Drainpipe Antenna Project
German language WEB site (poor Google translation) >> LINK
Make your dreams come true
ExpressPCB is a Free PCB software is a snap to learn and use. For the first time, designing circuit boards is simple for the beginner and efficient for the professional. ExpressPCB Board manufacturing service makes top quality two and four layer PCBs.
Be on the air with just some meters of wire
Can be used with reduced efficiency up to 150 MHz Principle of operation: Usual internal tuners or external tuner only have a limited impedance range. The matching of a short wire (short in comparison to the wavelength) with it’s high impedance is usually not possible. Further the wire is usually outdoors, the tuner sets in…
Trident Pneumatic Tennis Ball Launcher for wire antennas
WD6CMU wrote: Field Day 2003 was the testing ground for the third generation tennis ball launcher, dubbed “Trident”. Two legs and the apex of a 400′ vee beam were hoisted with three shots, a fourth shot was used to pull a messenger line over the beam to pull it loose from tree snags — a…
Make your kids happy
Your First Crystal Radio (How to) or building a crystal radio out of household items. The most difficult part of building a crystal radio is building an efficient earphone that can convert the tiny electrical signals into tiny sounds that our ears can hear. Our first radio used a telephone handset for an earphone, and…