To All Further to my report by e-mail of 15 Sept. 1919 hrs I have also simulated by means of a computer program top loads consisting of multiple parallel wires with spacings of 0.5; 1.0; 1.5 and 2.0
1. No top load Efficiency: 10.8% 2. One horizontal top load wire of 5 m Efficiency: 12.5% 4. One horizontal top loading wire of 10 m Efficiency: 11.9% 6. One horizontal top loading wire of 20 m Effi
To All, As a answer to a question by Mike, G3XDV, I have sent the following e-mail to the reflector: 1. No top load Efficiency: 10.8% 2. One horizontal top load wire of 5 m Efficiency: 12.5% 4. One h
Question to PA0SE: Dick, did you choose 1.5mm of diameter or radius? Some programs are using "radius" other "diameter"... I used diameter. AO requires the material to be put in. I choose copper, for
From PA0SE to All 1. If it is mechanically possible you might gain some dB's by placing the loading coil (or at least a part of it) at the top of the vertical section. Especially with a rather small
From PA0SE I recently installed a small broadcast transmitter on 1350kHz which was licenced for a maximum antenna height of 10m. After some time we managed to get a 10m glassfibre mast errected with
To All In my report by e-mail of 15 September 1999 19:19 top loads with 0, 1, 2 and 4 wires, both horizontal and sloping down under 45 degrees, were discussed. In report by e-mail of 16 September 199
Dear Alan, I have had no response to my request to UBA for a copy of the logging program. I guess they are not back for the winter term yet. I have downloaded the program and can send it to you as a
To All from PA0SE In case someone else is interested, let me refer to the doctoral thesis of Peter, SM7CMY with a title: 'Signal Detection in Noise with special reference to telegraphy', University H
To All from PA0SE Dear Alan, if I understand well,you are receiving CW by ear, not by Spectrogram. For receiving CW by ears I found very useful a stereo processor, like that described in http://hem2.
To All from PA0SE I am not aware of a standard test method to produce measured results of how a receiver performs in noise to signal ratio situations (especially with impulse QRN on LF), but that par
Johan, Harry, PA0LQ, has a computer programma by which he can design a network like you want, using opamps and he is willing to do that for you. I suggest you sent Harry a letter, confirming the spec
To All from PA0SE Greetings all, Further to my posting a few weeks ago requesting advice on antennas I am happy to report success. Taking advantage of the recent dry settled wx I finished the antenna
To All from PA0SE A question by Jaap, PA3GUC, prompted me to investigate the directivity of an Inverted L-antenna. I modeled by computer an antenna with 10 m vertical and a horizontal part of differe
From Peter Martinez G3PLX Congratulations to Clint KA7OEI on the hardware implementations of PSK31 for low-frequency work. Personally I think the hardware implementations of PSK31 have been rather n
To All from PA0SE, It is interesting that the Millington method used by that Vaino to calculate Reino's power seems to produce more realistic results than the CCIR Recommendation 386-7. Why is that s
To All from PA0SE May I add one more story to the fascinating ones already told about LF-DX? In December 1934 Dutch airline KLM sent a Fokker trimotor type F18 to the West Indies. The idea was to ope
Hello Gamal, My antnna modelling program AO has the possibility to compute the total field in X, Y and Z coordinates but only to a maximum of 10 km from the transmitter. Over such a short distance th
To All, When you receive an e-mail wityh attachment How to Give a Cat a Colonic do not open it. It will immediately destroy the data on your hard disk. The virus is new and is not yet recognized by a
