Re: LF: LF-Sweep 136.5 to 141.5

[Markus Vester <markusvester@aol.com>]

Hi Geri,

 

not sure if that was really their big TX, looked more like a network analyzer to me. Unfortunately I haven't actually read off the fieldstrength last night, but from the brightness and the noiseblanking artifacts in the screenshots I'm sure they were radiating no more than a couple of watts. For impedance measurements on a big antenna, such power is probably needed to overcome received power from distant LF transmitters, which can easily be a watt or more.

 

Best 73,

Markus (DF6NM)

 

-----Ursprüngliche Mitteilung-----
Von: Holger 'Geri' DK8KW DI2BO W1KW geri@dk8kw.de
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Di, 9 Okt 2012 2:11 pm
Betreff: Re: LF: LF-Sweep 136.5 to 141.5

Andrey, 

 

So obviously they used their main transmitter, perhaps with some reduced power,  

to do the antenna alignment.  

 

I haven't actually seen the transmitter in  Burg but I had the opportunity to  

see the main DCF77 transmitter, and what I saw pretty much reminded me of my own  

LF/MF station. No special technical solutions, just a big PA, an antenna current  

meter and a big variometer - that's all ... 

 

Vy 73 

 

Geri, now: OK/DK8KW 

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