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J-Pole Antennas calculator
Two types of 2 meter J-Pole antennas, one made of copper pipe and a roll-up J-pole made of TV twin lead
post 21 May 2024
Antenna Calculator Links →
PHGR Calculator Power, Height, Gain and Beacon Rate
Online calculator will produce the text required to be put in your beacon string to display to others your PHGR
Quadrifilar helicoidal antenna Javascript on-line calculator
Design frequency MHz,Number of turns twist,Length of one turn,wavelengths,Bending radius
RF Toroid Inductors
Specs for T200-2 RF Toroids
RF Tools calculator
Enter the frequency of operation and the balanced and unbalanced Z0.Values for L and C will be calculated
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Online calculator will produce the text required to be put in your beacon string to display to others your PHGR
Design frequency MHz,Number of turns twist,Length of one turn,wavelengths,Bending radius
Specs for T200-2 RF Toroids
Enter the frequency of operation and the balanced and unbalanced Z0.Values for L and C will be calculated
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
Interface-for-digital-broadcasts-with-integrated-audio 4-port HUB, with a TUSB2046. With port 1 of the HUB we drive the FT232RL; with port 2 the PCM2904, furthermore, we decided to leave ports 3 and 4 free