Thanks for the URL Jacek. That site should be an inspiration to all of us experimental ops! 73 es GL petefmt -- On Sat, 13/3/10, Jacek Lipkowski <[email protected]> wrote: From: Jacek Lipkowski
Getting a Marconi vertical up in the sky is no mean task when 100m long and carrying a decent antenna current so I was wondering whether there is any merit in using grounded electrode pairs (as used
Mike, Farnell stock the 13.25mm diameter version of 3C85 as part number 178504 at 14p each, but I expect these may be too small for yoru application. Didn't see any larger onese listed. 73s Roger G3X
A very good summary and analysis Paul - thank you. Further tests, with an ID, will be good, but the signal clearly got there and 858.7kms is a very long way for an amateur signal on 8.97kHz. Who's ne
Perhaps there will be some resonating problems but i do not expect them. I try to measure the antenna current and/or the voltage. The TX starting time is not exactly sure but perhaps arround 14 UTC.
Thank you Stefan. Good luck with the VLF experiments in the days ahead and I hope that Marcus and others manage to receive you signals. 73s Roger G3XBM -- http://g3xbm-qrp.blogspot.com/ http://www.g3
As with previousl experiments, the trials can be easier than the calculations. Alan -- On Tue, 16/3/10, Roger Lapthorn <[email protected]> wrote: -- http://g3xbm-qrp.blogspot.com/ http://www.g
Anyway this is a new record on 9 kHz:-) Congadulations! Remember, this is well out of near reactive zone. Thus field decreases as 1/D and if you increase voltage to 20 kV then distance will be 20:1.
My house backs onto a main road, and there is a drainage ditch running behide trees and foliage running for about 70m in one direction that would have made a useful route to hide a wire in. Might
Although I enjoy this group it would be much better if it was a Yahoo Group. Why? Messages can be read on-line if preferred and it is not necessary to download messages to a mail programme. Files cou
Dear LF, on two evenings this week, I have transmitted an 8.97 kHz signal from my LF Marconi at home, and attempted to receive it at various locations. The experiment was very similar to the one i
Has anyone yet tried a ground loop at 9kHz? That was going to be my first (and probably only) antenna type, running a length of wire as far away from the house as I could get-away with and connec
Jim, Thanks for the updated preamp schematic. What would you recommend as a suitable alternative to the ZTX690B device in your 8.97kHz preamp as I don't think these are available nowadays? All, Thank
This is amazing stuff and congratulations to all concerned. When the tests are finished, please can we have a summary of the details here i.e. distances, power, antennas used etc? 73s Roger G3XBM On
If I've asked this before please forgive me.... With all the discussion recently on how to radiate a signal on sub-9kHz I'm left wondrering how far, practically, one could expect to get simply with s
If I get time and a NOV for 9 kcs my proposed approach for TX would be an IC 706 on 900 kcs divided by 100/driver chip TC 4427 and a couple of FETS class D for an output of a few hundred watts, desi
Probably an inv L or T antenna as high as possible for TX is the best solution for 9 kcs. Base load the antenna with the necessary inductance for resonance and if necessary add another small induct
What distance is this? 73s Roger G3XBM On 15 March 2010 15:30, Paul Nicholson <[email protected]> wrote: Stefan coming through on Markus' spectrogram:- http://www.mydarc.de/df6nm/vlf/vlfgrabber.ht
Has Dreamer 9 fizzled out, have not noticed a big uptake. mal/g3kev -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088
