12 Volt rotor for small portable antennas

Discussion in 'Amateur Radio News' started by KK6USY, Feb 24, 2021.

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  1. KK6USY

    KK6USY Ham Member QRZ Page

    This was built to be light weight and portable my home TV rotator and antenna both run on 120 wall plug , but might be 12 or 24 volt . Great questio!
    KI5DNS likes this.
  2. KF7PCL

    KF7PCL Ham Member QRZ Page

    One way I could think to do it would be to run the motor power through two NC limit switches and have an (opposite facing) diode in series with each switch. Then have a post the hits the switch on each end of the rotation.
    KK6USY likes this.
  3. M0VUE

    M0VUE XML Subscriber QRZ Page

    That's quite good. I've also been making 12v antenna rotators. What I've done is designed a back plate where you put all the components onto it and it uses a simple geared motor to drive a belt to the rotator shaft. Simple but effective, they are being tested now because I was thinking of selling them as kits.

    KI5DNS and KK6USY like this.
  4. W0RIO

    W0RIO Ham Member QRZ Page

    Another way to add stops to a rotator is to use Hall Effect switches. A few years ago I built a similar project for rotating a small camera
    with a gear-reduction motor:

    Note that the logic was done with a state machine programmed into a 2716 EPROM, a simple Arduino sketch would
    be a better way to go these days since most people don't have access to an EPROM programmer.
    KK6USY likes this.
  5. WU3U

    WU3U Ham Member QRZ Page

    It's the 1" version:
    KK6USY likes this.
  6. KI5DNS

    KI5DNS Ham Member QRZ Page

    I can tell yall are way above my head! LOL! I've been thinking about building the Yagi that was on QRZ earlier this month (Sorry, I don't know the gentleman's name). I have a dual band vertical that's not making the trip to the repeaters in two fairly close city's, so when I saw this I was very interested.
    My question is, is there any way to use a Rheostat so you could have a 360 degree radius and make something like a template of a compass so I could have some idea where I'm pointed? I've never built anything like this, so I was wondering if its doable? Thanks in advance for any help!
  7. AD5MB

    AD5MB Ham Member QRZ Page

    if you use magnetic reed switches or optical encoding you don't need things bumping into things

    you could encode degrees onto a wheel and get feedback on which way you are pointing. any arduino practicioner one step past beginner could do that
    KI5DNS, WB1E, KK6QMS and 1 other person like this.
  8. WB1E

    WB1E Ham Member QRZ Page

    KI5DNS likes this.
  9. W9FL

    W9FL Ham Member QRZ Page

    With thoughts of a 12 volt portable rotator, I have tested this RCA rotator plugged into a similar 12V to 120V power inverter, and found this to work just fine off a 12V battery. The rotator is 26 watts at 120 volts.

    So if anyone is interested in an off the shelf solution, this works.


    There are also other inverters for less money that would work:

    Another rotator that should work also:
    Last edited: Mar 1, 2021
    KI5DNS likes this.
  10. AD5MB

    AD5MB Ham Member QRZ Page

    Will there be a two axis satellite tracking version down the road?
    KI5DNS likes this.

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