• [G3XBM] Rybakov HF verticals

    From G3XBM via rec.radio.amateur.moderat@21:1/5 to All on Sat Jun 18 11:28:57 2022
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    Roger G3XBM's (Mainly) Amateur Radio Blog

    Rybakov HF verticals

    Posted: 18 Jun 2022 03:41 AM PDT http://g3xbm-qrp.blogspot.com/2022/06/rybakov-hf-vericals.html

    These are end-fed antennas for HF usually. Commercial versions are

    Some years ago I bought one from SRC in Wales. Although I believe this is
    no longer available, they all have one thing in common: the end of the
    antenna is a high impedance, so a transformer is needed to get the SWR into
    the range of auto ATUs found on modern rigs. Usually this is an UNUN built
    into the antenna.
    In getting things together for my free PDF book, I realised this was absent from my website! This is now corrected. As mine had been unused in the back
    of the garage, I swapped mine for an active RX antenna that works well. The swap was with Jason M0NYW.
    See https://sites.google.com/view/g3xbm4/home/antennas/x80_1 .

    8m experiment (Saturday)

    Posted: 18 Jun 2022 05:29 AM PDT http://g3xbm-qrp.blogspot.com/2022/06/8m-experiment-saturday_18.html

    As usual, I am on 40.680 MHz USB dial QRP FT8. Already spotted very
    strongly by EA3ERE (1153km) in northern Spain.
    My usual pattern is to be on for about one hour. let the rig thoroughly
    cool and then come on again afterwards. It would seem Es allows modest QRP stations, like mine, to enjoy the fun.
    It is now about 0931z.
    UPDATE 1230: Still just EA3ERE spotting me and nobody spotted here. Now
    QRT as the rig cools.

    Sporadic-E (Es)

    Posted: 18 Jun 2022 12:23 AM PDT http://g3xbm-qrp.blogspot.com/2022/06/sporadic-e.html

    We are currently at the peak of the Es season in the northern hemisphere. Yesterday 14 stations spotted me on 10m WSPR TX. All these look like they
    were by Es. My reports on 8m FT8 also look like Es. By the end of the
    summer the Es season will be over.
    The Es season usually lasts from April to August. The peak months are May,
    June and July. However Es can occur at any time. There is usually a much smaller peak just after Christmas.

    Sunspots - Saturday June 18th 2022

    Posted: 17 Jun 2022 10:56 PM PDT http://g3xbm-qrp.blogspot.com/2022/06/sunspots-saturday-june-18th-2022.html

    Solar flux is 149 and the SSN 152. A=13 and K=3.

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