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Search results

  1. Alexis Mercado

    ASTROPLANE best vertical antenna ever?

    nfsus, I tried to adjust the legs that hold the loop with no success. What I did was to replace the stainless steel capacity hat with shorter aluminum ones. Mine was resonant around 26,855 and by shortening the capacity hat with shorter one did the trick. It makes the antenna shorter...
  2. Alexis Mercado

    ASTROPLANE best vertical antenna ever?

    What frequency you get the lowest SWR ?
  3. Alexis Mercado

    ASTROPLANE best vertical antenna ever?

    I I modified the capacity hat because resonance was way to low, below channel one, now resonance is close to channel 20. Aluminum shorter radials Diam. of radials= 0.165” = 1/8” = 4.20mm Length = 20 3/4” . 21” to center of eyelet. With a bandwidth around 2.100 MHz. I thought it was...
  4. Alexis Mercado

    ASTROPLANE best vertical antenna ever?

    What is the bandwidth of this antenna ?
  5. Alexis Mercado

    Snapped Super Magnum Antenna

    How much power do you think it will take?
  6. Alexis Mercado

    Snapped Super Magnum Antenna

    # 14 gauge
  7. Alexis Mercado

    Snapped Super Magnum Antenna

    10 turns. The fourth one is the tap.
  8. Alexis Mercado

    President McKinley

    That’s what I was afraid of. Thanks.
  9. Alexis Mercado

    President McKinley

    I got a second hand almost new President McKinley USA model from a guy who didn’t want it because it does not have the freeband frequencies. I did a quick search on Google and could find a modification for it. Is is a switchmode module. There are a couple of YouTube videos on how to install...
  10. Alexis Mercado

    Snapped Super Magnum Antenna

    it is a loading coil. See pic
  11. Alexis Mercado

    what is your vswr at the antenna?

    freecell, you are right, we agree with that. The longer the cable and the higher the frequency, the more attenuation will be present, but that’s another story.
  12. Alexis Mercado

    Does Cable Length Affect SWR?

    Very easy. Take an antenna analyzer and tune the antenna with a short jumper ( about 14 feet if you don’t like to be close to the antenna ) take measurements and tune it to lowest SWR ) . No matter the length of coax you use, it is supposed to be 1.0 to 1.2. That fall within the antenna specs...
  13. Alexis Mercado

    Antenna Specialists Super Magnum

    I finally found out what was wrong. After the tap I wounded 6 turns. I had to replace the enameled wire again, on the fourth turn I solder the tap, then added 9 more turns. This time it gave me the following results: SWR———FREQUENCY———R———X 2.0—————-28,050————-33———23...
  14. Alexis Mercado

    Modified Vector 4000

    Thanks Marconi.
  15. Alexis Mercado

    Modified Vector 4000

    El kabong What type of roof you have ? I had issues with my Vector 4000 because I had a concrete roof made of concrete and rebars. It was a pain in the ass to tune it. First I tuned it on a 10 feet mast on the backyard. When I installed it on the roof SWR went up had to tune it again. I could...
  16. Alexis Mercado

    Antenna Specialists Super Magnum

    Sorry to resurrect this old thread. I am trying to tune this antenna according with specs given here. something is weird with this thing. Without radials, it tunes close to 28,500 , SWR close to 1.2. As long as I install the radials, it resonates on 44,750 MHz. When I touch the coil,it goes...
  17. Alexis Mercado

    Base Bad modeling examples presented.

    Don’t worry. You’ll figure it out.
  18. Alexis Mercado

    Base Bad modeling examples presented.

    Jeje, I know. You’ve been using that image for years. Are you going to replace it ?
  19. Alexis Mercado

    Base Bad modeling examples presented.

    Hi Marconi. What happened with your picture ?
  20. Alexis Mercado

    Base More Pattern Overlays

    Ahh, too many colors gave me a headache !. Just kidding.