Antenna Comparison on 6m During a Sporadic-E Opening on the Icom 7300 2

Icom 7300 on 6m during Sporadic-E Opening

Icom 7300 on 6m during Sporadic-E Opening

This Sporadic-E season I’ve been using my Icom 7300 to operate from home. Last year I really got into 6m but could only operate when I was out portable and often conditions were hit or miss when I happened to be on a hill. This year I am QRV from the new QTH and can jump in the shack when conditions are good and make a few QSO’s (normally during my lunch hour when working from home!).

The Icom 7300 waterfall display has really helped quickly see 1. if any activity is about 2. jump on signals quickly. It’s easy to miss stations when just tuning up and down by ear, especially with the rapid nature of Sporadic E contacts.

I’ve been operating on 6m using two less than ideal antennas:

1. Western HF-10 which is a modified half size G5RV using a 30m RG58 coax run (quite lossy on RX/TX at 50 MHz)
2. Diamond V2000 colinear using a 20m Ecoflex 10 coax run

I was interested to see how they compared during a recent opening on 6m, so I hooked up an antenna switch so I could compare the two side by side:

Interesting results – as you can see on this HA signal the V2000 came out as being 5 S points better than the Western HF-10. Not to say this would always be the case, especially for Sporadic E signals from either nearer in or further out – but interesting nonetheless! Further research needed – especially once I’ve upgraded the coax on the Western HF-10 to Westflex 103 – too much loss at 50MHz using RG58 🙁

2 thoughts on “Antenna Comparison on 6m During a Sporadic-E Opening on the Icom 7300

  1. Reply Mark Longson Oct 13,2017 20:48

    What antenna was the HA0LZ using? If he was using a vertical at his end it could account for the massive difference in signal strength, although during SP-E the polarisation of the signal can suddenly change!
    There are two advantages using a vertical, first the low angle of radiation, and second omni-directional coverage, no rotating beams if conditions shift quickly.
    Obviously with a yagi the extra gain can be welcome on extremely weak signals and for long distance Transcontinental paths.

    Whenever I tried using a multi-band wire antenna my results were not good on 6m.
    But hey its all very interesting seeing others doing similar tests.
    Verticals can work very well especially when there are big E’s openings.

    As for me, I use a Delta Loop low to the ground and in a fixed position.
    So I may actually consider putting a vertical up for 6m and see how well I do with that.
    thanks for the Video 73 Mark G0NMY

    • Reply James Stevens Oct 27,2017 09:01

      Thanks for your comments Mark. I don’t know what he was using, but that would certainly be a factor, also I guess the polarisation could change after bouncing off the sporadic-E soup?

      A yagi would be better for real DX but still surprising what can be worked on less than optimal antennas 🙂

      73, James M0JCQ

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