Amateur Radio Toolkit 对比 ARRL magazines 的使用情况和统计数据

Amateur Radio Toolkit is the best app for ham radio hobbyists. It contains many calculators to help you design radios and antennas for all your projects. Tools: Coordinate calculator - Find your latitude and longitude by entering your maindenhead square. Grid square calculator - Find your maindenhead square by entering your latitude and longitude Distance calculator - Find the distance between two maidenhead squares Unit converter - Convert between units Location - Find your location Dipole antenna - Calculate the optimal lengths of a dipole antenna for a given frequency Vertical antenna - Calculate the optimal lengths of a vertical antenna for a given frequency Cubical quad antenna - Calculate the optimal lengths of a cubical quad antenna for a given frequency Inverted vee antenna - Calculate the optimal lengths of an inverted vee antenna for a given frequency Ground plane antenna - Calculate the optimal lengths of a ground plane antenna for a given frequency J pole antenna - Calculate the optimal lengths of a J pole antenna for a given frequency VSWR - Convert between VSWR, Refection coefficient, return loss and mismatch loss Three element Yagi antenna - Calculate the optimal lengths of a three element Yagi antenna for a given frequency Seven element Yagi antenna - Calculate the optimal lengths of a seven element Yagi antenna for a given frequency Wavelength frequency converter - Convert between wavelength and frequency Air core inductor - Calculate the inductance or lengths of an air core inductor Low pass filter - Calculate the units of an RC or RL LPF circuit High pass filter - Calculate the units of an RC or RL HPF circuit Ohm's law - Convert between voltage, current, resistance and power by entering two Reactance - Calculate the reactance of a capacitor or inductor Decibel calculator - Convert between decibel values or calculate dB by entering the power or voltage Voltage divider - Calculate the output voltage or resistance of one resistor Resistor Color codes - Find the resistance of a resistor by entering the colors of the bands Resistors in parallel - Calculate the resistance of resistors in parallel Resistors in series - Calculate the resistance of resistors in series Capacitors in parallel - Calculate the capacitance of capacitors in parallel Capacitors in series - Calculate the capacitance of capacitors in series Coaxial cable - Calculate the properties of a coaxial cable Inductors in series - Calculate the inductance of inductors in series Inductors in parallel - Calculate the inductance of inductors in parallel Full wave loop antenna - Calculate the optimal lengths of a full wave loop antenna for a given frequency ERP and EIRP - Calculate and convert ERP and EIRP Half wave coax balun - Calculate the optimal length of a half wave coax balun for a given frequency Small magnetic loop - Calculate the optimal lengths of a small magnetic loop for a given frequency Narrowband balun - Calculate the inductance and capacitance of a narrowband balun Pi attenuator - Calculate the values of the resistors by entering the attenuation and impedance T attenuator - Calculate the values of the resistors by entering the attenuation and impedance