Zespół w składzie SP5WPK, SQ2BXI i SQ5BPF postanowił przeprowadzić eksperyment z dużą poziomą anteną pętlową jako anteną nadawczą w zakresie VLF. Celem eksperymentu było sprawdzenie czy taka antena nadaje się jako antena nadawcza do pracy w zakresie VLF tj. 8,27kHz.
Encouraged with the outcome of latest earth dipole tests I decided to continue testing of those interesting antennas.
This time, however, I aimed at:
- testing the possibility to transmit in 136 kHz
- checking how a good quality electrode will impact the antenna
- confirming that an earth dipole can work effectively above the ground with low resistance
- testing an antenna of this length to be able to receive signals at the lower end HF
I used a 0.6 mm copper plated steel pole (due to cost and no alternatives available). Resistance for the pole was over 1kOhm. The cord was spread across the field lying on the grass or in the bushes at the height of 0 – 2 meters above the ground level.
Joe VO1NA transmitted on 21 december 2017 at 8270.0075Hz.His transmission was succesfuly received in Warsaw (RX Jacek/SQ5BPF), at a distance of about 5100km. This is the first succesful reception of a signal from Canada in Poland at 8270Hz.
Mode QRSS100, 137.777 kHz frequency, received signal “MX HNY”
Stefan DK7FC’s signal on 17470.1Hz is so strong, that i could make a faster grabber:
On the 476,180kHz frequency, with the power of the 50W transmitter, the IQ2MI beacon works.
The radio beacon is well received in the evenings in Poland.
More info on page: