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5 element yagi antenna for 28.5 Mhz
Gamma match will be made with a 1/2 "aluminum tube and a 75 cm coaxial piece of RG8 without sock and sheath inside the tube
post 05 Dec 2024
Antenna 10m 28 Mhz Links →
2-Element parasitic Yagis 10m-30m
No other antenna has a better relation between gain and expense than the 2-Element-Yagi. One element additional to the dipole will give you 4dB gain
10 meter eh antenna
The antenna has the same basic circuit arrangement as the 20 and 40 metre
2 Element Cubical Quad
My antenna can be taken apart and is therefore well suited for the weekend in the garden or for the field day
10m 3 element yagi
Very short boom (3,00m), for 28,0-28,8MHz lightweight construction possible
36
No other antenna has a better relation between gain and expense than the 2-Element-Yagi. One element additional to the dipole will give you 4dB gain
The antenna has the same basic circuit arrangement as the 20 and 40 metre
My antenna can be taken apart and is therefore well suited for the weekend in the garden or for the field day
Very short boom (3,00m), for 28,0-28,8MHz lightweight construction possible
PIC-Keyer This project describes the construction of a real "QRP" keyer with a small microcontroller PIC 16F84, with slightly modified hardware also PIC16F62
Qrm Eliminetor The principle is based on the fact that the interfering signal from the main antenna coming from the local interfering signal is phase-shifted by means of an auxiliary antenna so superimposed that eliminate the interference
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