Message-ID: <005d01caa11d$55a87f70$8cd9160a@EFREMOV>
From: "rn3agc" <rn3agc@mail.ru>
To: <rsgb_lf_group@blacksheep.org>
References: <BDEMKFCNLMIILGIFNONNGEGGDHAA.victor13@online.nl> <003601caa02d$36395560$8cd9160a@EFREMOV> <38A51B74B884D74083D7950AD0DD85E82A1AB3@File-Server-HST.hst.e-technik.tu-darmstadt.de>
Date: Fri, 29 Jan 2010 22:57:35 +0300
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Subject: Re: LF: QRP-beacon AGC
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Hello Stefan,

Idea excellent! But to make it is unreal. I do not have possibility to do any changes in the aerial. If suddenly with the aerial
something happens also it will break, I will make the new aerial a double wire. And fortunately, the aerial becomes covered by ice
infrequently. By the way, the ice layer this time was absolutely small. There were cases that the wire became covered by ice till
the thickness of 12 mm :)
Thanks!

73 Andrey


Hi Andrey,

Perhaps it is an idea to use 2 wires in parallel as the antenna wire. If you connect the two wires together at the end, you have
the possibility to fed a DC current to the wire to melt the ice. A few Volt and a few Ampere should be enough, so not much power
waste. It could be fed by a standard AC-decoupling network or can be injected during the TX breaks of your beacon by a relay (or
it can be done by hand from time to time ;-) ). So you could avoid the crash of your wire...

What do you think? ;-)

73, Stefan/DK7FC


________________________________

Von: owner-rsgb_lf_group@blacksheep.org im Auftrag von rn3agc
Gesendet: Do 28.01.2010 16:18
An: rsgb_lf_group@blacksheep.org
Betreff: Re: LF: QRP-beacon AGC



Thanks, Victor!
Experiment will not completely successful. At night, the antenna was covered with ice,
the resonance shifted to 600 Hz. I discovered it at about 03 z and turned off the transmitter.
Yet the beginning of the transfer could be seen on the grabber DF6NM.

73 Andrey

> Hello Andrey,
>
> just traces of your signal,
>
> 73
> Victor
>  -----Oorspronkelijk bericht-----
>  Van: owner-rsgb_lf_group@blacksheep.org
> [mailto:owner-rsgb_lf_group@blacksheep.org]Namens rn3agc
>  Verzonden: woensdag 27 januari 2010 16:29
>  Aan: rsgb_lf_group@blacksheep.org
>  Onderwerp: Re: LF: QRP-beacon AGC (+ new announcement)
>
>
>  Hello Nicolas, Markus, Victor, LF,
>
>  Many thanks for the reports!
>  I am very surprised such good results. Now I will try to further reduce
> power.
>  Start the beacon today at 19 z. 137775.5, dfcw90.
>  Power 5 W.
>  Who will have the opportunity, please watch for the beacon.
>
>  Thanks!
>
>
>  73 Andrey
>