Hello group!
Thanks to Alan, Markus and Laurence for the answers:
Markus stated it could be an "inverted field-mill" effect:
As far as I can imagine, then the wire itself is vibrating, thus the
sound is produced.
Alan thought about Corona-effects. I don't have experience with
Corona-discharges and don't know if they must be visible in any way. I
didn't really look out for them yesterday.
Laurence told about metal objects near the antenna where the vibration
is induced. In my case such an object could be the 60m long metal-wire
fence on the right side of my property.
I think all of those options are possible and I will try to find out
more on each.
73 es tnx
OE3GHB
Gerhard
Am Samstag, den 20.11.2010, 19:13 -0900 schrieb Laurence KL7UK:
> I was fortunate to be working in Antarctica for a number of
> years and visted Siple station just after they reopened the base in
> 1978 (closed for a prior season or so due to a Hepatitis
> outbreak... who says there are no germs in Antarctica!)
>
> I was having breakfast there having just flown in as co-pilot
> (point it that way Laurence....) from our refuelling stop at 80
> degS after dropping off some glaciologists on the Rutford Ice stream
> near the Vinson Massif
>
> The new replace VLF Jupiter transmitter was running a series of
> stepped 2-4Khz (im guessing here but my hearing was a lot better
> then) tones every few seconds. What I vividly remember was the cutlery
> and anything with a metal overlap vibrating at the Tx freq...pretty
> interesting really. The cook said "you get used to it but the $^%$#
> tones are annoying given the repitition...." (dah de dahhh da de
> dahhh etc)
>
> Given the TX had an RF power of (stated) 150Kw perhaps its not
> surprising everything was being excited. Im sure it wasnt running at
> that power that day as the lights werent dimming that much - Nice
> breakfast in any case chomping on my psuedo real bacon and canned
> powered eggs.
>
> http://www-star.stanford.edu/~vlf/Antarctica/Siple/index.htm
>
> Laurence KL7UK in Dallas this evening...
>
> > From: [email protected]
> > To: [email protected]
> > Date: Sat, 20 Nov 2010 17:26:41 +0100
> > Subject: VLF: Funny things!
> >
> > 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
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