• [G3XBM] 472kHz transverter fault

    From G3XBM via rec.radio.amateur.moderat@21:1/5 to All on Sat Sep 25 15:54:50 2021
    XPost: rec.radio.amateur.moderated, rec.radio.amateur.equipment, uk.radio.amateur
    XPost: free.uk.amateur-radio

    Roger G3XBM's (Mainly) Amateur Radio Blog

    472kHz transverter fault

    Posted: 24 Sep 2021 07:15 AM PDT http://g3xbm-qrp.blogspot.com/2021/09/472khz-transverter-fault.html

    Years ago, finding a fault would have been easy. Now, even in small steps,
    it is exhausting and hard.

    I think the issue is that the oscillator has stopped for some reason: I can detect nothing at 3.2MHz on a nearby RX. I shall look again at the weekend
    as now I am so so tired! Just a few minutes is so taxing now.
    This may be as simple as a dry joint. I guess the first thing to try is retouching all the solder joints in the oscillator. It is most likely to be this. I had a diode probe, but I have not seen it for years! I guess I
    should check the DC volts around the oscillator before doing this.
    In the end, the aim is to TX again on 630m QRP. Before the fault arose my measured ERP was just under 10mW. This regularly was spotted on WSPR in

    National Hamfest - virtual again

    Posted: 24 Sep 2021 06:19 AM PDT http://g3xbm-qrp.blogspot.com/2021/09/national-hamfest-virtual-again.html

    As Covid-19 is still having an impact, this large UK rally is being held virtually again.
    Like many boring old farts (BOFs), I am appalled by the spelling on the
    main page, which is seen by thousands. Does nobody check?
    See https://www.nationalhamfest.org.uk/ .

    OFCOM Commonweath Games Licences

    Posted: 24 Sep 2021 05:34 AM PDT http://g3xbm-qrp.blogspot.com/2021/09/ofcom-commonweath-games-licences.html

    OFCOM is issuing licences for communications at the Commonwealth Games in Birmingham next year. See the OFCOM website for more details.

    Pixies and the Micro-80

    Posted: 24 Sep 2021 05:32 AM PDT http://g3xbm-qrp.blogspot.com/2021/09/pixies-and-micro-80.html

    There has always been a call to see what can be worked with very little.
    Among such rigs are the Pixie and Micro-80. I have built both in the past.

    Both use the PA as the mixer on RX. The RX is the compromise although both work. Pixie kits were available as kits from China at very low cost. I
    bought one for 40m, with a crystal on 7.023MHz. If you get one you may want
    to consider crystals on 7.030MHz which is the QRP calling frequency in
    Europe. These crystals are available at low cost.
    See https://sites.google.com/view/g3xbm4/home/hf-mf-and-lf/homebrew/8040m-pixie-and-micro80-transceivers .

    10m FT8 QRP (Friday)

    Posted: 24 Sep 2021 01:54 PM PDT http://g3xbm-qrp.blogspot.com/2021/09/10m-ft8-qrp-friday_24.html

    Since 0800z, I have been on 10m FT8. As usual, I was on 2.5W TX for a few minutes, then RX only. It is now 0811z and no spots given or received yet.
    It is still very early.
    UPDATE 0835z: Just a spot of me on TX by G0FWX (160km).
    UPDATE 1300z: 11 stations spotted on RX with furthermost D60AC(8211km) on
    the Comoros Is in the Indian Ocean.
    UPDATE 2050z: Today is the best F2 propagation I have seen on 10m for some years. So far today, 88 stations spotted very many in South America.

    Yesterday on 10m FT8 RX

    Posted: 23 Sep 2021 11:42 PM PDT http://g3xbm-qrp.blogspot.com/2021/09/yesterday-on-10m-ft8-rx.html

    Yesterday was quite a good day on 10m FT8 RX. There were stations spotted
    on RX from Indonesia, Africa, South America and Europe. On the whole, there
    is less Es and more F2 DX.

    Shack in 2012

    Posted: 23 Sep 2021 11:15 PM PDT http://g3xbm-qrp.blogspot.com/2021/09/shack-in-2012.html

    One of my Facebook memories today was this photo of my shack in 2012. This
    was at the old QTH.

    Sunspots - Friday September 24th 2021

    Posted: 23 Sep 2021 11:12 PM PDT http://g3xbm-qrp.blogspot.com/2021/09/sunspots-friday-september-24th-2021.html

    Solar flux is 90 and the SSN 75. A=11 and K=3.

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