So there's this dish...

Discussion in 'VHF/UHF - 50Mhz and Beyond' started by AA9G, Aug 23, 2014.

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  1. AA9G

    AA9G Ham Member QRZ Page

    mounted to my house and left behind by a previous owner. It's one of the small ones, DTV I think. Doe's anyone know of anything ham useful that could be done with it?
     
  2. K8XW

    K8XW Ham Member QRZ Page

    Bird bath

    Dan
     
  3. W9GB

    W9GB Ham Member QRZ Page

    The 18 to 24 inch satellite dishes are designed for reception from High power satellite transmitters 10 - 13 GHz.

    Amateur Radio operators have many allocations above 1 GHz.
    When OSCAR 40 (AO-40) was operational,
    these dishes were a very popular conversion for 2.3 GHz reception (telemetry beacon, linear transponder).

    VHF/UHF amateur radio experimenters adopt these for 10 GHz and 24 GHz usage.
    European Radio Amateurs are more enthusiastic about these frequencies.

    Paul Wade, W1GHZ : 10 GHz and Above enthusiasts web page.
    http://www.w1ghz.org/10g/10g_home.htm

    Paul also wrote articles on how to convert the LNB (Low Noise Block downconverter) for amateur usage.
    http://www.w1ghz.org/10g/10g_home.htm

    What is a LNB ??
    http://en.m.wikipedia.org/wiki/Low-noise_block_downconverter
     
    Last edited: Aug 23, 2014
  4. K7MEM

    K7MEM Ham Member QRZ Page

    I used one to extend my WiFi in the house to the barn. I ripped out the LNB and replaced it with a antenna element. Then ran some RG-6 to the computer. It worked pretty well but I have now replaced it with a small yagi.

    The previous owner for my current house left behind a large 10-12' dish. I had no use for it so I gave it to a neighbor to use as a fish pond.
     
  5. KE4VNC

    KE4VNC Ham Member QRZ Page

    remove the lnb and coat the surface with mylar - solar soldering iron. wear welding goggles though
     
  6. KC8VWM

    KC8VWM Ham Member QRZ Page

    [​IMG]

    Ah yes... fun with a camera tripod with a direct tv dish mounted on top. :)

    Wifi dish to link wifi from the shack PC to the wireless router in the house. (about 150' away)
     
  7. K8JD

    K8JD Ham Member QRZ Page

    I put a little microfone at the focal point and used a battry powered amp and eaprhones to listen to everything around the neighborhood. birds, kids, traffic , dogs brking a mile away. Very directional.
     
  8. W9GB

    W9GB Ham Member QRZ Page

    Robert Suding, W0LMD was very active a decade ago at Central States VHF/UHF, and AMSAT conferences
    in the usage of "Big Ugly Dishes" (BUD) and surplus 18" - 24" satellite dishes (Primestar, DISH, DirecTV).
    http://www.bowkera.com/w0lmd.htm

    He had a dedicated web page (ultimatecharger.com) for the DIY Builder (AMSAT, EME, meteor scatter, radio astronomy, etc.)...
    that web page was taken down a few years ago --

    Paul Wade, W1GHZ analyzed the DIY feed ("L" and "S" band) for these dishes.
    http://www.w1ghz.org/antbook/conf/W0LMD_patch_feed.pdf
     
    Last edited: Aug 28, 2014
  9. W9GB

    W9GB Ham Member QRZ Page

    Here is what is possible -- Use the Internet Wayback Machine !!!

    Various amateur radio stations using dishes for EME, satellite, or weak signal VHF/UHF/Microwaves
    https://web.archive.org/web/20060618203458/http://www.ultimatecharger.com/Dishes_stations.html

    Robert Suding, W0LMD -- Dishes he has built or converted for other radio amateurs.
    https://web.archive.org/web/20070203085800/http://www.ultimatecharger.com/Dishes_my.html

    Dish Rotators
    http://web.archive.org/web/20070827094458/http://www.ultimatecharger.com/Dish_Rotators.html

    First Photo
    30" x 20" DirectPC dish on big gear and mini tracker arm mount

    Second Photo
    24" (60 cm) Direct TV dish with 5 1/2 turn Helix feed into AIDC 3731 downconverter on Bowling Ball mount,
    made for AO-40 mobile operation.
     

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    Last edited: Aug 28, 2014
  10. KB2FCV

    KB2FCV Ham Member QRZ Page

    Thanks for the links! I saw some good ideas at some of those links. I'm working on getting a 10 foot TVRO dish setup for EME on 1296. I'm still working on some construction items (brackets, plates, etc) but should be playing with az-el control in the basement for the winter project if all goes to plan.

    I know some folks have played on the higher ghz ranges with the smaller dishes. My neighbor just took one off his house.. I should see if he still has it.. could be fun to mess around with.
     
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