I fully agree with Walters opinion! You have a very good station and do a good job in activating the band! We all profite of the active stations. If there would be no activity, nobody would start to
Jim, mni tnx for the QSO! Your signal is the strongest i've ever got from the UK! And tnx that it was a reals QSO, not just rapport and 73... :-) hpe cuagn next weekends agn... 73, Stefan/DK7FC _____
Hey Andy! Congrats to that good work! What is your receiving antenna for DCF77? In the web i have found that page: http://www.ptb.de/de/org/4/44/442/index.htm#Kontakt There you can find the adress of
Please, could someone send a test signal (such as CQ...) in QRSS/DFCW on 137.7? I built up the active E-field antenna at the new qth in Heidelberg (city) and want to try the performance. It is just 2
Dear LF group, Tomorrow, the wind forecast is excellent! See http://www.windfinder.com/forecast/frankfurt It is almost to much wind but i have the new kite braid with a strenght of 500kg... So the an
Hello Jim, Andy, Sam, Ken, Group ;-) Excellent comments! Thank you for these explanations. I see, it is your business. And what i read tells me, that the optic way cannot be the wrong in principle. R
Hi Gerhard, Thank you! I haven't known that. The sensitivity of the SFH350V is maximal at 850nm. But at 650nm it is still 57% and thus also usable. But if one wants to get "the perfect system" this m
Which commercial VLF transmitters can actually be received in the 10kHz range? There is much listed in the web but in times where these transmitters are shut down all this may be already old stuff. W
Hi Alan, Well, i expect the oxide film losses of the foil should be neglectible, compared to the ground losses. And one has the advantege to reach a high C that is easy to adjust/modify and cheep and
Hi Horst, Interesting VLF tests! And Alans hint is a good i think. Does one need a special licence for that band in germany? I am almost sure about that ;-) What are the limitations of that licence?
Hi Roelof, LF, Roelof, why do you think that this is the case? Interesting Question! "Won't work" means "Won't work properly" it assume. There will be a signal but perhaps it is not optimal. And why
Pete, Try to ground your inv L at the end, e.g. with aluminium foil out of the household, say 5m*0,3m. The impedance will drop since the C will rise. Thus, the needed L and the voltage will decrease!
So, the coil losses decrease with it's L (assuming a given wire diameter, coil diameter and spacing and so on) and thus it is good to decrease the needed L. So we have to spend a high coupling capac
Tnx Jay, Uwe, Jean-Louis, group, Jay, that sounds to be a good RX concept. You do not have a band pass filter in the preamp? What about the 50Hz or 60Hz ;-) lines and the levels they generate at your
Here i agree. And here i understand "dreamers" in a positive and optimistic way, just like children are dreamers! We have written so many mails (including me, of course ;-) ) und could start now just
Rik, Alan, I think we think about the same: using the inv-L as a vertical loop by using the ground. Wouldn't it be easier to use a aluminium foil to get proper C (to ground), especially when talking
Hello Horst, That sounds really nice. If it would be easy to find some motivated OMs in the near field (31km) ;-), that would be an interesting field to test. Yesterday i have thought about possible
