K3S noise blanker: FMOP OTHR

[Richard Lamont]

Hi all,

Has anyone had any success using the K3S noise blanker to get rid of the
new-ish FM-on-pulse types of over-the-horizon radar? I've tried various
settings but nothing seems to make any discernable difference.

There seem to be two main systems, both Russian:

'Sunflower', a surface-wave OTHR, which typically occupies about 40 kHz
of bandwidth on the lower HF bands and puts out 43 pulses/sec and has
been causing a lot of interference on 3.5 and 5 MHz.

'Container', an ionospheric OTHR, which (at present) occupies about 14
kHz of bandwidth, mainly on 14 MHz and puts out 40 pulses/sec and has
spent the last few days centred on 14142, 14228 and 14332 kHz.

73,
Richard G4DYA
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[Don Wilhelm]

Richard,

You may have better luck with Noise Reduction than the Noise Blanker.
The noise blanker works best on impulse type noise.

73,
Don W3FPR

On 3/13/2019 10:00 AM, Richard Lamont wrote:

> Hi all,
>
> Has anyone had any success using the K3S noise blanker to get rid of the
> new-ish FM-on-pulse types of over-the-horizon radar? I've tried various
> settings but nothing seems to make any discernable difference.
>
> There seem to be two main systems, both Russian:
>
> 'Sunflower', a surface-wave OTHR, which typically occupies about 40 kHz
> of bandwidth on the lower HF bands and puts out 43 pulses/sec and has
> been causing a lot of interference on 3.5 and 5 MHz.
>
> 'Container', an ionospheric OTHR, which (at present) occupies about 14
> kHz of bandwidth, mainly on 14 MHz and puts out 40 pulses/sec and has
> spent the last few days centred on 14142, 14228 and 14332 kHz.
>
> 73,
> Richard G4DYA
> ______________________________________________________________
> 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
>

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