Hi Tim,
Unfortunately the chief engineer of the two stations is unavailable
at the moment because of a recent stroke.
WA2SQQ lives only six miles from the two stations and is highly
competent in the technical issues regarding intermod. Bob
lives in kilowatt alley with six 50 KW AM broadcast stations
within just a few miles.
Bob attempted to reach out to the station managers via email,
so far without success. But he will eventually succeed.
73
Frank
W3LPL
----- Original Message -----
From: "Tim Duffy" <k3lr@k3lr.com>
To: "JW" <jwin95@yahoo.com>, "ezrhino fastmovers.biz" <ezrhino@fastmovers.biz>
Cc: "rfi" <rfi@contesting.com>
Sent: Wednesday, January 11, 2023 8:29:54 AM
Subject: Re: [RFI] 160m spur
Not sure why we are talking about filters – that have no impact on the solution
to this problem
Has a local ham (skin in the game) contacted the broadcast station(s) general
manager or the contract chief engineer?
73
K3LR
CT [mailto:jwin95@yahoo.com]
Sent: Wednesday, January 11, 2023 3:19 AM
To: 'ezrhino fastmovers.biz'; Tim Duffy
Cc: rfi@contesting.com
Subject: Re: [RFI] 160m spur
re: " No RX filter can fix this."
I think that is understood; also understand that a 'broadcast' filter (of the
design I forwarded to the group yesterday), or two, ahead of a DF receiver
could allow DFing of the 'spur' in the vicinity of the broadcast transmit
antennas near the transmitter site. I don't know if that idea had occurred to
all persons, or not.
When a single filter can achieve 40 dB attenuation (minimum) in the BCB, TWO
filters in cascade can achieve 80 dB.
de AA5CT Jim
- - - - - - - - - - - - - - -
On Tuesday, January 10, 2023, 10:30:58 PM GMT-6, Tim Duffy <k3lr@k3lr.com>
wrote:
This issue is not a broadcast mix or overload in a ham receiver. No RX filter
can fix this. This is a problem at the broadcast station(s).
Listen to 1940 KHz and hear what is going on.
73
Tim K3LR
-----Original Message-----
From: RFI [mailto:rfi-bounces+k3lr=k3lr.com@contesting.com] On Behalf Of
ezrhino fastmovers.biz
Sent: Tuesday, January 10, 2023 11:25 PM
Cc: rfi@contesting.com
Subject: Re: [RFI] 160m spur
Broadcast band filters for 160m and 80m available here
https://surgestop.com/filter-products/index.html
Chris
KF7P
> On Jan 10, 2023, at 10:22 AM, K2GKK D C_Mac_ Macdonald <k2gkk@hotmail.com>
> wrote:
>
> Isn't this sort of thing usually an occasion of fundamental
> overload of the receiver front end? Attenuation is probably
> the only remedy.
>
> ICE made a high pass filter at one time as a possible aid.
>
> 73 - Mac, K2GKK/5
> (Since 30 Nov 53)
> Oklahoma City, OK
> USAF, Ret'd 61-81
> FAA, Ret'd 94-10
>
> ________________________________
> From: RFI <rfi-bounces+k2gkk=hotmail.com@contesting.com> on behalf of Bob
> Kozlarek WA2SQQ <wa2sqq@gmail.com>
> Sent: Monday, January 9, 2023 16:45
> To: rfi@contesting.com <rfi@contesting.com>
> Subject: [RFI] 160m spur
>
> So that’s where it comes from! That spur is S9, I live about 5 miles from
> those towers. So has anyone contacted the two stations? Is this something
> the FCC could be involved in? FYI I’m two air miles from WABC and luckily
> they don’t give me any problems. My Flex radio is tight as a crabs butt!
>
> Date: Fri, 6 Jan 2023 18:36:26 -0500 (EST)
> From: Frank W3LPL <donovanf@starpower.net>
> To: topband <topband@contesting.com>, rfi <rfi@contesting.com>
> Subject: Re: [RFI] The 160 meter spur
> Message-ID:
> <1169758511.11327047.1673048186910.JavaMail.zimbra@starpower.net>
> Content-Type: text/plain; charset=utf-8
>
> Hi Rick
>
> I've attached a photo of the four 237 foot towers used by 1660 kHz WWRU
> and the four 237 foot towers used by the 1380 kHz WKDM.
>
> The two directive antenna arrays share the same site at
> 350 Paterson Plank Rd, East Rutherford NJ
> <https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.google.com%2Fmaps%2Fsearch%2F350%2BPaterson%2BPlank%2BRd%2C%2BEast%2BRutherford%2BNJ%3Fentry%3Dgmail%26source%3Dg
>
> <https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.google.com%2Fmaps%2Fsearch%2F350%2BPaterson%2BPlank%2BRd%2C%2BEast%2BRutherford%2BNJ%3Fentry%3Dgmail%26source%3Dg&data=05%7C01%7C%7C769f49c7410b453fa3be08daf2934f1a%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638089011749005354%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Uz3ffnKeQkmjW8FvW1f%2BGK0%2FXUAUNAbeNaL%2F3EZwkWg%3D&reserved=0>
>
> &data=05%7C01%7C%7C769f49c7410b453fa3be08daf2934f1a%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638089011749005354%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Uz3ffnKeQkmjW8FvW1f%2BGK0%2FXUAUNAbeNaL%2F3EZwkWg%3D&reserved=0>
>
> The 1940 kHz intruder is the third order intermod of 1380 and 1660 kHz
> --
>
>
>
> *Best 73 de WA2SQQElmwood Park, NJ"The only dumb questions are those we
> don't ask"*
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