rci 2970n2 modifications

A comparison of commercial 4m verticals - Ian Hogan G6TGO has recently tried out two different commercially-built vertical aerials for 4m, and has prepared this article to share his findings with us.

Comparison of 70 Mhz antennas - Comparison of 50 and 70 Mhz antennas, commercial and home made projects

Comparison of two windom antennas - The antenna comparison being reported was between a commercial Chelcom 136ft multi-band windom designed for 80m to 10m and a home brew 260ft full size windom designed for 160m to 10m by G0VVN, G3KAU and G3GRO

South East Alberta Amateur Radio Club - SEAARCis located in Medicine Hat, Alberta

W6BML Mount Shasta Amateur Radio Club - Non-commercial association of radio amateurs, organized for the promotion of interest in Amateur Radio communication and experimentation

W0AU Warrensburg Area Amateur Radio Club - Waarci - warrensburg area amateur radio club inc.

W8WE Mansfield Ohio Amateur Radio - The InterCity Amateur Radio Club welcomes you to Mansfield, Ohio.

TSARC INC - Texas Southmost Amateur Radio Club

Tomco RF Amplifiers - Rf amplifiers for commercial, industrial and scientific applications

Fiberglass Products - Fiberglass Fabricators of Quality Commercial Products & Industrial Components

Comprod Communications - Maker of robust and strong commercial and amateur radio VHF UHF antennas

Heathkit SB-220 - The Heathkit SB-220, two 3-500Z, amplifier made a notable impact in the world of amateur radio when it debuted in 1975. Resources and modifications

YAESU FL-2100Z Amplifier Repairs - The FL-2100Z amplifier referenced in the following images is the 6-Band model covering 10m thru 160m (no WARC bands) and not the 9-Band version that included the WARC bands. Modifications, schematics and manual

Modifications for the Kenwood TS-850 - Another good collection of TS-850 modifications

Two Kenwood TS850 modifications - Here are two simple modifications / repairs for the Kenwood TS850 HF transceiver, dual receiver mod, and battery pack replacement

Modifications for the Yaesu FT-847 - Some interesting mods for the 847

Far Circuits - FAR Circuits is exclusively a manufacturer of Printed Circuit Boards for electronic projects that are used by the Amateur Radio and electronic hobby enthusiast.

Wadsworthsales - Manufacturer's representative of wireless communication radio equipment, 2-way radio sales, land mobile radio sales, repeaters, duplexers, antennas, pl tone, hf, vhf and uhf data modems and LAN ethernet radio modems for commercial and amateur radio users.

DesignWorks - Commercia, productive and easy-to-use electronic circuit schematic drawing tool Featuring full hierarchical design, standard and custom netlist formats, extensive symbol libraries, scripting and customization features and much more.

Ipox5 radio link system - Ipox5 is the freeware version of a commercial radio linking system, designed for amateur, nhw, emergency communications etc. It is optimised for mobile broadband and difficult IP links. It allows PC access, and up to 100 users on your link at one time. Usefull for multiple PMR446 use on very large sites. Works under Windows 98, XP, Vista, and Linux (under Wine)

RTPDir bridge software - rtpDir: rtpDir_for_EchoLink_and_IRLP RTPDir bridge software(Real Time Protocol Director). It can be used on the Amateur bands, Government, commercial and private nets, or direct user to user without any radios connected.

AA Battery Solar Charger - This almost trivial circuit may be used to charge a pair of AA or AAA sized rechargeable battery cells from sunlight.

4 x 813's RF Amplifier Deck - This amp project was an exercise in cheap! The design criteria was to use only components in the JUNQUE BOX

FT-726 AUDIO Modifications - Throughput improvement for the FT726R - Tapr PSK modem

Repeaters: radio modification page - Modifications for motorola and ericsson radio repeater