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Date: Wed, 05 Sep 2018 09:30:20 +0200
From: DK7FC <selberdenken@posteo.de>
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Subject: Re: ULF: Carrier on 2970.005 Hz
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GM Genosse Roman,

Well, in 2010/2011 i used a generator for the kite experiments. And 
meanwhile there are modern batteries available, the LiFePo4 technique.

The generator is loud, it smells, it is inefficient, it does not handle 
dynamic power changes (when doing CW :-) ). Beeing loud is the strongest 
argument here. I am transmitting in a forest, near a street where many 
sportive peolpe riding their bicycle. It is always better not to cause 
to much sensation! And the battery is totally silent. During the week i 
can charge it with solar power! It is clean and silent.
The new battery contains about 1.5 kWh and can supply a 1 kW PA if i 
want. It's weight is about 17 kg and it is quite compact and has a built 
in display which shows me the remaining capacity in % and in Ah, it 
shows the voltage, current and power. This is very comfortable. I'm 
fascinated by the technique.

I am quite sure that there will be a 'battery revolution' in the next 5 
years. Together with solar modules it will be possible to store enough 
energy needed for the year so can will not depend on external companies 
dictating the price for electric energy. The prices are rising and 
rising here in DL. They want 0.3 EUR for 1 kWh meanwhile. If you can 
produce your own energy, clean and silent, then you can say to them "Do 
what you want, rise the prices each year, but at some point you will 
need to find people who are willing to pay it!" So story of its own.....

73, Stefan

Am 04.09.2018 23:33, schrieb Roman:
> TNX for info, Genosse Stefan! -)
>
> Why you use battaries for TX, not a compact motor-generator?
>    
>