Dear LF group, 
 
Thank you very much for your participation on my todays experiment!! Congrats 
to all receiving stations! Very well done since my signal was rather weak 
today:-)
There are coming up more and more stations who seem to be very well RX 
equipped, even on such low frequencies AND such weak signals. :-)
 
Thanks Paul for the web site with the grabber compilation! This is very nice to 
watch and challenging for me to generate some readable letters there! 
Caselle(>1400km) should be a realistic goal in the next weeks, with more ERP...
 
Also tnx for the resonance here on the reflector! This is an important part to 
keep the VLF interest alive, including my interest (since there are no QSOs yet 
;-) ).
 
I was sad that some problems occurred yesterday. Normally each experiment has 
to be better than the last ;-) but the 600W PA isn't finished yet due to some 
problems with the FETs. So i had to use the "old" PA. Today the resonances 
between generator and SMPS were nerving and occurred almost the whole time. So 
i even had to make QRP, just about 200W (average). So i am happy that someone 
received my signal at all. And there are many stations, i didn't expect that, 
so the sadness is gone ;-)
 
It took a long time to check for optimal power output due to the generator 
resonance. Thus i transmitted a long dash on 8970,0 with some breaks within the 
transmission. Later, the first rain occurred, like reported by Markus (TNX !). 
After a while the rain was gone and the coil dry (due to the wind it gets dry 
relatively quickly), then i started to transmit "VLF" in DFCW-600, that was the 
idea for today but i had to stop after some minutes due to upcoming rain. This 
goes on and on and so i decieded to bring the experiment to an end after some 
hours.
But never mind. If we look back to the last experiments, they were very 
successful. Today even new stations received the signal. 
I run a copper tube into the earth, about 1m long, with a wire soldered on the 
top, to connect a radial cable. But it couldn't check the decrease of the earth 
losses due to the rain. So maybe next time i will reach more antenna current 
with the same power.
The next activity will be done with the new PA since the speed oscillation of 
the generator is not a good way to operate this system...
 
The next time i will prepare the experiment better, not working until 0 UTC and 
so on ;-) Also the PA (almost finished) and new system parts should not be 
finished in the night before operation...
 
So, cu in the next experiment and agn tnx for your participation!
 
73, Stefan/DK7FC
 

________________________________

Von: [email protected] im Auftrag von Paul Nicholson
Gesendet: Sa 03.04.2010 13:05
An: [email protected]
Betreff: Re: R: VLF: 4th VLF experiment by DK7FC/p




Transmission has begun.

Revised list of live displays,
(E/H field and distance to DK7FC/P),

Warsaw (E 902km):
  http://acid.ch.pw.edu.pl/~sq5bpf/grabber/

Nuernberg (E 179km):
  http://www.mydarc.de/df6nm/vlf/vlfgrabber.htm

Cumiana (E 544km) scroll down to system 5:
  http://www.vlf.it/livedata.html

Pontese Dew (E/H 487km) scroll down to observatory data 4:
  http://www.webalice.it/rromero/pnts_observatory.htm

Todmorden (H 859km):
  http://abelian.org/nb.shtml

Cumiana (E 544km), Caselle (H 1436km), Cape Coral (E 7832km),
Sebring (E 7720km), Bielefeld (E 264km),
and Todmorden (E 859km):
  http://abelian.org/nc.html

--
Paul Nicholson
--

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