Roger G3XBM's (Mainly) Amateur Radio Blog

Simple QRP projects, 10m, 8m, 6m, 4m, FT8, 160m, WSPR, LF/MF, sub-9kHz, nanowaves and other random stuff, some not related to amateur radio.

6 Jan 2013

Earth electrode TX/RX antenna at 472kHz

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Signals received on 472kHz WSPR using the earth electrode "antenna" This afternoon I've been experimenting with my 20m spa...
2 comments:
5 Jan 2013

Half century reached on 472kHz with 10mW ERP

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After less than a week on the 472kHz band, I see that my tiny QRP signal has now been copied by 50 unique reporters in 8 countries so far wi...

First JT9-1 QSO on 472kHz

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This afternoon I had my first digital 2-way QSO on the new 472kHz band using JT9-1 mode created by K1JT. The contact was with G3ZJO in IO92...
4 comments:
4 Jan 2013

Chinese all-mode, all band handheld for under £300

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The Yintong HVU1 is an all-mode, all band 1.8-1296MHz handheld designed as a real competitor to the FT817, KX3 and Ten-tec Argonaut VI and ...
7 comments:
3 Jan 2013

First CW QSO on 472kHz

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Although my local noise level is a little lower on 472kHz than on 500kHz it is still not low, so working stations with the current TX antenn...
1 Jan 2013

Hello 472kHz!

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Today I did my first proper transmissions on 472-479kHz, although I did operate for a few hours before Christmas when there was some confusi...
31 Dec 2012

Goodbye 500kHz - it was good to know you.

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This evening the 500kHz band is being withdrawn from UK amateurs at midnight, as it is in most other countries too, to be replaced by the 47...
3 comments:
28 Dec 2012

Recording the last hours on 500kHz?

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Back in the late 1940s G5UM and others recorded the last few hours of operation on the old 56MHz (5m) band on an old 78rpm disc. Sadly this...

472kHz (quiet) RX preamp

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When the grandchildren and family have all gone home next week, my first project will be to improve the RX antenna system for 472-479kHz rec...
26 Dec 2012

Last days on 500kHz

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With just a few days left before the 500kHz permits are withdrawn for ever I've been doing a last gasp bit of WSPR beaconing. It is not ...
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Roger G3XBM
Burwell, Cambridge, United Kingdom
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