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Interesting review about active magnetic loop antenna Wellbrook ALA 1530 and 330S by ON4SKY

A shortened G5RV antenna design

KR1ST computer headset interface for Icom IC-718

Several projects which will allow you to build your own RF design test equipment.

The following transceivers can be susceptible to damage from a strong RF field (or RF-overload) IC-746 IC-746PRO IC-756 IC-756PRO IC-756PROII IC-756PROIII n1eq explain why

The WN-1 is a precision RF Watt, SWR, and DC Meter to digitally monitor your amateur radio and emergency communications stations.

An interface for amplifier to TS-850S

An Easy way to Monitor RF, AC or DC current with one instrument by W5JGV

3 to 12 MHz signal generator, simple local signal source

RF Choke to prevent hf currents on the feedline. This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.

The Radio Component Database offers a structured collection of technical documentation for various radio components, primarily focusing on those relevant to CB-Radio and general transmitter/receiver equipment. It categorizes components such as RF Bipolar Small Signal Transistors, RF FET Small Signal Transistors, RF Power Transistors, and Integrated Circuits, providing specific data for each type. The resource includes a "Shortform Transistor Catalogue" and a section dedicated to Variable Capacitance Diodes, detailing their characteristics and applications. A significant feature is the inclusion of cross-reference databases from major manufacturers like NTE Electronics Inc., ECG, Fujitsu, Motorola RF-Components, and Philips Components, which can be invaluable for component substitution or identification. Users can access specific technical data from manufacturers such as National Semiconductor, NEC Semiconductor, and Toshiba Components, with some data available in _PDF_ format. The database serves as a reference for hams and technicians working with RF circuitry, offering a centralized location for component specifications and alternatives, which can save considerable time during design or repair work.

This voice-keyer-interface connects between a Yaesu FT1000MP and a PC's sound card & COM port. It can be used as a voice-keyer with Contest Voice Blaster and as a voice-keyer and CW-keyer with Writelog.

This signal generator is intended for realignment of radio receivers

7 dB for 7 Bucks, a 2 meter beam antenna for the cost of a fast food meal!

RF Choke to prevent hf currents on the feedline or...1:1 Choke Balun, sometimes called the "UGLY BALUN"

DL2HRF shortened dipole antenna for 80 meters band

A simple drawing of a shortened antenna for 40 meters by using a PVC tube

Presented here is a transceiver to computer sound card interface complete with automated transmit key function. A sound card interface is simply the audio coupling of a computer soundcard and a transceiver to allow various computer applications that send and receive SSTV, RTTY, PSK31 and other similar modes based on soundcard generated signals.

ARRL pdf file on how remove car noise from your radio. Modern vehicles are RF noisy environments. Come learn how to identify and silence yor mobile noise sources, by WA6PDP

The Double Bazooka Dipole is a half wave dipole with an attempt at compensation of the reactance change that occurs around resonance for a half wave dipole.

The HPSDR is an open source hardware and software project intended as a next generation Software Defined Radio for use by Radio Amateurs

How to homebrew an hex beam antenna for 20 17 15 12 10 meters band by VA7ST

We offer a large selection of standard and custom High Power RF and Microwave amplifiers for broadband, general communication, matched band, and personal communication markets.

Excel sheet containing technical comparisons of commercial HF portable antennas compiled by ON4SKY. Includes pictures, manufacturer, db gain, band coverage, F/B ratio, price, weight and dimensions.

Schematics and purchasing information for the Yaesu FT - 8x7 DIY Bluetooth CAT micro miniature interface done by YO3GGX

A vertical half-moxon for the 7 Mhz by F6IRF

N6RK computer to FT-1000 interface

Interfacing tips for ICOM IC-706MKII transceiver with a Collins 30L-1 linear amplifier

If the display lamps in your TS-2000 go out. They can be replaced with LEDs.

Website for all Chesterfield Gateways on 446, using eQso.

D3+ High Performance Antennas for Field Day. This article describes versatile broadband wire antennas. These antennas will double your effective radiated power over a dipole, will be easy and inexpensive to build and install, and will be simple to match.

This document serves as a comprehensive guide for amateur radio operators looking to enhance their Yaesu FT-2000 or FT-950 transceivers with pan-adapter capabilities. A pan-adapter is an invaluable tool that allows operators to visualize the frequency spectrum, making it easier to identify signals and improve operational strategies. The guide details the necessary hardware modifications, including the RF Space IF-2000 board and various SDR options, along with their costs and installation procedures. The document caters to operators of varying technical expertise, providing step-by-step instructions and troubleshooting tips. It emphasizes the importance of using a sound card and software like PowerSDR and HRD for optimal functionality. By implementing these modifications, users can monitor multiple frequencies simultaneously, leading to a more productive and enjoyable amateur radio experience. This resource is particularly beneficial for those looking to modernize their equipment and remain competitive in the ever-evolving world of amateur radio.

Callsign lookup form for german calls

Trader net frequencies

Regenerative receiver for 5 amateur bands : 80 40 20 17 15m by F5LVG

Circuit of the Kenwood IF-10D interface for the TS-50 transceiver.

This calculator computes the matched line loss for a transmission line using a model calibrated from data for the transmission line types built in to the calculator. It also gives an estimate of the mismatched loss if the mismatch is specified.

DAVIS RF Co. has been in the business of supplying the staples of wire antennas for over 30 years. DAVIS RF Co. supply all coax cables, all connectors, ladder line, rotar control cable, insulators, and we have the largest selection of wire for wire antennas. DAVIS RF Co. is the designer and trade mark holder, and primary source for Bury-Flex Tm low loss coax cable. PolyStealth Tm high strength PE insulated antenna wire, and Flex-Weave Tm wire

FT-1000MP Automatic Band Selection Interface Bob Wolbert, K6XX

General electronic topics on interfacing to PC soundcards by epanorama.net

Circuits, pictures and data about toroids, tubes and home made power amplifiers

General purpose RF Wideband PreAmp based on BSX-20 transistor with a frequency range 14-550 MHz

A circuit that connects an IBM compatible personal computer, running TR Log or CT (etc.) contest logging software, and Kenwood transceivers equipped with serial control ports. CW keying is also provided in this RFI filtered interface unit.

Functional, easy, and cheap, all good Ham Radio characteristics by Terry Fletcher, WA0ITP

This simple circuit is intended for older Kenwood radios and was presented in chapter 22 of the ARRL Handbook.

40 meter vertical antenna construction, a shortened easy-to-build vertical, with no-radials, made from surplus military camouflage poles

Using ferrite to reduce radio frequency interference with your PC monitor or antennas with your receivers or transceivers.

Setting up and testing a sound card packet radio interface by KD5ZUG

RF power meter, dummy load, project

The 60 Watt linear amplifier is simple all solid state circuit using power mosfet IRF840.