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Thread: SWR question (Bad swr on higher power only) 2 meter

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  1. #1
    Join Date
    Sep 2003
    Location
    Glendora, CA
    Posts
    133

    Default SWR question (Bad swr on higher power only) 2 meter

    Hi, I have a copper J-pole on the roof of my house. My swr on 146.520Mhz FM is as follows:

    1/2 watt = between 1.0:1 and 1.1:1
    9 watts = 1.2:1
    130 watts = 2.5:1
    160 watts = 4.5:1

    Why would it be so good on low power and bad on high power?

    P.S. I am running RG8-X (mini-8) coax. (about 60')

    Thanks,
    73's

  2. #2

    Default

    Sounds like a problem with the SWR meter. What are you using for that?
    A government which robs Peter to pay Paul can always depend on the support of Paul.

    -- George Bernard Shaw

  3. #3
    Join Date
    Sep 2003
    Location
    Glendora, CA
    Posts
    133

    Default

    NCG 3000 (Same as MFJ-873 Grandmaster).

    http://www.eham.net/reviews/detail/4318

  4. #4
    Join Date
    Sep 2003
    Location
    Glendora, CA
    Posts
    133

    Default

    My bad, I didnt re-calibrate meter when I switched to high power. I guess I need to CAL if I want to check different power levels... So at 130 Watts its 1.3:1

  5. #5

    Default

    Quote Originally Posted by KE6DJX View Post
    My bad, I didnt re-calibrate meter when I switched to high power. I guess I need to CAL if I want to check different power levels... So at 130 Watts its 1.3:1
    Yep. You need to CAL any time you change power at all, and usually also if you change frequencies or change antennas.
    A government which robs Peter to pay Paul can always depend on the support of Paul.

    -- George Bernard Shaw

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