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  • [G3XBM] 8m NoV application

    From G3XBM via rec.radio.amateur.moderat@21:1/5 to All on Mon Oct 4 18:55:03 2021
    XPost: rec.radio.amateur.moderated, uk.radio.amateur, free.uk.amateur-radio

    Roger G3XBM's (Mainly) Amateur Radio Blog

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    8m NoV application

    Posted: 03 Oct 2021 03:47 AM PDT http://g3xbm-qrp.blogspot.com/2021/10/8m-nov-application_3.html


    Having heard nothing extra, I propose to complete and submit my 8m NoV application tomorrow. Let's hope this is successful.
    A reminder, OFCOM now does NoVs online and wants a sketch of the proposed antenna and ERP to ensure public safety. I would be amazed if this is an
    issue.

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    10m FT8 RX (Sunday)

    Posted: 03 Oct 2021 02:09 PM PDT http://g3xbm-qrp.blogspot.com/2021/10/10m-ft8-rx-sunday.html


    At about 0845z, my 10FT8R was turned on on 10m FT8 RX. No spots yet after
    5 minutes.
    UPDATE 1100z: 7 stations spotted, with furthermost IW8PQ (1928km) in Italy. UPDATE 1235z: 13 stations around Europe spotted so far on RX.
    UPDATE 2110z: 87 stations spotted today on 10m FT8 RX. QRT.

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    20FT8R or 15FT8R anyone?

    Posted: 03 Oct 2021 01:48 AM PDT http://g3xbm-qrp.blogspot.com/2021/10/20ft8r-or-15ft8r-anyone.html


    Whilst playing with the 10FT8R something occurred to me. With FT8,
    oscillators only have to be stable over 15 seconds. Many free running HF oscillators are far more stable than this even long term.
    So, I think the crystal can be replaced by a just a tuned circuit making
    this receiver work on any HF FT8 frequency. All that really matters is reasonable long term stability and good short-term stability. All that's required is to scale the RF tuned circuit (one tuned circuit) and set the oscillator to half the FT8 frequency needed. I have not tried this but
    cannot see why it should not work.
    This may work as high as VHF where I have made free running oscillators
    work even on 2m.
    Do not be afraid to experiment!
    This should make the whole receiver very low cost indeed. It would not
    surprise me if many can make the entire RX for less than the cost of one
    coffee out.

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    Sunspots - Sunday October 3rd 2021

    Posted: 02 Oct 2021 11:36 PM PDT http://g3xbm-qrp.blogspot.com/2021/10/sunspots-sunday-october-3rd-2021.html


    Solar flux is 87 and the SSN 25. A=8 and K=2.

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