[G3XBM] Flower pot antenna

[G3XBM via rec.radio.amateur.moderated Admin]

Roger G3XBM's (Mainly) Amateur Radio Blog

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Flower pot antenna

Posted: 06 Mar 2021 04:03 AM PST
http://g3xbm-qrp.blogspot.com/2021/03/flower-pot-antenna.html


Steve G1KQH recently sent me an email with some useful links on how to make
1/2 wave verticals. I am sharing it with you in case this gives you
ideas."The latest G4NSJ video pointed me to investigate..
Cheap to make for anything from 28MHz to UHF I guess.. Ideally a starting
point is to make one for 2m
Gain 1dB over 1/4 Wave
Details here:
http://vk2zoi.com/articles/half-wave-flower-pot/
You can even make it Dual
band:http://vk2zoi.com/articles/dual-band-half-wave-flower-pot/
There is even an online calculator:
https://nomonsuhendar.blogspot.com/2020/12/flower-pot-antenna-calculator.html
73's G1KQH"

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17m FT8 QRP (Saturday)

Posted: 06 Mar 2021 10:19 AM PST
http://g3xbm-qrp.blogspot.com/2021/03/17m-ft8-qrp-saturday.html


At about 1130z, I went on 17m FT8 with 2.5W and the tiny indoor loop. It is
now 1141z and 3 stations spotted on RX with the furthermost EA8WU (2985km)
and nobody has spotted my QRP on TX.
UPDATE 1145z: So far, 4 stations spotted on 17m FT8 RX.
UPDATE 1259z: 15 stations spotted so far on RX. Nobody has spotted me on TX.
UPDATE 1400z: 2 stations have spotted me on TX and 37 stations spotted on
RX.
UPDATE 1555z: 4 stations have spotted my QRP TX and 65 stations spotted on
RX with the furthermost YB1AR (11781km).
UPDATE 1820z: 72 stations spotted today on 17m FT8 RX today. QRT soon.

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630m WSPR TX 4 years ago

Posted: 06 Mar 2021 02:20 AM PST
http://g3xbm-qrp.blogspot.com/2021/03/630m-wspr-4-years-ago.html



The table shows the stations spotting my 10mW ERP from the
earth-electrode "antenna" in the ground in 2017. At the moment my
transverter is faulty on TX, so I am restricted to RX.


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The tiny indoor loop

Posted: 05 Mar 2021 11:14 PM PST
http://g3xbm-qrp.blogspot.com/2021/03/the-tiny-indoor-loop.html


This is the inside of my loop antenna used successfully on 20m FT8 to 10m
FT8. I am amazed how well it works.
The wire used for the loop is quite small and I might try much thicker
wire. Tuning should be sharper, but efficiency should be higher. My concern
is higher Q means higher voltage at the high impedance point.


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Sunspots - Saturday March 6th 2021

Posted: 06 Mar 2021 10:22 AM PST
http://g3xbm-qrp.blogspot.com/2021/03/sunspots-saturday-march-6th-2021.html


Solar flux is 73 and the SSN 14. A=5 and K=1.