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136 kHz at G3YMC
The vertical is based on my old Butternut HF2V 40/80m vertical. This forms the vertical section of the antenna, and is free standing at 10m high
post 31 Jan 2024
Antenna 136KHz Links →
Variometer Design
A variometer consists usually of two coaxial coils, connected in series, where the coils relative position can be varied in some way
VLF The stealth antenna
the passion for radio listening on HF and lower band, down to VLF
Vertical antenna with inductive toploading
136kHz antenna by placing a part of the loading coil at the top of the vertical part
Very Low Frequency Receiver
Very low frequency or VLF is the ITU for radio frequencies RF in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively
VLF converter
un mio circuitino che ho a lungo utilizzato per l'ascolto delle onde lunghe
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A variometer consists usually of two coaxial coils, connected in series, where the coils relative position can be varied in some way
the passion for radio listening on HF and lower band, down to VLF
136kHz antenna by placing a part of the loading coil at the top of the vertical part
Very low frequency or VLF is the ITU for radio frequencies RF in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively
un mio circuitino che ho a lungo utilizzato per l'ascolto delle onde lunghe
Take off angle of horizontal antenna For horizontal polarization, the electric field will move sideways on a horizontal plane, while for vertical polarization it will oscillate up and down on a vertical plane
Build a Three-Way Antenna Switch and Displa To use a wireless relay to select one of two high current capacity power relays
Calculo da Antena Bazooka A double bazooka antenna is a combination that has a complete coaxial wave multiplied by its velocity factor and a total end-to-end length of 1/4 wave for each side affected by another driver shortening factor