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Type: Posts; User: VK2AJS

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  1. Beware the chinese 2.4GHz multi-element yagis on...

    Beware the chinese 2.4GHz multi-element yagis on ebay. Some of them are usable only on certain wifi channels with atrocious SWR elsewhere. I've purchased a few duds & it's good to be able to show the...
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    The DBJ-2 has a MURS version...

    The DBJ-2 has a MURS version https://edsantennas.weebly.com/
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    https://patents.google.com/patent/US20120119968A1/...

    https://patents.google.com/patent/US20120119968A1/en
  4. Even with the analyser fixed at 50ohm output Z,...

    Even with the analyser fixed at 50ohm output Z, terminating the 300ohm lengths of ribbon with a 47ohm resistor & looking for SWR minimums gives much more consistent results, both in terms of the...
  5. velocity factor via vector impedance analyser

    I got the bright idea of trying to use an N1201SA portable vector impedance analyser to find the velocity factor of some 300 ohm TV ribbon. I figured just connect a random length of open circuit...
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