df antenna

Marine corps antenna handbook - U.S. Marine Corps in PDF format

3 Element Antenna for 28 Mhz  ^pop - The DF9CY three-element antenna for 28 MHz by Christoph Petermann DF9CY

Build this Novice 4 band vertical  ^pop - Home made vertical antenna for 80 40 15 10 meters ARRL PDF file taken from QST June 1978

50 MHz Antennas by DF9CY (4 & 6 Element)  ^pop - Two well performing 50 MHz antennas designed with W7EL EZNEC along to many other antenna projects and related articles

80 meters wire antenna  ^pop - A reduced-size 80-meter antenna designed for small lots, portable use, and a fine companion for QRP

AMRAD Active LF Antenna - The AMRAD Active LF Antenna. You can tune into LF activity with this easy-tobuild and erect active antenna. As a bonus, you get MF and HF coverage, too—not to mention world-class performance

Testing EH Antennas - EH antenna tests report by Claudio Re, I1RFQ in pdf format

EFHW Vertical Antenna - Steve G0KYA project of and End Fed 1/2 Vertical

J-Pole antenna design  ^pop - Complete guide to build Jpole antennas with online dimensions calculator.

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.

Broadband receiving antenna matching - This article addresses the subject of obtaining the best signal transfer from an antenna to the typical 50-ohm receiver input over a wide frequency range, with emphasis on medium-wave (500 – 2000 kHz), encompassing the standard AM broadcast band and the 160-m amateur band.

SWL home made antennas  ^{updated  pop} - Short guide to home made antennas for shortwave reception, in pdf format

160 meter sloper antenna - The 160-meter sloper system at K3LR

Half-sloper antenna for 40-80 - K9CZB QST article about sloper antenna project for 40 and 80 meters band

Better Results with Indoor Antennas - A different approach can help you optimize attic-bound aerial by W6HPH

The Bird Feeder Antenna - A hidden antenna must be just that: hidden. So don't install an antenna, but something else. Lika a bird feeder.

Phased Arrays - Phased arrays of short vertical antennas, pdf file

Vertical wide band 7-21 Mhz  ^pop - The RXO unitenna pdf file a vertical antenna for 40 to 15 meters band

The Antron 99 exposed!  ^pop - Have you ever wondered what was inside the Antron 99 antenna?

DF9CY - ZX15/4 extended 10/4 - A 4 element addition for 10m to an existing 4 element yagi (ZX antennas)

Titanex  ^pop - Low weight Titanium Verticals, Log-Periodics, Yagi antennas, Quads, towers and antenna accessories by Titanex

The Adcock HF RDF Antenna - The Adcock antenna has been used for a long time for RDF. It is basically an interferometer.

RDF projects - Antennas, attenuators, fox timers, controlers and transmitters

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

Quadrifilar helicoidal antenna - Design your own quadrifilar helix, the site even generates a drilling pattern in a PDF file. Several different construction methods are shown.