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Helical Antenna Design Calculator
Find a tube with a circumference equal to one wavelength, and wrap wire in a helix spaced a quarter wavelength
post 05 Dec 2024
Antenna Calculator Links →
Impedance Calculators
These calculators are used by Mantaro engineers and provided freely for your use
J-pole antenna design calculator
For 2 meters, the coil is 4 turns of coax at 5 inches in diameter
J Pole Antenna dimension calculator
The J Pole antenna is a simplified version of the Slim Jim antenna, using the same matching stub principle
Log periodic dipol array
Detail of the end-fed feed of a VHF log periodic dipole array
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These calculators are used by Mantaro engineers and provided freely for your use
For 2 meters, the coil is 4 turns of coax at 5 inches in diameter
The J Pole antenna is a simplified version of the Slim Jim antenna, using the same matching stub principle
Detail of the end-fed feed of a VHF log periodic dipole array
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