Topband: AM interference on 1840

[Herbert Schoenbohm]

A notch filter on 930 won't help as the IX is transmitted on 1860.

Herb, KV4FZ

On Mon, May 20, 2019 at 1:26 PM Mark Schoonover <mark at ka6wke.net> wrote:

> Mark,
>
> How about a notch filter centered on 930? Search on AM BCB Filter to get
> some ideas.
>
> 73! Mark KA6WKE
>
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>
> On Mon, May 20, 2019 at 9:24 AM Mpridesti via Topband <
> topband at contesting.com> wrote:
>
>> I have a local AM station here (about 3 km away) that operates on 930
>> kHz. Their second harmonic is 1860.  Seems they are operating within
>> specification and abide by FCC regulations. But still the second harmonic
>> wipes out any DX on or near that frequency. Signal strength is around S7.
>>
>> Regards,
>>
>> Mark, K1RX
>>
>>
>> > On May 20, 2019, at 11:54 AM, Jorge Diez - CX6VM <cx6vm.jorge at gmail.com>
>> wrote:
>> >
>> > I think HK authorities must do something with this.  Local radio Clubs
>> must
>> > act
>> >
>> > https://www.lavozdelpueblo920am.com/programacion
>> >
>> https://www.facebook.com/mauriciovargaslavozdelpueblo/photos/a.1922152811350449/2377754772456915/?type=1&theater
>> > https://twitter.com/mauriciov920
>> > https://raddio.net/134431-colmundo-radio-ibague/
>> >
>> > 73,
>> > Jorge
>> > CX6VM/CW5W
>> >
>> > <
>> https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail
>> >
>> > Libre
>> > de virus. www.avast.com
>> > <
>> https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail
>> >
>> > <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>> >
>> > El lun., 20 may. 2019 a las 12:47, Herbert Schoenbohm (<
>> > herbert.schoenbohm at gmail.com>) escribió:
>> >
>> >> Interference from them makes 1840 useless for me.  Since they don't
>> >> respond to my emails maybe WSJT-X could assign 1844 or 1848 to 160 in
>> their
>> >> next release.
>> >>
>> >> Herb Schoenbohm, KV4FZ
>> >>
>> >> On Mon, May 20, 2019 at 11:21 AM Jorge Diez - CX6VM <
>> cx6vm.jorge at gmail.com>
>> >> wrote:
>> >>
>> >>> Hello
>> >>>
>> >>> do you notice a second harmonic on 1840?  It´s very strong
>> >>>
>> >>> I determined that is from LA VOZ DEL PUEBLO 920 AM, in Colombia
>> >>>
>> >>> https://www.lavozdelpueblo920am.com/
>> >>>
>> >>> I sent them an email with no answer yet.
>> >>>
>> >>> Maybe if they receive many emails will take care about that and ask
>> the
>> >>> technic to solve it, what do you think?
>> >>>
>> >>> --
>> >>> 73,
>> >>> Jorge
>> >>> CX6VM/CW5W
>> >>>
>> >>> <
>> >>>
>> https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail
>> >>>>
>> >>> Libre
>> >>> de virus. www.avast.com
>> >>> <
>> >>>
>> https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail
>> >>>>
>> >>> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>> >>> _________________
>> >>> Searchable Archives: http://www.contesting.com/_topband - Topband
>> >>> Reflector
>> >>>
>> >>
>> >
>> > --
>> > 73,
>> > Jorge
>> > CX6VM/CW5W
>> > _________________
>> > Searchable Archives: http://www.contesting.com/_topband - Topband
>> Reflector
>>
>> _________________
>> Searchable Archives: http://www.contesting.com/_topband - Topband
>> Reflector
>>
>