Search results

About SWR, and use of SWR Meter, home made a swr meter.

This wire-beam has one radiator-element, feeded with 450-Ohm-Wireman-twinlead and needs an antenna-tuner. For the bands 6m, 10m, 12m, 15m, 17m and 20m bended reflector-elements are used. The support is a cross of 4 fibreglass-fishing-rods

Simple eprom programmer for 27Cxx family , used in TNC and G3ruh modem, eprom tutorial, schematics and KissEprom software for windows by iz7ath

The "EZ-Tuner" is a homebrew automatic legal-limit antenna tuner that covers all amateur HF bands from 160-10 meters. Using a T-network design and controlled by a BASIC Stamp BS2sx microcontroller, the EZ-Tuner will match at least a 16:1 VSWR for either unbalanced or balanced transmission lines.

Esr meter to measure the equivalent serie resistance of capacitors

A friendly dx net who welcomes new comers to amateur radio and the serious dxer alike; Daily from 2000gmt on 14.208mhz. Listen the net live.

RTTY press services in english sorted by frequency

Homebrew web site

A Short Back Fire antenna improved for Wireless-LAN applications

A simple multi-band magnetic loop antenna designed for 20, 30 and 40 metres, made from 16 feet of RG58 coax cable. The performance is impressive for its size but not meant to replace a Yagi. The antenna features a tuning head, matching unit, tuning capacitors, band change switch, and matching transformer. The feedpoint is at the bottom of the loop. The document provides detailed instructions on assembly and operation.

Short guide to build your own groundplane antenna, includes radial measurements fro warc bands

Quad and Yagi portable antennas for 50 mhz by VE7CA

Excel spreasheet that calculate virtually every transmission line parameter that one may need. Include Length conversions, Reactance and Length of Stubs

A complete documentation with pictures and design of a deltaloop antenna and 1:2.5 balun

How to build a trapped rotary dipole with many photos ecc.

A site for collectors, users, restorers of the historic World War Two radio, The Wireless Set No. 19, built in the UK and Canada, and used by many Allied armies.

This is a C-L-C type tuner with a reflected power indicator. Tuning is done for minimum reflected power.

HF/6M antenna tuner preselector and antenna switcher project by ON6MU

20 meter wire j-pole for 14.2 MHz, a vertical, end-fed half wave antenna by N1LO

Various Yagi antennas for 70 Mhz band

SSTV info for beginners also has links for other data modes psk31 etc and links of interest to radio amateurs

Article on building a folded bazooka antenna

Microphone wiring for HTX-100

This is a propagation prediction program tailored to the serious contester

The W3DZZ trap dipole is a versatile and economical antenna option for amateur radio operators looking to work multiple bands without the need for extensive equipment. This antenna design utilizes traps to allow operation on various HF bands, making it suitable for both casual operators and serious DXers. Its construction is straightforward, making it accessible for beginners while still providing excellent performance for seasoned hams. Constructed with readily available materials, the W3DZZ trap dipole can be built to fit specific band requirements, allowing operators to optimize their setup for the frequencies they intend to use. The design is particularly favored for its ability to maintain a low profile while delivering effective radiation patterns. Whether you're contesting or chasing DX, this antenna can enhance your station's capabilities without breaking the bank.

Build parabolic WLAN antenna adapted from a small satellite dish. It provides high gain and long range connections.

Evolution of a project of a small magnetic loop resonating from 80 to 40 meters

AM/FM/CW QRP RF Power Amplifier for the HF 10 or 11 meterband (28MHz/27MHz)

Why Packet Radio? Could be, You are Missing Something Funm, by Greg Jones, WD5IVD

Technical reference about Accessories, Amplifiers, Antennas, Cable and Connectors, Filters, Geography, Grounding, Gunk, Matching Networks, Projects, Propagation Info Radios, RFI/EMI, Rotors, Station Setup, Towers.

A 3 and 5 element portable yagi antennas for 2 meter band

Radio propagation prediction and simulation tool for VHF-UHF, based on the Irregular Terrain Model, also known as Longley-Rice. Can be used as a repeater site planing tool and radio coverage analysis. Currently it works on Linux and Windows.

Dedicated to Yaesu FT847 with mods infos and links... by F1MDT

U.S. Marine Corps in PDF format

1500 Watt HF power amplifier

This project describes an ARDUINO based automatic antenna tuner, for an end-fed half wave (EFHW) antenna, working on 20 & 40 meter bands

Italian page including pictures schematics diagrams of an home made linear amplifier using four EL509 in parallel. Output power is about 700W.

RTTY SSTV PSK31 MFSK MT63 PACKET APRS and more...

N6QAB Radio Direction Finding Web Site, DF vehicles, transmitters, sniffers, dopplers, TH-D7A

YU1AW project for a home made QRO PA 144 MHz 20 kW GU36B-1

Mods and manuals for the FT-2000

Amateur quarter wave ground plane antenna calculator, calculate vertical and radial length

This Field Day Vertical Antenna project is the result of many years of attending various field day sites and realizing that what was needed is a simple, easy to assemble vertical antenna.

A 1:4 balun suitable for folded dipole antennas

These devices are called Traps, but they are actually more like frequency sensitive switches. They are parallel resonant, high Q, tuned circuits which provide a very high impedance at their frequency of resonance.

Calculate your dipole, 3 element yagi and a simple dipole

What type of antenna should I get? Well, the best type of antenna for working the OSCAR satellites are circular polarized antennas

Use plain water with a little salt added to build your own Dummy Load

VE7CA reprint an interesting article taken from arrl antenna compendium. Two elegant practical and portable 6-meter gain antennas, a two-element quad and a tree-element Yagi antenna for 50 Mhz-6 meter band

How repair the traps, and then homebrew the rest of the antenna, including the matching box