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A home-built low-pass filter for 4m
To suppress unwanted harmonics, it is recommended to use an extra low-pass filter LPF with a 4-meter transmitter
post 29 Mar 2024
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Coax Stub Filters
This calculator is suiteable to calculate the length of a piece of coaxial cable to produce a notch at a desired frequency
Setting up filters with a noise generator
setting filters with a noise generator
Design a custom Interdigital Bandpass Filter
These filters are generally limited to frequencies above 200 MHZ because their size is slightly longer than 1/4 wavelength
TVI Stop filter
What to do, if your neighbour comes banging at your door just in that moment you want work the DX of the year
Design RF Filter
Design a third order low-pass Chebyshev filter with a cutoff frequency of 330 MHz and 3 dB
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This calculator is suiteable to calculate the length of a piece of coaxial cable to produce a notch at a desired frequency
setting filters with a noise generator
These filters are generally limited to frequencies above 200 MHZ because their size is slightly longer than 1/4 wavelength
What to do, if your neighbour comes banging at your door just in that moment you want work the DX of the year
Design a third order low-pass Chebyshev filter with a cutoff frequency of 330 MHz and 3 dB
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
Rx antennas 4Square Rx Vertical Array My frequency design of 1.825 MHz a 90 degrees line would be 33,70 metersinstead of the previously calculated 33,27 m
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 facto