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Search results

  1. freecell

    A question on whips...

    the resonant frequency of an antenna has nothing to do with "all elements being of equal (physical) length." a radio antenna is a form of tuned (L/C) circuit consisting of inductance and capacitance and as a result it has a resonant frequency. this is the frequency where the capacitive and...
  2. freecell

    A question on whips...

    492 ÷ 18 = 27.333 mhz.. 492 ÷ 18.098 = 27.185 mhz. 1.176 inches for a shift in frequency of 148 khz. or almost 15 channels.
  3. freecell

    A question on whips...

    the swr on the feedline has nothing to do with the fact that @ 102" your antenna is operating in the 10 meter amateur band. you've allowed your education by antenna manufacturers to interfere with your learning. feedline swr indicates whether or not the antenna is matched to the feedline. it...
  4. freecell

    A question on whips...

    1005 ÷ 27.185 = 36.968 984 ÷ 27.185 = 36.196 36.968 - 36.196 = 0.772 feet 0,772 X 12 = 9.264 inches. the difference is 9.25 inches, not 0.8 inches.
  5. freecell

    A question on whips...

    1005 ÷ fmhz. is the formula for a full wave driven loop element, not a straight full wave element. the formula for a full wave loop reflector element is 1030 ÷ fmhz.. 492 ÷ fmhz. is the formula for a center-fed 1/2λ dipole or an end fed 1/2λ vertical over real earth ground. as mentioned by...
  6. freecell

    HR2510 Increase Output.?

    here's how it works out with 100W from 0.5 dB. to 3.0 db. of power loss from a loss controlled line @ 50 ohms feeding a matched, purely resistive (load) antenna. 100W - 0.5 dB. = 89.10W 100W - 1.0 dB. = 79.40W 100W - 1.5 dB. = 70.80W 100W - 2.0 dB. = 63.10W 100W - 2.5 dB. = 56.20W 100W - 3.0...
  7. freecell

    Buddihex Antenna

    here's the event he was referring to, it was huge. powered by icom.
  8. freecell

    A question on whips...

    "can an "antenna analyzer" of any kind actually SEE resonance?" yes, most of them are capable of performing that function. there is no favoring either impedance over swr or visa versa because you can't have one without the other. for example, @ an swr of 1.5:1 there are only two purely...
  9. freecell

    Buddihex Antenna

    once in a while when tims at work in studio city you can catch him on 20m..
  10. freecell

    Buddihex Antenna

    he mentions the station in the video, first 5 - 10 seconds in from 23:00 timestamp. he operated the antenna in the KA6LMS "Last Man Standing" event. https://duckduckgo.com/?q=scenes+with+tim+allen+operating+KA6LMS+in+last+man+standing&t=h_&ia=web
  11. freecell

    Buddihex Antenna

    KA6LMS: the licensed station often seen in tim allens tv show Last Man Standing. https://duckduckgo.com/?q=KA6LMS&t=h_&ia=web
  12. freecell

    A question on whips...

    it's easier to shorten an antenna that is too long than it is to lengthen an antenna that is too short. when you can make it through an entire post on this particular subject without mentioning swr then you're catching on. you're welcome.
  13. freecell

    A question on whips...

    "putting a simple 102" whip with no spring... and my SWR was under 1.1:1 for the entire 40 channel band" you may have measured a 1.1:1 swr but the antenna was not resonant @ any frequency inside the cb band. 246 / 8.5 feet = 28.941176470588235294117647058824 mhz.. 246 / 9.049 feet =...
  14. freecell

    A question on whips...

    an antenna is in free space when the real earth ground beneath the elevated antenna has no affect or influence over the manner in which the antenna operates. using the free space formula for calculating antenna length for antennas that are not in free space will result in resonant operating...
  15. freecell

    HR2510 Increase Output.?

    https://www.audiocheck.net/blindtests_level.php?lvl=1
  16. freecell

    Procomm Quad Rod ?

    another copy of the van ordt powerstik antenna and they work well.
  17. freecell

    CB Tricks site UPDATES/THREAD MERGERS

    looks like the page is lost.
  18. freecell

    Base Identifying 5 element yagi (direct feed)

    maybe 1 of the 2 5 element arrays used in the hygain model 1110 db stacked duo-beam.
  19. freecell

    Procomm Quad Rod ?

    that's some funny stuff. https://www.worldwidedx.com/threads/which-mobile-antenna-would-you-choose-for-distance.261612/page-4#post-771182
  20. freecell

    First AM/FM FCC Approval

    "Still, I don't know why FM on CB wasn't legal a long time ago." in 1958 uhf equipment available @ the time was large, heavy and expensive.