pin diode antenna switch

Antenna Basics - Article designed to answer basic questions about antennas

15m Delta Loop - Delta Loop Antenna for 15m

Quadrafilar Helix Antenna - Quadrafilar Helix antenna for 137 Mhz

Delta Loop for 50 MHz  ^pop - Delta loop and vertical antenna plans with translation in italian

50 Mhz 6 element yagi - G3PTO antenna drawing plan for a 50Mhz 6 Element Yagi

Inexpensive GPS mobile Antenna - An inexpensive external GPS antenna, for 1.5 GHz band for GPS receiver, If you operate APRS or just need an external antenna for your GPS receiver, here’s one that is easy to build yet offers surprisingly good performance in a compact size. Best of all, it uses commonly available components and materials.

A half slooper for 160 meters - Italian article includes picturer and plans to homebrew an half-slooper antenna for 160 meters band

N4UJW Ham Help Site - Learn how to be a ham. Info for becoming a ham.Antenna design and more!

Com on Bak - A retractable holder that rotates to make using a CB, FRS & Cell phone, easier without the worry of dropping or losing it.

DWM Communications - Manufacturer and direct seller of shortwave and ham radio antennas and accessories like TINYTENNA & YO-YO-TENNA

Fractal Antenna Systems - Solution to your OEM needs and can meet your design or vended antenna requirements for antennas from 400MHz to 10 GHz.

ZCG Scalar - Designers and manufacturers of radio Frequency antennas. HF - 3000 MHz TET Emtron HF Yagis, Antennas for Wireless applications, Marine antennas, Land mobile, Mobile antennas.

ARDF Projects by WB2HOL - Antennas, attenuators, Fox Timers and Controllers and Fox Transmitters

AA9CC Web Page - A few foxhunt reports, a phased array antenna plotting program and some cool links.

Icom AH-4 information site - A web site dedicated to the Icom AH-4 antenna tuner

Ham Radio Toys - Amateur Radio antennas and accessories since 1990

Cb City - Authorized dealer for ranger magnum wilson francis k40 antennas wilson cell antennas ect.

Antenna Solver - provides much greater flexibility in the construction, analysis, and interpretation of radiating structures using a rewritten NEC module.

Smith chart - Match & display imped of antennas, can graphically visualize and compare two sets of measured impedances simultaneously.

MacGPS Pro - Mapping software which links a Garmin GPS receiver to your Macintosh. Includes Maidenhead grid squares and beam-pointing maps.

Frees - Calculates the freespace range of a radio-link. It is useful for radio amateurs, radio engineers and for SETI signal estimations. Calulation of parabolic dish antenna-gain is included.

Duplex 144 432 - A full duplex antenna system for 144 432 Mhz

Ham Radio Circuits  ^pop - Circuits of SSB Transceiver, AM DSB Transmitter, Antennas, BFO, VFO, 807, FM Mike, Crystal filter and more.

Homebrew projects by dl5dbm  ^pop Priority listing - KW,2-meter,6-meter,antennas,amplifiers,preamps,powersupplys, and more

Impedance Bridge - by Harry Lythall SM0VPO