Mike G3XDV, mentioned using DCF39 as a standard signal for comparing aerial performance, in a previous exchange which culminated in the fascinating article and results reported by Dick PA0SE. This h
To All from PA0SE With Vaino, OH2LX, I have exchanged several e-mail messages on the subject of measuring field strength. Vaino has many years of experience in that field and I thought subscribers to
From PA0SE I am probably the closest amateur-LF station to DCF39, so my measurment is not relevant. I receive it here constantly -33 dBm(75) with my new "Umbrella-Type Antenna", about 120 km away fro
From PA0SE 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 t
To All from PA0SE For the second time I have been measuring signals received here. The substitution method was used again: the output from the receiver is fed to a 35 Hz wide audio bandpass filter an
From PA0SE Alan Melia wrote: . Fascinating measurements Dick, I must go back and read those again. Though I really wonder what use standards are when the noise is S5.....I suppose these were formulat
From PA0SE At my QTH noise is rather low, with the 'big' TX-antenna that is located about 30m from the house. Few weeks ago I tested a small loopantenna indoor and noise was awfull. The 1 meter loop
From PA0SE to All When last year I had completed my LF-station I measured the total series resistance of the aerial/earth-system at 61 ohm, using a Wayne Kerr Radio Frequency Bridge type B601. The va
From PA0SE to All Hi all, I dug out a copy of an article by Nathan Sokal (Pres. of Design Automation) that was published in Design Electronics on 20 Sept 1977 titled "Class E can boost efficiency". T
To All from PA0SE Some time ago you received via the reflector the following correspondence between PA0SE and W7EL. Dick, Only the professional versions of EZNEC (EZNEC-M and EZNEC/4) directly report
To All As requested by Jean-Jacques Delcourt, ON5PG, via Rik, ON7YD, I have measured the signal strength of GBR at about 16 kHz. For comparison purposes I did the same on DCF139 at 138.38 kHz. During
To All Worked DF2BC/P at Campen Lighthoudse near Emden this morning with a formidable signal, RST 599 both ways. I would like to QSL direct but do not have the postal address of DF2BC. Can anyone pro
To All Johan Bodin wrote to me as an answer to my question when the Alexanderson VLF alternator-transmitter SAQ at Grimeton in Sweden will be on the air the following: I actually know some of the peo
Dear Christer, In the Dutch Magazine "Radio-Nieuws"of 1 April 1925 I found a treatment of the multiple tuned antenna by Ir. (later Prof.) Huijdts. It confirms what Rik, ON7YD, expected: In a multiple
To All, In addition to what Michael Sanders has written I can inform you that KPN (formerly PTT) is already taking away the transmitters at Kootwijk, now that the station has been closed as per 31 De
To All, John, G4GVC, used to run a net for LF-amateurs on Sundays, starting at 2100 hrs. UK time, on 1875 kHz SSB. Unfortunately John's work prevented him to do this any longer. Luckily Dave, G3YXM,
I agree with Dick and Alan that it would be good to have an 80m net again. The questions are; when and where? For my pennyworth, I suggest mid Sunday evening and somewhere low in the 80m band, 3646
Did anyone else hear OZ1KMR and OK1FIG working this afternoon (Saturday)? I just heard the end of OZ1KMR's over and he was signing off, did they make a QSO? No sign of Petr's signal here unfortunate
To All As there has been some discussion on the merits of different kinds of top loading I have performed some computer simulation, using the Antenna Optimizer program by Brian Beezley, K6STI, which
