Hi Roger,
Congrats to the interesting results. I bet many of us have thought that
the signals will be significantly lower when then system runs on
batteries. However keep in mind the QSB and changing propagation which
may influence your results. Best may be to do the tests in daytime and
in a range below 200 km or so.
The results remember me on my full size dipole experiments in July last
year. Everybody expected the the signals must be down in the noise but
later i had several QSOs in normal CW, with a /p equipment...
73, Stefan/DK7FC
Am 07.01.2013 18:36, schrieb Roger Lapthorn:
Just fed everything from a 12V battery (no mains grounds) and result unchanged.
It STILL works.
Now QRT until late this evening as my Internet signal in the rear study where
set up temporarily is too weak to reliably sync time without all the doors
open! After about 10.30 I'll try again when we go to bed and leave all internal
doors open, HI.
Fascinating results.
73s
Roger G3XBM
On 7 Jan 2013, at 16:57, g3zjo<[email protected]> wrote:
Yes still a good signal.
I take it there is no Earth connection via the TX chassis - PSU route either.
You know I am pretty sure that round here I would get dreadful hum from 2 earth
stakes.
When I was the other side of town and much younger I melted the innards of my
AVO Multiminor measuring between two earths. Also I ran a 6 Volt fan and
charged batteries via a diode between Neutral and an earth spike. The fan would
go so fast on a Sunday morning (electric cookers) that it would take off.
Eddie
On 07/01/2013 16:36, Roger Lapthorn wrote:
Since 1608gmt I have been WSPRing with an even shorter earth electrode
"antenna" ( baseline about 15m) with BOTH ends connected to ground rods in the
soil. Max connecting wire height still 1.5m. Yesterday I used the house pipes as one
ground.
Initial tests suggest reports are almost identical, suggesting the true " loop in
the ground" hypothesis rather than propagation aided in any way by pipes. This is
NOT the case at VLF.
Most fascinating that this tiny "non antenna" works at all.
73s
Roger G3XBM
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