[RFI] 160m spur

Wed Jan 11 12:25:21 EST 2023

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 at k3lr.com>
To: "JW" <jwin95 at yahoo.com>, "ezrhino fastmovers.biz" <ezrhino at fastmovers.biz>
Cc: "rfi" <rfi at 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 at yahoo.com] 
Sent: Wednesday, January 11, 2023 3:19 AM
To: 'ezrhino fastmovers.biz'; Tim Duffy
Cc: rfi at 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 at 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 at contesting.com] On Behalf Of ezrhino fastmovers.biz
Sent: Tuesday, January 10, 2023 11:25 PM
Cc: rfi at 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 at 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 at contesting.com> on behalf of Bob Kozlarek WA2SQQ <wa2sqq at gmail.com>
> Sent: Monday, January 9, 2023 16:45
> To: rfi at contesting.com <rfi at 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 at starpower.net>
> To: topband <topband at contesting.com>, rfi <rfi at contesting.com>
> Subject: Re: [RFI] The 160 meter spur
> Message-ID:
>        <1169758511.11327047.1673048186910.JavaMail.zimbra at 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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