[RFI] Two meter interference

Hare,Ed, W1RFI w1rfi at arrl.org
Wed Jun 11 18:10:24 EDT 2003

ARRL's info on cable TVI may help:


This is a 3-part article that was first published in Communications Technology, the journal of the Society of Cable Telecommunications Engineers. Your cable operator will feel comfortable with the content.

If things don't go smoothly, contact Mike Gruber, W1MG at arrl.org, with a short summary of your case and efforts to resolve it. Mike can forward a cable case to Ron Hranac, N0IVN. Ron serves on the SCTE Board of Directors and can be very helpful at helping local cable operators understand their responsibilities.

Ed Hare, W1RFI
225 Main St
Newington, CT 06111
Tel: 860-594-0318
Internet: w1rfi at arrl.org
Web: http://www.arrl.org/tis

ARRL is the National Association for Amateur Radio.  It is supported by membership dues, individual contributions and the sale of  publications and advertising. For more information about ARRL, go to http://www.arrl.org/news/features/inside-your-league.html. For more information about membership, go to http://www.arrl.org/join.html.  Your contribution can also help support ARRL's ongoing efforts to protect Amateur spectrum. Go to https://www.arrl.org/forms/development/donations/basic/ to learn more about the ways you can support the ARRL programs and activities of most importance to you. You can help ARRL protect Amateur Radio for you and future generations to enjoy.

> -----Original Message-----
> From: Jerry [mailto:k0hzi at attbi.com]
> Sent: Sunday, May 11, 2003 1:58 PM
> To: ka5s at earthlink.net
> Cc: rfi at contesting.com
> Subject: Re: [RFI] Two meter interference
> Yes, Leon W5NA sent me that info.  I tune the TH-F6  and 
> Azden to 149.76 
> and hear music that matches channel 18 on my Television, they play 
> classical music when there are no high school sports or city council 
> meetings broadcast on channel 18.
> Will contact Comcast and see if they can send someone out to
> troubleshoot the problem.
> 73, Jerry  K0HZI
> Cortland Richmond wrote:
> > There are a number of possibilities. One is video carrier 
> leakage from
> > Cable TV channel E -- and if you don't get it on your own 
> Cable it may be
> > an illegal hookup by another tenant. Another is a scanner's local
> > oscillator (some of the old ones are _strong_).  In the 
> latter case, a
> > Regency scanner using a 10.8 MHz IF might use a 145.26 MHz 
> LO for the
> > Minnesota Department of Transportation at 156.06, or a 10.7 
> MHz IF scanner
> > might be tuned to 155.97 (also a Minnesota DOT frequency). 
> > 
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