Track Movement of Milky Way With Amateur Radio Telescope

Discussion in 'Amateur Radio News' started by W0PV, Oct 2, 2019.

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  1. W7SJP

    W7SJP Subscriber QRZ Page

    A most excellent article John--thanks for the link! 73
     
  2. WB1BQE

    WB1BQE Ham Member QRZ Page

    The gods must have spoken to me directly on this one - I already had the exact SDR enroute from Amazon when I tripped across this article. (I also do astrophotography, and this looks like it would mount nicely on an AVX! )

    My question is whether anybody knows approximately what the gain of the homebrew horn shown in this article is? (And would something circularly polarized such as a Helix yield a better result? (Sorry for my ignorance - up to now, "Microwaves" to me meant getting on the local 70cm repeater... :)

    --al
    WB1BQE
     
  3. W0PV

    W0PV Ham Member QRZ Page

    Al, in the fifth paragraph of the linked article cited in the OP the author Dave N2LVD stated, "An online calculator showed that a horn of those dimensions would have a respectable directional gain of 17 decibels."

    73. John, WØPV

    PS - I momentarily stopped making QSO's in CW Sweepstakes just to answer this question :p
     
  4. WB1BQE

    WB1BQE Ham Member QRZ Page

    Sorry - I worded my question poorly. I was wondering how close something like that could get to the theoretical gain, given some amount of mechanical imperfection. (And in the case of my antennas, Substantial mechanical imperfections... :) )
     
  5. K1FQL

    K1FQL XML Subscriber QRZ Page

    When I looked for the dongle and the gizmo, I found that the link in the IEEE online article takes us to the Nooelec device that does not have a bias-T. The dongle with a bias-T provides an easy way to provide DC power to the gizmo via the gizmo output SMA connector. I posted the correct link in the comment section of the online article.
    https://spectrum.ieee.org/geek-life...f-the-milky-way-with-this-diy-radio-telescope
    I hope that this will help those who want to work on this project.
     
    WB1BQE likes this.

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