Archive for the 'Accessories' Category

DC Motor Controller

The venerable National Semiconductor dc motor controller IC combines with a modern PICAXE micro-controller to provide one-knob tuning control of a small loop antenna.

Aluminum RF power splitters under test

Two RF power splitters

Two examples of square aluminum RF power splitters built from 1973 plans reveal a 15 MHz difference from the claimed design frequency.

Flux remover damages Lexan

Lexan and flux remover do not play well together.

Rose’s KX3 Case and Cover

Rose’s KX3 Case and Cover

Protecting your portable radio gear is important and Rose’s Elecraft KX3 Case and Cover accomplish this nicely.

An HF Amplifier for your QRP Rig

An HF Amplifier for your QRP Rig

Communication Concepts, Inc. offers 100 watts for the QRP crowd who, sometimes, want more.

DXE knows how to package their products

DXE knows how to package their products

Kudos to DX Engineering for perfecting the packaging and shipping of their products.

Unruly Tube Amplifiers

Advice on knowing how to spot the dreaded amp killing VHF Parasitic Oscillation in tube amplifiers for the amateur radio service.

Johnson Match Box works well at Field Day 2008

Johnson Match Box works well at Field Day 2008

An old Johnson Kilowatt Matchbox worked perfectly with a 135 foot ladder fed antenna at Field Day 2008.