Topband: AM interference on 1840

[Tim Childers K9CQ]

Mark, I use a receiving array and have put a high pass filter on the 
receiving array to cut the broadcast band down. I have an AM station near 
here that was doing the same thing.  If you can run a separate RX only 
antenna it helps.  If not then a notch filter for 930 may work that you can 
transmit through.

Tim, K9CQ

-----Original Message----- 
From: Mpridesti via Topband
Sent: Monday, May 20, 2019 11:24 AM
To: Jorge Diez - CX6VM
Cc: TopBand List ; Herbert Schoenbohm ; wsjtgroup at yahoogroups.com
Subject: Re: Topband: AM interference on 1840

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>
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>>
>
> -- 
> 73,
> Jorge
> CX6VM/CW5W
> _________________
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