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Date: Mon, 14 Mar 2016 21:52:02 +0100
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Subject: Re: LF: EbNaut from Todmorden
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Status: O

Hi Paul,

Am 14.03.2016 20:34, schrieb Paul Nicholson:
> A nice result from Heidelberg and you did a full phase search
> in 15 degree steps!
Yes, it was interesting to see the phase change in smaller steps.

> Before taking down the antenna I'd
> like to see how well the long wire works for ELF reception.
Interesting. Tell us about the results.
I wish to have such a playing field, for such long antennas. I would 
even build a 10 km long wire antenna if i could.
But i have other playing fields these days.

> It might be possible to put up a more permanent antenna, 100m
> long at 6m height might be feasible.  Less ERP but at least
> it can be calculated and calibrated and it could stand a much
> higher voltage.
Not necessarily.The efficiency could be the same or even better although 
the wire is in the same height above ground. It all depends on your 
ground system.
100m is a nice length which provides enough C to keep the voltages low. 
If you have 6m instead of 4m height, you may get a 3 dB improvement.

> Would be interesting to try VLF transmission but I'd have to
> apply for a Notice of Variation.   The difficulty there is
> that for the NoV I have to plan things in advance and estimate
> ERP and so on, and have a particular purpose for it.   This is
> probably one of the reasons there's been no UK VLF transmissions
> for some time.  It's a lot of work and cost to gear up for VLF tx
> only for the limited period of the NoV.   Nevertheless, I found
> myself thinking about the costs and merits of kites and balloons.
> There is, after all, the east-to-west T/A which hasn't been
> done yet.
Paul, what about a meeting in the UK? We could do a kite experiment 
together :-) Maybe some more OMs will join :-)
You seem to have enough space and i guess there is wind sometimes in 
your location? :-)


73, Stefan