hl 60u circuit

A 4:1 Balun  ^pop - A single-core 4:1 current balun of improved performance by Chris Trask N7ZWY PDF file

Double Bazooka Dipole - The Double Bazooka Dipole is a very efficient antenna which is very quiet,and does not require the use of a balun

Short Whip Antenna Tuner - Here is a circuit that will resonate a short whip antenna for the HF Bands.

Vertical and Above - Using vertical on six meters band and above, by Peter Schleuss, HB9RUZ

ZL1BPU Rotator Controller - A very simple controller circuit, with fairly smart performance! The ZL1BPU Rotator Controller has been designed as an add-on unit for the popular Kenpro KR-400 and Yaesu G-400 rotators. The controller consists of a small circuit board which fits inside the rotator control box (see picture).

N4HLF KG4KIZ - Beacon On The Air Since 1999 and runs 24 / 7 and SHARED with KG4KIZ.

WA3TVG The Laurel Highlands VHF Society - The Laurel Highlands VHF Society, Inc. owns and operates the Acme repeater, located on the Chestnut Ridge in southwestern Pennsylvania.

NM-ARTS - Amateur Radio Technical Society - A hardware and software project group to support learning and creation radio circuits, general electronics, and uProcessor control systems

Packaging Radio Equipment for Shipping

K6XX CW Indicator Kit - The purpose of this circuit is to light a LED in your radio when you tune to within +- 20hz of a cw signal. This makes for easy tuning of a cw signal by eye rather than by ear

AO-51 Monthly Schedule - Current schedule for AO-51 satellite

Is HF propagation reciprocal - Some test circuits using the ACE-HF System Simulation & Visualization software, about reciprocal propagation on HF bands by NW7US

RF Circuit design basics - Ebook by Akira Matsuzawa Tokyo Institute of Technology, Building blocks in RF system and basic performances, Device characteristics in RF application , Low noise amplifier design, Mixer design and Oscillator design

Shortwave Converter - This is a simple circuit that when placed near an ordinary AM broadcast radio will allow you to receive international shortwave broadcasts in the 5-6 MHz band

APRS/CE Pocket PC Ham radio APRS - APRS/CE is a richly featured APRS software package for WindowsCE and especially the PocketPC, Maps are plentiful as it works with DOSAPRS, PocketAPRS (for the Palm) and MacAPRS maps offering an exceptionally compact APRS installation.

Target 3001 PCB Design - Represents a new generation of CAD/CAE software for circuit design. Has been created to meet the requirements of professional design engineers.

WaveCon ProCap - Microwave/ RF Circuit Design and Analysis Software

W2IOL GCGC Distance/Bearing - Freeware dos and linux command line executables to calculate grid great circle/geodesic distance, azimuth/bearing and MUF calculator by W2IOL

Morse Code Master - Highly innovative, audio-visual morse code training software for 'slow' and Farnsworth methods from Stratosoft.

AA Battery Solar Charger - This almost trivial circuit may be used to charge a pair of AA or AAA sized rechargeable battery cells from sunlight.

FM Morse Code Keyer - A simple circuit which will generate a 700 Hz tone into any FM transceiver allowing an amateur to practice CW with another amateur on a 2 meter simplex frequency.

20 Amp power supply - A 13.8 volt 20 Ampere power supply project

Signal Generation Solution - Build an inexpensive RF signal generator

A reliable VOX PTT circuit - This VOX PTT has been designed with Echolink in mind, but it will work equaly as well with repeaters

Fun With Tubes - Dedicated to passing on and preserving knowledge of vacuum tube circuits and techniques