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List of mods for the ICOM IC-7000 with many PDF Files

A monoband yagi for 14 MHz a PDF article from 73 amateur radio magazine by AB4GX

Measurements that show it doesn't make much difference

144 Mhz portable 4 elements quand antenna by N1LO

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.

Band-pass filters can be critical components in competitive stations. This setup may help put your station on the map.

An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band

Illustrates the specific wiring and configuration steps required to interface an SGC-230 Smartuner with an Icom IC-706 HF/VHF/UHF transceiver. The document details the necessary connections for power, control, and RF signal paths between the two devices, ensuring proper impedance matching and automatic antenna tuning functionality. It specifies the pin assignments for the IC-706's ACC socket and the SGC-230's control port, crucial for successful integration. Outlines the operational considerations for the combined system, including initial setup procedures and potential troubleshooting tips for common connectivity issues. The resource presents a clear, diagrammatic representation of the interconnections, which aids in visual comprehension of the required cable fabrication or modification. Covers the specific settings within the IC-706 menu that need adjustment to enable external tuner control, such as the 'TUNER' function and other relevant parameters. This ensures the transceiver correctly communicates with the SGC-230 for efficient antenna tuning across various amateur bands.

This is a popular antenna design as the performance is very good across the HF bands and requires little or no tuning. It is a dipole fed off center with a 4:1 current balun at the offset feedpoint. The antenna shown covers 80, 40, 20 and 10 meters with 15 meters and WARC bands

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

Power supply from 3 to 30 V with an L200 IC by dl5dbm

CW decoder project that automatically adapts itself to the CW rate and may be employed for learning purpose substituting the traditional tone generator and offering the capability of displaying the keyed code.

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, to not to mention world-class performance

A compact directional receiving antenna

This attenuator is worth your attention. Built like the proverbial brick outhouse, it's one you can easily duplicate by N9SFX Pdf file

Make yourself a Diplexer

A Comprehensive roundup of the most popular QRP transceiver kits on the market in recent years in PDF format

D-star technical requirements and documentation

DF9CY Active Magnetic Antenna project

A different approach can help you optimize attic-bound aerial by W6HPH

A monoband end-fed half wave for 10m, 20m or any other HF band, includes a PDF with detailed information to build your own monoband or multiband antenna

K9AY receiving antennas for PA6Z made by PA9M

Amateur Prefix Maps by UT0UM updated with ARRL DXCC and ITU changes, available for download in PDF

High speed silicn diodes work well as RF switches. This article describes how to use diodes for selecting two or more filters ARRL QST article by W1FB

VU2VWN project to homebrew a CW for 40 meters band

The Classic Multiband Dipole Antenna QST article. The open-wire feed line dipole antenna is easy to install and offers surprising performance on several bands. You can install it in almost any configuration; it does not have to be strung in the traditional horizontal flat top

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.

Simple, low cost interface between Kenwood serial ports and contest logging programs by Bob Wolbert, K6XX

TL922 Service manual

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

An interesting and very detailed report analysis of three populare HF+6m transceivers. Yaesu FT-950, ICOM IC-7410 and the Kenwood TS-590S by AB4OJ

WAS Map, worked all States by ARRL

An RF power supply for 144 MHz schematics and instructions

Yaesu FT-2000 FT-2000D Cable connections

A portable 4 elements quad antenna for 144 MHz, 9 to 10 DBd forward gain, 30 DB front-to-back ratio, and 33 DB front-to-side ratio

A compact Quad Antenna for the HF Bands by GM0ONX

A pdf file with review of RTTY contests software available on the net and information on how to operate a RTTY Contest, by RSGB.

This tutorial will set out the design stages required to design a theoretical microwave amplifier

How to calculate "phasing line" lengths that actually work.

Article on radiation patterns of small loops, equivalent circuits of loop antenna, small loops as receiving antennas, ferrite loops

Schematic for Data, power, CAT, Key and Mic connection interface cable

Excellent poster representing the electromagnetic spectrum from 31.2 mHz to 6.52 EHz, PDF file poster designed by Anthony Tekatch

VA3EXT 5 element beam antenna for 6 meters band

A pdf file with schematics of an ssb and cw filter AF amplifier

Choosing the right antenna for you, by Lewis G. McCoy W1ICP

DG6RBP homebrew project for a USB cable progtamming interface for the Yaesu VX-2 radio

by Lou Blasco VK3ALB

W3DZZ trapped multi-band antenna, exposed in this practical wireless article

Simple, easy to build, low cost, compact, multiband By Robert Wilson, AL7KK

Deciphering weak or noisy **CW** (Continuous Wave) signals often presents a challenge for amateur radio operators, particularly in contest environments or during DXpeditions. CWLab04X addresses this by providing a software solution that leverages **DSP** (Digital Signal Processing) capabilities of a soundcard to decode Morse code. It functions as both a receiver and a sender, supporting traditional CW and a unique "CCW" mode designed to enhance copyability of signals struggling against high noise floors. The program offers two installation methods: a Windows-specific installer for straightforward setup or a zipped package compatible with Windows and Linux systems running Wine. Users must first download and review the accompanying PDF documentation, CWLab04.pdf and CWLab04_Hardware.pdf, which detail the software's operation and the necessary soundcard interface circuit. The hardware PDF outlines a direct connection from the receiver audio output to the soundcard input, with optional conversion of the soundcard output for hard-keying or microphone input. CWLab04X is intended as an operational aid rather than a replacement for skilled human copy, particularly highlighting the effectiveness of its CCW mode in adverse signal conditions. The software was last revised in April 2009, with installation requiring the LV Runtime 602.