6m and 2m EME with a Moxon?

Discussion in 'Ham Radio Discussions' started by ON6KE, Oct 24, 2018.

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  1. ON6KE

    ON6KE Ham Member QRZ Page

    Hi,
    did anyone ever work EME with a 6 or 2 m Moxon? Results?


    73, good DX
    Gust ON6KE
     
  2. KA0HCP

    KA0HCP XML Subscriber QRZ Page

    With only 5 dB? Not likely.
     
  3. KK5JY

    KK5JY Ham Member QRZ Page

    You might be able to stack a few Moxons to get the kind of gain you would need. The footprint might be more compact than that of larger yagis, if that helps.

    The moon's albedo is quite low (12%-ish), and the surface is rough, with generally non-conductive materials (at least at the places checked by the Apollo missions and by robots). Even neglecting the (considerable) path loss, the reflection loss by itself is rather high.

    Given the allocations available to US hams, I'm surprised there aren't more people doing laser-based EME...
     
  4. W6UV

    W6UV Premium Subscriber QRZ Page

    Higher frequencies help as antenna sizes get smaller as frequencies go up, but you have to balance that against the increased difficulty of generating high power at higher frequencies.

    I think 70cm is a good compromise band for EME, but it doesn't seem to be as popular as 2m, so there are fewer people to work.
     
  5. W6RZ

    W6RZ Premium Subscriber QRZ Page

    The RF albedo is a little lower at 6.5%. But the diameter of the moon gives you about 115 dB of "gain". When the beamwidth of your antenna becomes less than the angular diameter of the moon (about 1/2 degree), you start to lose some of that "reflection gain". So unless you can find one of NASA's retroreflectors, laser EME isn't effective.
     
  6. KJ4UO

    KJ4UO Ham Member QRZ Page

    Lets place a repeater on the moon :D
     
  7. KC8VWM

    KC8VWM Ham Member QRZ Page

    Things might get sticky when trying to meet the control operator requirements... Lol
     
  8. KK5JY

    KK5JY Ham Member QRZ Page

    Just think of it as a satellite on a satellite.
     
  9. NL7W

    NL7W Premium Subscriber QRZ Page

    Seems a bit fanciful, eh! :D
     
  10. KA2RRK

    KA2RRK Platinum Subscriber Platinum Subscriber QRZ Page

    Isn't something like a 10deg beam width needed?
    Aswell as about 25dbd?
    And really close to one kw TX power?

    We need more power, I want to bounce off Jupiter's storm...

    KA2RRK
     

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