"Ian White wrote
please tell us more about the fan of 1.0m radials, on the ground,
that will give ninety-several percent feedpoint efficiency.

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Ian, you must have had no experience of a few short radials.

Try 16 or 32 radials, 1 or 2 metres long, in good soil, with a 1/4 or
3/8-wave vertical or inverted-L antenna. Radiating and receiving
efficiency will surprise you. Also at all higher frequencies.

At your new QTH you may not find much good soil. But try it anyway.
Or persuade someone else to try it.

I managed for many years with 7 radials 2 metres long, covering an
angle of only 90 degrees. Soil resistivity was only 70 ohm-metres.
Unfortunately, had to abandon it when the garden was turned into a
patio. Damned concrete!
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Reg.