simple ptt

Simple VHF Antenna - A simple VHF vertical aerial for the home station

Dipole antenna for 6 meter band - Here is a simple design for a 6 meter centre fed dipole antenna

Slim Jim antenna calculator - How to make a simple but effective Slim Jim antenna. It includes a calculator to work out all the mesurements for the frequency you require.

Low-Cost dipole for QRP - Here’s an economical dipole for simple QRP HF homebrew rigs.

Low-cost half wave Dipole for HF QRP rigs - An economical dipole for simple QRP HF homebrew rigs

Rhombic Antennas - Description and simulation of two types of rhombic antennas, using the software 4Nec2: the simple bi-directional and the terminated directional rhombic antenna

Coffee Can WiFi Antenna - This wi-fi antenna design is a much simpler DIY project than the pringles cantenna. Basically there are 3 parts to a build-your-own 2.4 Ghz cantenna kit: a pigtail, an N-female connector and a metal coffee can.

The vertical Double-Zepp - The vertical Double-Zepp 2x7 m is a very simple, effective 8-Band-antenna. The end of the Dipol must be 5-10 m above the ground

Roger G3XBM's Amateur Radio Blog - Simple QRP projects, 10m, 6m, WSPR beaconing, sub-9kHz and other random stuff

KD5SDJ Indian Territory Amateur Radio Society - small but dedicated group of radio operators who primarily operate on a simplex on a frequency of 147.435

Inside The Drake TR-7 - The intent of this article is to help the semi-non-technical person understand what is inside the Drake TR-7(A) Transceiver, how it works, and discusses simple adjustment and modifications the end-user can perform

Elecraft K2 Improving CW Filter - Here is a cheap and simple way to significantly improve the K2 CW filter(s). With this mod, even strong signals will fade to black as they tune out of the filter pass band

PTT INPUT for the Elecraft K2 - separate the K2 dot paddle input from the PTT

Yaesu FT-817 CAT Interface - Here is the schematic of the simple CAT interface KO4BB use with his FT-817.

NCDXF Beacon for Android - NCDXF Beacon is a simple tool to monitor the NCDXF beacons on the Ham Radio bands 20m, 17m, 15m, 12m and 10m. Upon start the the time will be synchronized with an NTP server.

VIT Voice Keyer - The VIT Voice Keyer is a simple soundcard based voice keyer. It plays various recordings and output them to your radio and key the PTT line.

Transistor PA Biasing - Here is a simple circuit that can deliver the peak base current needed for linear ssb operation

Transistor PA Biasing - Here is a simple circuit that can deliver the peak base current needed for linear ssb operation

TVI Filter schematic - A simple TVI Filter schematic

137 kHz antenna preamplifier - A simple 137 kHz antenna preamplifier to make your FT-817 (and others) useable on 2200m band.

40 meters QRP CW RTX Priority listing - This is the schematic of asolid-state 7 MHz QRP CW transmitter by VU2NAN

A Simple Receiver - the DC40 - A beginner's direct conversion receiver

30 m Band Direct Conversion Receiver - The direct conversion receiver described consists of only a bandpass filter, mixer IC, VFO and audio filter. With only 22 parts, this simple circuit should take a few hours at the weekend to construct.

Dual Radio Computer Interface - Schematic of a simple interface to connect a pc to a FT-1000 Mk5 Field and FT-817 transceivers.

A Simple QRP Transverter for 4m (70MHz) - Transverter for 70MHz, a project by G3XBM