MF,
As i arrived on the hill, a essential thing was missed: The antenna!
Someone has carefully removed the complete construction, just a piece of
a few meters remained in a tree.
A pity :-(
That must have been forest workers or so. It was to be expected that
this will happen but i didn't expect that the complete construction will
be taken.
Don't know when this happened, i didn't use the earth antenna for a long
time.
Now i have just 1100m of that wire left, at home.
I think i won't build a new earth antenna, not at all at this location
;-) But i will try a MF dipole in some time.
Thinking back what was done with this antenna, Michael Oexner received
me in 45km distance on 8970 Hz in DFCW-600. Also F5WK and others
reported to see me in QRSS-3 on 137 kHz. It was an interesting project
and worth the effort, even for that short time.
73, Stefan/DK7FC
Am 30.06.2012 14:41, schrieb Stefan Schäfer:
MF,
Another thing. Right now it is 32 °C here. Best place it to stay on
the beach or on the top of a hill in the forest. Today i choose the
forest.
Accidentally there is my 700m (ish) long earth antenna which has an
average height above ground of 8m. Today i want to use it as a dipole
for the 630m band. The feed point is somewhere in the middle but not
exactly known.
What will the efficiency and radiation pattern be? Is it a dipole or
what? EZNEC says it will have 10 Ohm Z=R at resonance (Cu losses +
"typical" ground losses).
The WX forcast says there will be much QRN in the evening, anyway.
Maybe someone can listen from time to time on 476.5 kHz? I will listen
on the band (+ 500 kHz +-) too and maybe a QSO is possible. Who knows...
If the antenna behaves as a dipole it should radiate E/W, so good
chances for UK, PA and DF6NM, DJ2LF...
I'll start now and may be "QRV" in 2 hours or so.
Here, the first time my PA will operate in /p. Nice that it is smaller
than a VHS video cassette and allows to generate QRP at high efficiency!
73, CU, Stefan/DK7FC
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