Helix antenna construction

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Helix antenna construction

Helix antenna construction

Design frequency mhz, number of turns, turn spacing wavelengths

post 05 Dec 2024

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Coil Inductance Calculator
With both calculators, the main limitation is that they be Single-Layer Air-Core inductors

Amateur Radio RF Safety Calculator
This is a main beam power density estimation program intended for use as part of a routine evaluation of RF

Cubical Quad Antenna Calculator
Requires only the entry of the center of the frequency range your quad antenna will be used in

PIC-Keyer

PIC-Keyer This project describes the construction of a real "QRP" keyer with a small microcontroller PIC 16F84, with slightly modified hardware also PIC16F62

Radioassistance

Radioassistance Radioassistance E Kenwood Dealer, vendita ricetrasmittenti, antenne, parti di ricambio, elettronica

Conrad Electronic

Conrad Electronic Electronic components online shop in German and Italian

Simple Rtty codec system based on arduino e android A unit for receiving Rtty transmissions was created, the differences are essentially limited to the Arduino software used

All band dipole Mk2 The All Band HF Doublet is often referred to as a random length dipole as it is generally as long as the available space within reason, but here are a couple of limitations to the ultimate dipole length

160M 1/4 Wave Vertical 160m vertical antenna project. It is 100' of Rohn 25G and a 20' aluminum stinger. The base is made out of four 6' power line insulators sandwiched between two Rohn base plates. 7/8' stainless bolts hold the assembly together. 32 radials 50' long and 30 radials 100'

DHD Double Half Delta

DHD Double Half Delta This is a dhd double half delta in theory it should return a low signal but with a good s - n ratio roughly like a beverage

Visual CW Tuning Indicator

Visual CW Tuning Indicator Many transceivers set the CW transmit off-set equal to the set's sidetone frequency. But it was left to the operator how to match incoming signals to the sidetone for one-frequency QSOs an awkward and time-consuming procedure

Convert ADIF to Cabrillo Format

Convert ADIF to Cabrillo Format Have an ADIF file from amateur radio contesting, but the contest you want to enter wants a Cabrillo-formatted file? This is the tool that you need

trap-dipole-7-10-14-18-50-mhz

Trap Dipole 7, 10, 14, 18, 50 MHz Trap dipole 7-10-14-18-50mhz with balun coax cable

Diy Arduino CW keyer

Diy Arduino CW keyer I added code to read push-buttons on digital pins to trigger hard-coded messages like CQ and CQ SOTA