my pan adapter zoomed so that the conversation takes up 1/3 or more of the pan. Then I create a TNF and drag it just outside my RX passband, usually to the opposite sideband.

Then whenever one of the "rude crew" begins tuning up on our frequency, or jamming us, I simply drag the TNF on top of him. It is faster than creating a new one when needed... And unfortunately on those bands it is ALWAYS needed at some point during the QSO! Fast, simple, and doesn't distort the audio like the ANF does.
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Ken - NM9P, Elmer

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Posted 4 years ago

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Terry K8EET

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I've also been doing that, Ken. I find it also cuts down a little noise.
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Steve W6SDM

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In the Flex SDR world, that's what we call carrying one in the chamber.  :)
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Ken - NM9P, Elmer

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Yes. And we can chamber one above and another below and be ready with both barrels...
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Bill -VA3WTB

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Ken, I will try that on the 3000. I have never found a perfect setting for the ANF and it distorts a little all the time. I did find a setting for the NB and it works amazing, kills the noise and NO distortion, but it took some time to find the sweet spot.
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Ken - NM9P, Elmer

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Please share your numbers. I would like to try them on my 1500.
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Bill -VA3WTB

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I will check when I'm home, and post them here.
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Bill -VA3WTB

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Hi Ken. My NR settings
Taps 85
Gain 16
Delay 10
Leak 4

You can change this, but this is were I find good performance.
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Lee

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I find the TNF does distort the audio some (no I don't have it real wide)

But less than the useless (close anyways ) NR

73,

Lee