Hello group !
Among others, I'm experimenting on VLF.
Today, I applied about 70W on my 16m high Marconi. The loading coil is a
Variometer (460-580mH) and the capacitive load of the antenna is about
600pf. The antenna current was measured at about 300mA.
1. The coil is whistling but also the wires running across my property
do. I could hear the high tone even in abt. 70m away from my place. This
could cause problems with my neighbours, I guess.
2. You know Christmas time is coming and so I set up different lights
for decoration today. One is a light-chain consisting of about 80 LED's
in a small tree, right in the middle of my garden. When it got dark, the
LED's were enlighten even without any power supply connected. So this is
the proof: The antenna is radiating!!!
3. Cats: I thought the cats won't show up as long as the TX is on,
because of the loud whistling tone but they completely ignored the noise
and didn't behave any different!! It is said that a cats ear is at least
twice sensitive compared to a human ear and I have no doubt that they
can hear very well up to higher frequencies. So I assumed this tone must
be extremely annoying to them, because it is almost to me. So either
they are deaf or dumb? Or what?
to be continued
73
OE3GHB
Gerhard
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