Hi all, Occasionally came across following off-air periods during a former long term measurment on DBF39: Dec 05/1998 02:06 - 02:18 UTC Dec 08/1998 13:15 - 13:31 UTC BTW: Is there anybody capable of
Hello Dick, PA0SE and all DR> So even if you were able to decode the Yes and No. By vewing the demodulated audio in SSB mode on the scope, I can discern different message lengths, short messages and
Dear all, In my new QTH (as well as old QTH) I fight against man-made-noise limiting the receiveable LF stations. The one and only station I ever heard is/was DA0LF and DA0LF/p in May/June 1998. Satu
Hello all despite "high" local noise managed to copy: May 09/1999 08:58 UTC 137.1?? heared "CQ DE DJ1RL" BW=200Hz S(DJ1RL)=? 14:28 UTC 137.1?? heared "CQ DE DJ1RL" BW=200Hz S(DJ1RL)=? S(137.4 carr)=-
Hi all, it's now 12 months ago I started collecting stations on frequencies below 153 kHz and put them into a list. Here is an update which can be merged into former distributed list. May 07/1999 21:
Hello John, G4GVC please find enclosed some more comments on your EMI problem. Sorry for the "long message". Collecting "ideas" is one way to work your problem out. With such a check list you could c
Hello All Recently I purchased a tuned passive magnetic antenna for receiption of utility stations in the 70-150 kHz range. Initial messurements on it showed, that sensitivity was only slightly lower
Hello all recently I asked some coil winding questions. Now I am able to answer them to some extend by myself: One solution would be to use single layer solenoid instead of multiple layered ones. Thi
Hello Petr, OH1FIG, Petr> I made "loading coil" on diameter 80mm, length of coil about 100mm. This is probably the main cause for the phenomenon you experienced. By putting two inductors in series, w
Hello all, here some equations which I found in my book regarding capacity of wires above a ground plane. vertical wire of diameter d[m] and length l[m] lower end being h[m] above ground Cv[pF]=55.6*
Hello all, here some equations I found in my book regarding radiation resistance of dipoles and monopoles: the original equation based on current profile on dipole/monopole, all other published equat
Hello all, does anyone of you have experience with EZNEC modelling software? As far as I know, this is the only software (except for the original but cumbersome NEC) capable of modelling the ground i
Hello all, just retreived some technical data from german LF-BC-station in Donebach broadcasting the program of Deutschlandfunk (alias Deutschlandradio Koeln). Perhaps the values listed here are bene
Hello all, on my search about LF stations found the following: == == http://www.boulder.nist.gov/timefreq/wwvstatus.htm == == -- NIST Radio Station WWVB -- NIST Radio station WWVB is located on the W
Hello all While compiling an article about the german LW-BC transmitter site "Donebach", I come acros some interesting facts about the first antenna system which was in use there from 1967 through 19
Hello LF enthusuasts, The german "Regulatory Authority for Telecommunications and Posts" recently published a questionary to evaluate the market's needs for low frequency allocations. Details (these
Dear Petr, PM> Could anybody recommend a free utility for Hmm - sorry I am not aware of such a specialized tool - but... that's the way I do it, alternatively: Perhaps you own a HF propagation predic
Hello all, Radio Regulation terms "Primary", "Permitted" and "Secondary" In Radio Regulations (RR) Section IV, single frequencies or bands of frequencies are allocated to one or more services (alias
