simple ptt

Homebase10 Antenna for 28MHz - The Homebase10 is a simple to make wire halo antenna for 10m (28MHz) built using parts available from the local DIY store.The resulting antenna is very effective on 10m despite its small size and light weight.

40 m linear loaded dipole antenna - The K4VX linear-loaded dipole for 7 MHz, simple and practical way to make a short but efficient 40-meter dipole.

Antenne Topfkreis - A simple vertical antenna for 70 cm band

EH antenna for 11 meter - A very simple Eh antenna for 11 meter, drawings in english and italian.

Mobile Portable Whip Antenna - A simple base loaded quarter wave vertical, which can be used on a car or portable by G3YCC

I7SWX Coax-Fed multiband antenna - This simple multiband antenna works on all HF bands from 3.5 to 30 MHz, including WARC bands other than 10.1 MHz.

Simple wire antennas that work - Dipole, inverted V, full wave loop and grond plane antenna quick reference plans

Southeastern Asterisk Radio Networks - Interoperability solutions via Asterisk based RF Gateways - Southeastern Asterisk Radio Network (SEARN) and the Southeastern Asterisk Amateur Radio Netwok (SEAARN) are designed for the purpose of developing interoperability capabilities amongst diverse communications systems. Digital Amateur Radio Project Association - DARPA expanding the digital experience.

Simple CW keyer - OH7SV ultimatic type keyer with Dit priority

VQSpot for VQLog - VQSpot is a simple program developed for sending DX-Spots automatically when QSO are logged into VQLog

SatWarn for SatPC32 - This is a simple program that communicates via DDE with the excellent DK1TB's SatPC32 satellite tracking program and gives a voice warning when a satellite rises above the horizon.

Morse Key for iPhone - A free simple touchscreen-based CW Morse Code straight key. Practice sending Morse Code on your iPhone.

A Modest Antenna Rotor Installation - A simple TV Rotor installation by W7ZOI

Simple Two Position Remote Antenna Switch - w4kaz antenna swicth

Simple beacon construction notes - Here is a simple, self-contained beacon which can run a few milliwatts or as much as a watt depending on choice of amplifier and supply voltage.

Electronic calculator - Some simple electronics calculator in javascript

Bandpass and I.F. Filters - On this page a popcorn highpass filter, some inductors and their Q , double tuned bandpass filters and simple Cohn Crystal ladder IF filters are presented.

A Simple Dual Band SSB Transceiver - Homebrew a dual-band transceiver with a crisp receiver and a clean SSB signal

Tuna Tin 2 - The Tuna Tin 2 is a simple transmitter originally designed by the legendary author and experimenter Doug DeMaw, W1FB. The TT2 was first published in the May 1976 issue of QST.

QRP AM CW transmitter - A simple low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM oscillator

QRP transmitter with VXO - This is a nice 1 W QRP transmitter that can be used in combination of one of the simple receivers.

CAT programming interface for ICOM rigs - This simple and cost effective interface circuit is designed for use with any ICOM amateur radio equipment with CIV interface

PC to RTX interface - Interface with galvanic isolated audio and digital paths. For ICOM IC-706, IC-718, IC-746 and IC-756 HF transceivers, the next one suits modern KENWOOD HF RIGs and the third is a simple "PSK-31" interface.

Digital power meter - A simple digital power meter by Dave Roberts, G8KBB

RF Probe - The Sharpie Probe, homemade with simple tools and few resistors