max voltage

Broadband Baluns - Voltage baluns and choke (or current) baluns.

Balun 1:1 - 1:1 Ruthroff voltage balun using a T200-2 Toroid core

Balun 4:1 - 4:1 Ruthroff voltage balun design using a T200-2 Toroid core

Stealth Antennas: Indoor antennas - 8Mb pdf file containing a presentation made to the KC DX Club on stealth antennas. In search of maximal performance indoor antennas by AC0C Jeff Blaine

Understanding Antenna Gain - Antenna Gain is 'the relative increase in radiation at the maximum point expressed as a value in decibels (dB) above a reference antenna'

DX Code for DXpeditions - A guide to help maximize the fun for all participants.

ZK2V Online Log - Online logboog for ZK2V DX Pedition

ZK2X Log Online - ZK2X Online log

MaxPak Midlands AX25 Packet Radio User Group - One of the oldest Packet Radio groups in the UK

Teledao - Manufacturer of Grounding kits, cable, copper lugs, bus bars, brackets, lightning arrestors for coaxial feeder cable & fiber cable lightning protection & grounding

An introduction to HF Propagation - This article will help to unravel some of the mysteries as well as giving useful operating tips to maximize your chances of working that rare station by G4UCJ

RF Basics - A PDF guide to radio and radio frequency by Martin D. Stoehr

SB-220 Repairs and Modifications - Heathkit SB 220 mods, replacing the Zener ZD1, replacing the plate-voltage voltage divider, adding a keying circuit for solid state transceivers

Heathkit SB-220 Meter Repair - Repairt a Heathkit SB-220 Linear Amplifier with a bad Plate Voltage meter

Changing Filament to Kenwood TL-922 - Mod to reduce filament voltage by using thinner and longer wires from filament transformer

mhuxd Priority listing - Use microHam Keyers under Linux Daemon implementing the microHam keyer protocol. Provides virtual serial ports. Supports CW Keyer, DIGI KEYER I/II, micro KEYER I/II, MK2R(+), micro2R.

MicroMUF - MicroMUF is a windows free HF propagation calculator that you can use to estimate the MUF (Maximum Usable Frequency) and LUF (Lowest Usable Frequency) between any two points on the Earth.

Yaesu DSP Settings for Heil Microphones - To achieve maximum audio quality it is important to adjust the DSP settings of your transmitter when using Heil microphones.

A Precision Voltage Reference - A project by Don Wilhelm W3FPR

A NiCAD Battery Charger - A NiCAD Battery Charger with Current and Voltage Limiting

Fuses - About Fusues, current and voltage rating, type of fuses

High voltage power supply - An High voltage power supply design by F1FRV

40 CW QRP Transmitter  ^new - Here is a easy to build and cheap CW transmitter using 40 m cristals. Power output is approximately 6 Watts for a supply voltage of 13.8 VDC

SWR calculator - Online VSWR Voltage Standing Wave Ratio Calculator

RF Probe Project - If you needed the ability to quickly measure RF voltage for tuning filters and cavities this RF Probe probe is for you