max voltage

Radial ground system for verticals - Maximum-gain radial ground systems for vertical antennas by K3LC

160m Band 5 Element delta loop - The goal for this antenna project is to determine what sort of gain and radiation angle is possible on 160m using 5 delta loops with a max height of just 14m

VSWR Loss Calculator - This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR (voltage standing wave ratio) and other subsequent factors

HF Antenna - 6m to 40m - G8JNJ Fat-Max HF Antenna - 6m to 40m - a poor man’s Steppir

Basics of antennas - The current, the voltage, the impedance, the bandwidth, the polarization, and how the earth influences the famous radiation pattern.

MP3 Morse Code Practice Files  ^updated - Stories that have been converted to Morse code .mp3 files.

Electro-Magwave Incorporated - Designs, engineers and markets a unique line of mobile and fixed station RF communications antennas with a key focus on maximizing antenna value.

Comax - Morse Code Keyboard Replacement. Comax is a method of using morse code to replace the keyboard on computers

FT-817 DC Circuit Protection - A schematic for a DX circuit protection for the Yaesu FT-817, provides protection from the external power supply overvoltage by DL2LTO in german

YagiMax 311  ^updated - A freeware dos antenna design program, dedicated to yagi antenna design by K4VX

WinPic 2007 - Program bulk erases, reads, writes and verifies PIC10F, PIC12F and PIC18F families. PIC part number selection. Programmnig voltage selection. 2V to 5V/ 0.25V step. Firmware updating.

LogiPic - Logipic is a PIC Programer for windows

RadioMax - Allows any PC to improve the performance of radios and scanners, providing fully automated control of the radio (plus tape recorder if desired) allowing unattended scanning, logging, speech and tape recorder control. Works with AOR, DRAKE, Icom, Kenwood, Lowe, Optoelectronics, Radio Shack and Uniden.

Increasing Amplifier Relay Speed - Article describes a circuit that accelerates the coil of DC relays by momentarily doubling their voltage.

Battery voltage booster - A battery voltage booster project with pictures and schematic by KD7W

Fast, smart NiCD/NiMh battery charger - PCB for a battery charger described in the datasheet for the MAX712/MAX713 fast charge controllers.

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.

Datasheet catalog - DatasheetCatalog.com is free an online datasheet source for electronic components and semiconductors from ST Sanyo KEC SONY Toshiba Motorola Texas Instruments, Panasonic, Microsemi, Maxim, Rohm, Fairchild, National Semiconductors and others

Voltage protector/Fuse Assembly for 100-watt transceivers - A compact voltage protector/fuse assembly for 100-watt transceivers by AD5X

Universal frequency counter & voltage meter - to be used with QRP transceivers

6L6 Transmitter - 40 meters band 5 watts transmitter, uses a 6L6 with a 6X5 rectifier and a 0D3 voltage regulator tube on the screen.

QRP Z-Match - Small QRP Z-match project for max 10 W output by DL2LTO

Radio Modification Information Center - Tips, tricks, and modifications of Ham rigs, Ham modems, and more equipment.

Home-Brew Regenerative Receiver - Home-Brew Regenerative Receiver and experiments with low voltage operation.

A 2 tube regenerative receiver - A low voltage 2 tube regenerative receiver