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Re: LF: VLF - G3XIZ

from [Stefan Schäfer] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: VLF - G3XIZ
From: Stefan Schäfer <[email protected]>
Date: Fri, 31 Dec 2010 13:12:07 +0100
In-reply-to: <[email protected]>
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Chris,

This sounds good. Trying in 600 is a good starting point and a 50m vertical is fine too. How big are the balloons? Do you use helium or hydrogen? ;-)
Using 0.2mm diameter wire may cause some partial discharges ("sparking"). This is causing resistive losses and lower the ERP. Thus it is better to use a bigger wire, maybe 0,5mm. But then the weight could become a problem. Anyway, its sound like the best system you run on VLF so far.
When running 0.15 A into a 50m vertical at 8970 Hz you should get about 9 kV rms.

Sadly i am not near my grabber PC in Heidelberg and cannot move the window to your frequency but before there will be a reception in Germany there will be a reception in UK at farer distances what will be satisfying for you i assume ;-) Just like in my tests your personal ODX should rise in "small" steps since this is causing the most fun :-)

73 and good luck!

Stefan/DK7FC

Am 31.12.2010 12:38, schrieb Chris Osborn:
The balloons are still holding up.

I'm transmitting 'XIZ' at QRSS600
QRG: 8.971 846 kHz
The aerial current is down for some reason although the system's resonant.

73
Chris G3XIZ

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