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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 05 Dec 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
PIC-Keyer This project describes the construction of a real "QRP" keyer with a small microcontroller PIC 16F84, with slightly modified hardware also PIC16F62
RF Inductance Calculator Mean diameter of the air core coil, measured from conductor centre to conductor centre include the wire insulation thickness, if any
Voice Recorder Gestito dall'integrato in questione ed offre la possibilità di registrare più messaggi per una durata massima di un minuto con buona fedeltà di riproduzione