Dennis and Dave Evidence so far: 1. Experiments in loading 50 foot (15m) evergreen fir tree for operation on 3.7MHz. 1.5metre diameter tuned loop and novel (G3LHZ) tuned coiled hairpin tried as tree
Dennis (DL6NVC) Please could you try your loop away from the tree. Preferably more than 2 metres. I have found severe bio-electric(?) noise from trees from 3.5 to 500MHz.using loops, whips and UHF Ya
Andy If or when all else has failed why not try the (my?) "two identical antenna method"? Set up a pair of two identical short whips about 30 to 50m apart on reasonably uniform ground. they should be
Stefan As a long time 'lurker' on this LF group I am particularly interested in what orientation you plan for your low height 630m band dipole antenna and what azimuthal radiation pattern you find. A
Hello Stefan, and thanks for interesting reply. But a few more comments before I go back to lurking. As yet I am not signed up to lurk also on the yahoo reflector. Perhaps I will when a bit less busy
The legal phrase to use is "I find that I do not have any record of your way-leave for these lines". It works! I got wires and a telephone pole moved for no charge on this basis Mike - G3LHZ neighbou
By the way I also got an electricity pole supplying my neighbours removed from my garden (previous QTH) at the same time as the telephone wires, using the same legal clause. The neighbours' telephone
Dear Andy, Jim, LF Group, My strong support for what Jim has said. The immediate environment always affects all field measurements, not just magnetic field measurements. Marcus’s formula is co
Dear Markus (and LF Group) Thank you very much for your very useful comments. I have a few further comments. (a) On item 3. below: It is useful to note that reflection at the walls of a waveguide
Dear Alan/Mike/Group I think that reception with multiple antennas is a very interesting suggestion/proposal. Here are some 'bookwork' theoretical points which could be taken into consideration? Opti
Uwe, I would be very interested in a plot of how the conductivity has varied over the year and in what the largest variation of maximum to minimum that you have found? It would also be useful to mea
Dear Group I was at PTB Braunschweig yesterday and saw the atomic clocks for the DCF77 time signal on 77kHz. Juergen Becker on email [email protected] , an engineer responsible for time dissemina
Andy A correction: I should have said in series with and not across. So that my post should read: For a second zero on the HF side try an inductor in series with the zero capacitor. The trouble is th
Andy For a second zero on the HF side try an inductor across the zero capacitor. The trouble is that it will have to have the same reactance as this 1.5p capacitor and that may not be easily realisab
