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

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.

Article on building a folded bazooka antenna

Microphone wiring for HTX-100

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

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

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

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

A 1:4 balun suitable for folded dipole antennas

Calculate your dipole, 3 element yagi and a simple dipole

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.

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

The homemade CW paddle key design, inspired by a QRP homepage, utilizes soldered PC board material for its construction. The builder, DL5NEJ, modified an existing design to achieve a smaller footprint, preferring a compact setup for portable operations. This paddle was specifically built to complement a Wilderness Radio SST20 QRP transceiver kit, demonstrating its suitability for low-power operations. The project details suggest a straightforward assembly process, with the primary components being readily available PC board scraps. The design emphasizes simplicity and functionality, aiming to provide a reliable keying experience comparable to commercial paddles like the Bencher. Performance evaluations indicated the simple paddle operates effectively, prompting further exploration into similarly minimalist QRP rig designs. Additional construction details for a similar paddle are available from PA0CMU.

Over 70 international contests are supported by YPlog, a Windows-based logging and radio control program designed for amateur radio operators. This software integrates with various digital mode applications like _WinPSK_, _HamScope_, and _MMTTY_, facilitating partially automated log entry for modes such as PSK31, CW, and RTTY. It provides comprehensive logging capabilities including QSL label printing, beam headings, and dup-checking, alongside award tracking for DXCC, ITU/CQ zones, IOTA, Grid Locators, and Counties. The program offers advanced contesting features, including multi-multi or multi-2 networked operations with automatic log data sharing, multiple Cabrillo submission formats, and configurable CW keyboard layouts. Device support extends to TR-compatible CW keying, SO2R control with Top-Ten devices like the DX-DOUBLER, and internal W9XT digital voice keyer integration. YPlog is notable for its support of the _OK1RR DXCC_ country resolution files, providing a robust historical DX compendium. Beyond logging, YPlog includes two freeware utilities: one for computing design parameters for coaxial traps and another for displaying and printing azimuth and Mercator maps from the operator's QTH. The software runs on Windows 95/98/ME/NT/2K, with a recommended screen resolution of 1024x768. Registration costs **$50.00 US** to unlock all features, including full contesting capabilities and rotator control.

How to obtain a dual voltage without a transformer

by Tony I0JX

A design of a 2 m quagi antenna by TA2IB

KF4SCI picture of a project for a VHF UHF jpole antenna working on 220 and 440 MHz.

5 elements "vee" log-yagi for 10m band- boom lenght : 4mt. Gain : over 10 dBd , f/b =over 40 db (deep null) f/b= min 20dB for different polarization signals

The beam has only one feedpoint with 50 Ohm and has an open-sleeve element for 12 m by DK7ZB

HF QRP Linear Amplifier with 2x 2SC2166 + 2x 2SC1969 Push Pull Transistors (13.8V)

A Parasitic Lindenblad Antenna for 70cm by Anthony Monteiro, AA2TX. This is the official 16 pages PDF File published by AMSAT about the 70cm Parasitic Lindenblad Antenna.

PDF resources containing information on low cost ssb,am,cw circuits, which are useful for beginners.

Coaxial cable loss in db per 100 ft.

Reports a 404 error, indicating the requested online receiver resource is unavailable. The page explains that QSL.net hosts over 30,000 websites, each maintained by different individuals, and suggests contacting the website owner directly or performing an internet search to locate the content. It clarifies that QSL.net cannot assist in finding specific missing pages or files. The page also notes that QSL.net provides email and web services free of charge to amateur radio operators and organizations. It encourages donations to support these services, providing a link to more information on how to contribute. The content emphasizes the need for user support to maintain the platform's operations.

antennas experiments by David Reid PA3HBB G0BZF

VHF Antenna in a lunchbox. The magnetic loop on two metres band Lloyd Butler VK5BR

A site devoted to Amateur Radio Homebrewing, CW-decoder, CW QRP Transceiver for the 40 & 20 meters band, CMOS reader

Yaesu FT 101 unofficial web site managed by NW2M

F6DED page of a 2 element beam W8LK antenna with pictures and dimensions, in french

Cross-Yagis for Terrestrial and Satellite Work The 2x6-El.-Cross-Yagi (28 Ohm, 2.60m Boom) by Henk, PA3GUO

Magnetic longwire baluns 1:9 combined with ground, a 1:2 and 1:1 balun connections by ON6MU

The Bazooka-antenna was developed by the staff of M.I.T. for radar use. The original Bazooka used coaxial cable for the entire radiating elements.

A small antenna for 2m and 70cm

The EZ QRA Locator softawre is a simple software for the calculation of QRA locators

SP5DDJ mini antenna tuner for QRP operations

Yaesu CAT Cable for FT-817 857 897

This little gadget is that it allows you to tune up at full peak output power, whilst limiting the average power to a fraction of the peak, thereby protecting the PA from meltdown

Easy for calculate formula which could be a wake-up call for you. The SWR value at the input of antenna cable is not a actual SWR of your favorite antenna.

Web site updated several times per month. It covers all aspects of ham radio.

MC-50 microphone modification for high emphasis, connecto kenwood ts-50 to kenwood radios.