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Antenna in ferrite per OL 10-500 KHz


E' possibile costruire un'antenna in ferrite per LF ottenendo buone prestazioni con una spesa assolutamente irrisoria
post 23 Dec 2021


Antenna 136KHz Links

75



My 136 kHz Station
The antenna requires 4mH at 137 kHz to tune it and I have built a loading coil with a variometer using two polystyrene plastic

My LF/MF Antenna Tuner
The LF loading coil and connect it to the antenna tuner

Operation on the 136kHz Band
The traps can be ignored at LF. A huge base loading coil is needed to resonate the antenna against ground

Operation at LF and MF
There is no preamp at the loop! In the shack, the RG-58 connects to a 50 ohm in/out preamp

Prove di trasmissione nel sud Italia
Un TX ibrido Transistors Valvole da 50w.out, ed un antenna verticale di fortuna si sono raggiunti i 10 km. in cw standard

10 m| 12 m| 15 m|
17 m 20 m| 2 m|
23 cm| 30 m| 40 m
6 m| 70 cm| 60 m| 80 m| 160 m| 136 khz
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