Let's get a repeater on the moon!

Discussion in 'General Announcements' started by W5LMM, Nov 2, 2016.

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  1. W7UUU

    W7UUU QRZ Lifetime Member Number 133 Administrator Volunteer Moderator Platinum Subscriber Life Member QRZ Page


    Why not? A satellite is an object that orbits another object. The moon is our "natural satellite" - a repeater on the moon IMO most certainly would be "a satellite" - and a pretty darn reliable one, at least as far as "the vehicle" is concerned - it's been faithfully being a satellite for, well, quite some time now :)

    Dave
    W7UUU
     
  2. AD5KO

    AD5KO Ham Member QRZ Page


    I like your thinking. :)
     
    W7UUU likes this.
  3. KG4RUL

    KG4RUL Ham Member QRZ Page

    The problem is that a signal takes approximately 2.6 seconds to make the lunar round-trip. The average user of a linked repeater system can't get the idea that you press the PTT then wait for the repeaters to setup. Make them wait 2.6 seconds and EVERY transmission will have the first words cut off. THEN there will be the same ones who dominate a satellite pass who will think the repeater is theirs at all times. This appears to be a classic Charlie Foxtrot.
     
    N2EY, W5LMM and (deleted member) like this.
  4. AI3V

    AI3V Ham Member QRZ Page

    If I did that math right, for a 100 watt tx, and 3 element yagi antennas on earth and the moon, you will get 2 microvolts at the moon RX, on the 2m band



    Typical FM RX sensitivity is better than 10db sinad at .5uv.

    This would be a near full Quieting link with a VERY average station.

    Or about the same signal a taxi or fire truck makes.

    I once read a article from a fellow who claimed to be the guy who had to pick a clear channel for Neil and Buzz to talk back to earth. Problem was not building some super special moon talk radio, but finding a frequency not in use anywhere on the planet.

    Rege
     
  5. AI3V

    AI3V Ham Member QRZ Page

    You would need a awful lot of aluminum foil !

    Moon reflects around 7% of the radio wave back to earth as it is.

    Rege
     
  6. AD5KO

    AD5KO Ham Member QRZ Page


    For the hats?

    I already have one. :rolleyes:
     
  7. N0ISS

    N0ISS Ham Member QRZ Page

    Send Astronauts to the moon again and let them build an Tower on the moon with Solar Powered and it will be all good Problem solved.

    you got your satellite which will be powerful and reliable. ;)
     
  8. K8ERV

    K8ERV Ham Member QRZ Page

    A repeater on the moon might be a bit difficult to maintain, especially in the winter with all that snow----

    TOM K8ERV Montrose Colo
     
    WA7PRC likes this.
  9. W0IS

    W0IS Ham Member QRZ Page


    Popular Electronics in the 70's had an interesting article on SWL'ing from the moon. With a relatively modest receiver, many terrestrial FM and TV stations could be heard. The situation has changed somewhat with most countries on Earth switching to digital broadcasting, but a number of FM stations could be listened to quite easily.

    http://onetuberadio.com/2015/05/10/dxing-from-outer-space/
     
    W5WAY likes this.
  10. N7ZAL

    N7ZAL Ham Member QRZ Page

    Do we really need to junk up the moon any more? Seems we are treating outer space the same as our trashed earth. I can understand the desire but sometimes we should think first...JMO
     

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