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Thread: What are the main/most prevalent RFI/emissions sources detremental a ham operator?

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  1. #21
    Join Date
    Jun 2001
    Location
    EN82
    Posts
    482

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    Quote Originally Posted by WB2WIK View Post
    -Not "generators" as much as "unintended receptors" of interference have been some of my GFCI outlets. Even some brand new ones; seems to vary with brand and model, and probably length of wiring, outlet location and other things. But I've had to experiment to find ones that don't "trip" off when I transmit with high power on certain amateur bands.
    Agreed - I've got two GFCI outlets in my apartment, that when I tx on 80 m, pop out without fail. Even as low as 5 W...

  2. #22
    Join Date
    Jun 2011
    Location
    $FFFE
    Posts
    8,085

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    The biggest sources in my QTH are
    1) Weenergies: Somewhere there's a bad connection on a power line (although this has been better than usual lately)
    2) The smallest wall-wart in my house
    3) X10. Lamp modules, mostly, but of course there's noise when issuing a command.
    4) Ethernet. Nothing I've tried gets rid of the hash generated by my network. Although, it's nowhere near as offensive as the other sources.

  3. #23
    Join Date
    Nov 2004
    Location
    Western Michigan. Great summers but nasty winters.
    Posts
    15,580

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    I have a couple surveillance cameras that make noise on HF. I just turn them off if they are a bother, but I could see that not being an option if the cameras were on a close neighbor's house.
    73
    Mark, K8MHZ

  4. #24
    Join Date
    Jan 2003
    Location
    Michigan
    Posts
    6,777

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    Routers.

    My Linksys WRT54G sits on a bench under my operating position and creates very narrow birdies on the following frequencies:

    7.017
    24.900
    24.904
    10.104.5
    10.121.75
    14.030
    21.022
    73 de Bob - AB8MA

  5. #25

    Default What are the main/most prevalent RFI/emissions sources detremental a ham operator?

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  6. #26
    Join Date
    Aug 2010
    Location
    Lake Stevens, WA
    Posts
    4,645

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    Quote Originally Posted by AB8MA View Post
    Routers.

    My Linksys WRT54G sits on a bench under my operating position and creates very narrow birdies on the following frequencies:

    7.017
    24.900
    24.904
    10.104.5
    10.121.75
    14.030
    21.022
    I have the same router and I hear the birdies on 30M only. Thanks for pointing this out.

  7. #27
    Join Date
    Aug 2010
    Location
    Lake Stevens, WA
    Posts
    4,645

    Default

    I have it on 14.030 also. Dang!

  8. #28

    Default

    Electric fence charger.

    Washing machine - that one was horrible.

    I've not had any noticeable problems with CFL, and I once had every light on then off in the entire house to no audible change.
    This Space Intentionally Left Blank

  9. #29
    Join Date
    Jan 2000
    Location
    Commerce MI (Detroit area)
    Posts
    8,329

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    The most powerful noise source affecting ham radio and AM broadcasting is LIGHTNING, not man made, but Nature's QRN, can disrupt 160, 80 and 60 M and AM BC signals for most of the summer season.
    Storms up to 50 miles away in daylight can wipe you out and at night, anywhere in North America can crash thru my QSOs.
    Some annoying man made noise comes from small kitchen appliances like electric mixers and blenders !
    Noisy motors send out spark noise thru the AC cords and into the house wiring.
    My curly light bulbs seem rather quiet here.
    Last edited by K8JD; 12-06-2012 at 04:42 AM.
    73.....JD, FISTS #3853,cc 455,SKCC # 1395,tribune #12,
    Official US Taxpayer

  10. #30

    Default

    In my area:

    1. Grow Lights... Three of them within a few miles are destroying the ham bands for about a two mile radius... five hams affected... One loses all of HF every night with 30 over S9 signal. I only loose 40 and 30 meters each night with a 10 to 15 over S9 signal.
    2. Power Line Noise, power company is good about fixing
    3. Little devices with motors in them... Like my wife's food chopper...
    4. The other five hams living within 1/2 mile of me... They operate too much... All but for the one who looses all of HF every night...

    Long saga of the RFI on my Web Site...

    73's
    Dave
    For equipment reviews and setups see:
    http://www.nk7z.net

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