Andy Would be interested to know how you get on with your NOV application for 9Khz. Still have the remains of my old 2.4Khz Tx and Rx and aerials that I used to use for cave radio location work befor
The far field of a radiated signal, where the reactive E and H fields can be safely ignored in propagation loss measurements, occurs at approximately lambda / 2.pi At this frequency, with a wavelengt
Dear Walter, LF Group, Very interesting to hear about the "million-to-one" 9kHz <=> 10GHz cross-band QSO. As a rough rule, most of the antenna books use the distance lambda/2pi as the boundary betwee
At 09:02 12/07/01 +0100, DJ2LF wrote: Some weeks before Markus DF6NM and me made some tests and found a max. audible distance of 1500m and a max. visible distance of 2500m (on screen of laptop). Rec.
To Bob nd All, the signal on 8953Hz was regular cw, RST from DL2NDO 529. Some weeks before Markus DF6NM and me made some tests and found a max. audible distance of 1500m and a max. visible distance o
"On june17th the stations DL2NDO and DJ2LF had a duplex QSO in cw, one way on 8953Hz, the other on 10.368200MHz. Frequency ratio 1:1 158 067. After opening the window the signal was loud and clear. D
"On june17th the stations DL2NDO and DJ2LF had a duplex QSO in cw, one way on 8953Hz, the other on 10.368200MHz. Frequency ratio 1:1 158 067. On 8953Hz DJ2LF transmitted 12W from an AF amplifier with