Comparing Elevated 1/4w Vertical vs. Link Dipole with WSPR

Discussion in 'Amateur Radio News' started by K5ACL, Nov 15, 2017.

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  1. K5ACL

    K5ACL Premium Subscriber QRZ Page

    Hello Ham Radio Ops,

    K5ACL from SignalSearch here with another Antenna comparison/testing video using the Weak Signal Propagation Reporter (WSPR) network.

    Testing out an elevated 1/4w vertical vs Link Dipole using a simultaneous WSPR transmitter that was homebrewed by W6LVP - thanks Larry! I'll run the test on 20 & 40m only (40m using a portion of coil on the Vert. antenna) at 500mW.

    The results were a bit surprising since I chose to only use 1 radial on the vertical. I've done switching comparisons before, but never a simultaneous one. DXplorer.net (Premium subscription comes with the WSPRlite device from SOTAbeams, but the basic service is free) offers a really neat way to compare antennas with some valuable information.



    Hope you enjoy!

    73
    K5ACL
     
    N7LGK, AA7NM, KC8VWM and 3 others like this.
  2. AK9S

    AK9S Premium Subscriber QRZ Page

    I believe your results match with what would be expected considering elevation radiation lobes and angles of radiation involved. That said, it is always refreshing to see actual test data, especially when comparing antennas.

    It is nice to see real numbers and trends in experimental testing. Good job and thanks for sharing.
     
    K0RKH and K5ACL like this.
  3. KB4QAA

    KB4QAA XML Subscriber QRZ Page

    Inquiring minds want to know how beer cans compare against bed springs... ahem.
     
    W8NSI, K5ACL, W6MQI and 1 other person like this.
  4. KB1HQS

    KB1HQS Ham Member QRZ Page

    Interesting video, thanks for sharing. Subscribed for more videos.
    I would like to see how delta loops (or other loop variant) stacks up.
     
    WJ8Y and K5ACL like this.
  5. KM4DYX

    KM4DYX XML Subscriber QRZ Page

    Interesting video, and nicely done, Staff Sergeant. Thanks for posting.

    73,
    Al
     
    K5ACL likes this.
  6. K5VOU

    K5VOU Ham Member QRZ Page

    1/4w is usually interpreted as 1/4 of a Watt. 1/4 lambda with the Greek small l should be used but QRZ won't let you use it.
     
    K5ACL likes this.
  7. NK9Y

    NK9Y Subscriber QRZ Page

    Well done. Correlates nicely with my findings years ago on 160, only with more power. Get those verticals off the ground guys. Forget the ground screen of miles of wire. A single elevated counterpoise will do the trick, and the bandwidth will only be slightly narrower.
     
    W8NSI, K5ACL, K4BAD and 1 other person like this.
  8. WQ2H

    WQ2H Platinum Subscriber Platinum Subscriber QRZ Page

    Very nice report - keep up the good work!
    73
    Jim, WQ2H
     
    K5ACL likes this.
  9. N4GFH

    N4GFH Ham Member QRZ Page

    Very interesting comparison. I have to agree with the last post. I always have better results by keeping the counterpoises elevated.
     
    W8NSI and K5ACL like this.
  10. K6MTS

    K6MTS XML Subscriber QRZ Page

    Interesting, thanks for sharing.
    Liked some of the slick vid effects at beginning and showing equip setup too!
     
    K5ACL likes this.

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