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  • [G3XBM] Antenna fault?

    From G3XBM via rec.radio.amateur.moderat@21:1/5 to All on Wed Jun 2 01:32:03 2021
    XPost: rec.radio.amateur.moderated, uk.radio.amateur, free.uk.amateur-radio

    Roger G3XBM's (Mainly) Amateur Radio Blog

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    Antenna fault?

    Posted: 01 Jun 2021 10:10 PM PDT http://g3xbm-qrp.blogspot.com/2021/06/antenna-fault.html


    Last evening was the 2m activity contest. I usually use the big-wheel omni antenna and 10W. Last evening the SWR was high. Perhaps after many years I
    have got some corrosion or water in the coax. My problem is I cannot do
    ladder work because of my poor health and depend on other people for
    detective work. 😢

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    Sunspots - Wednesday June 2nd 2021

    Posted: 01 Jun 2021 09:38 PM PDT http://g3xbm-qrp.blogspot.com/2021/06/sunspots-wednesday-june-2nd-2021.html


    Solar flux is 75 and the SSN 20. A=3 and K=1.

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    PI4 decoders

    Posted: 01 Jun 2021 06:49 AM PDT http://g3xbm-qrp.blogspot.com/2021/06/pi4-decoders.html


    A lot of beacons now have PI4 sequences. I have no idea how this compares with the more common WSPR digital mode. Looking around for decoders I
    spotted this from OZ2M.
    See https://rudius.net/oz2m/software/pi-rx/ .

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    8m beacons

    Posted: 01 Jun 2021 06:42 AM PDT http://g3xbm-qrp.blogspot.com/2021/06/8m-beacons.html


    On John Desmond EI7GL's blog there is a very useful list of 8m beacons. On
    his blog are also 5m beacons. I hope John does not mind me copying part of
    his image here. If there is a problem, I can remove the post.
    There is always lots of good stuff on his excellent blog. I see he also reported a recent Australia-Europe opening on 6m.
    See https://ei7gl.blogspot.com/p/40-mhz.html.




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    10m FT8 RX today (Tuesday) with the 10FT8R and the tiny indoor loop

    Posted: 01 Jun 2021 09:02 AM PDT http://g3xbm-qrp.blogspot.com/2021/06/10m-ft8-rx-today-tuesday-with-10ft8r.html


    It is now 0855z. I have been on 10m FT8 RX for about 30 minutes and have spotted 11 stations so far using the 4 transistor RX and indoor loop.
    UPDATE 1601z So far today, 98 stations spotted on 10m FT8 RX. See map.


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    The complete crystal replacement?

    Posted: 01 Jun 2021 01:52 AM PDT http://g3xbm-qrp.blogspot.com/2021/06/the-complete-crystal-replacement.html


    Thanks for the feedback on the Si5351 as a replacement for crystals.
    It would appear that a low cost micro-controller has to be put alongside
    the Si5351 synthesiser. I wonder if anyone has a complete solution designed
    and tested. Also, what about programming?
    It would seem that there is a real need for a simple KISS way to replace crystals, so I'd be surprised if someone has not already done this.
    According to Peter Marks the controller should only be a few dollars. This feedback (that you have to tell the Si5351 the frequency every time) is
    also what Jay told me.
    It looks like a total solution that also replaces the oscillator should be possible for under $10.
    Please let me know of any links.

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    10m FT8 RX yesterday

    Posted: 31 May 2021 11:37 PM PDT http://g3xbm-qrp.blogspot.com/2021/06/10m-ft8-rx-yesterday.html



    Stations spotted yesterday
    Yesterday I was on 10m FT8 RX with the homemade 10FT8R RX with 4
    transistors and the tiny indoor loop antenna. 127 stations spotted. Not bad
    for something so simple. Details are on the G3XBM website.

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