23cm helix

Quadrafilar Helix Antenna - Quadrafilar Helix antenna for 137 Mhz

G4CQM Homebrew VHF Yagi antennas  ^pop - Homebrew VHF Yagi 50MHz 144MHz 432MHz 1296MHz 2320MHz 6M 2M 70CM 23CM 13CM Yagis

70 cm ATV Antennas  ^{updated  pop} - Home made antennas, ATV stuff, 70 cm antennas, helix antennas and a lot of intresting pictures to view

The Gain of the Axial-Mode Helix Antenna - by Dr. D.T. Emerson, National Radio Astronomy Observatory (NRAO++). Antenna Compendium Volume 4, pp 64-68, 1995, published by the ARRL.

Helix Antenna - Design helix antennas with this DOS program by OH0NC

Quadrifilar Helix Antennas - The purpose of this page is to provide information and links about Quadrifilar Helix Antennas. It's the best antenna to use for APT satellite reception

Helix Calc - Helix antenna calculator, to design and make helix antenna plans

Online helix antenna calculator - PHP Helical antenna calculator, need SVG viewer

Mobile Helix Antennas for HF - Normal mode helix antennas for HF mobile. Photos andn plan for a 20 meters mobile helix antenna by N2MH

QFH antenna for weather satellite band - This article describes how to make a quadrifilar helix (QFH) antenna easily, from inexpensive materials: uPVC plumbing pipe and RG-58U co-axial cable

900 MHz Helical Antenna - Photos and description of a homebrewed 900 Mhz antenna

2.4Ghz Helix antenna  ^pop - Concise instructions on making a broadband helical antenna for 2.4GHz use, such as: 802.11b wireless networking 2.4GHz video links.

A 16 Turn S-Band Helix - This design represents the smallest practical antenna for Oscar-13 mode-S. Perfect beacon reception at all times is possible, and acceptable SSB even at 43,000 km range.

VHF/UHF Long Yagi Workshop  ^pop - Yagi plans and notes for 6m, 2m, 70cm and 23cm

1270Mhz Yagi Antenna - Build your own antenna for the 23cm band ( 1250Mhz - 1280Mc ) using some aluminium and this simple design.

A Quadruple Helix for AO-40 - A homebrew project of a quadruple helix antenna system based on G3RUH 16 turn helix antenna for 2.4 GHz.

DF6NA : VHF Audio Examples - Sporadic E, meteor scatter, 70cm 23cm and 10Ghz audio recordings in various modes

M2 Antennas - 80m to 23cm beam antennas, oscar antennas, and antenna rotors

PD0HNI ATV projects Priority listing - Pd0hni 3cm 6cm 13cm 23cm 70cm ATV projects

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.

Design and build helix antennas - An on-line javascript calculator and quite a few pictures to show how to make a helix antenna.

23cm PSK packet RTX - 23cm PSK packet-radio RTX for 1.2Mbit/s user access by Matjaz Vidmar, S53MV

High-speed packet 23cm - 23 cm wide-band transceiver for high-speed data or audio by PE1JPD

23cm dual stage preamp - A modification / combination of the DJ9 BV & I5TDJ 144 MHz preamp designs

23 cm GaAs FET preamplifier - On 23cm the best way to obtain a good RX-sensitivity is to use a GaAs-FET in the front-end, since these devices show very low noise figures.