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Delta Loop for 7, 10, 14 and 21- MHz
The antenna was designed to work from a field conditions at amateur’s bands 7, 10, 14 and 21-MHz. The antenna has SWR less the 2.0:1.0 at height of the lower side 1.2 meters above the ground
post 05 Dec 2024
Antenna 20mt 14 Mhz Links →
Linear Loaded yagi
The center loading coil required for our model antenna showed about 248 ohms for each element
Mini horizontal V 2 element 20MT
An electrical 1/2 wave length of RG58 as a 1:1 transformer. Using the antenna analyzer from the ground the following measurements were noted, impedance 25 ohms SWR 2:1, the antenna was resonated to 14250 Khz
The Shorty Dipole for 14mHz
The dipole is half the size of the usual full sized versions and is therefore about the size of a ten metre dipole
Shorten 20m band rotary dipole
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The center loading coil required for our model antenna showed about 248 ohms for each element
An electrical 1/2 wave length of RG58 as a 1:1 transformer. Using the antenna analyzer from the ground the following measurements were noted, impedance 25 ohms SWR 2:1, the antenna was resonated to 14250 Khz
The dipole is half the size of the usual full sized versions and is therefore about the size of a ten metre dipole
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