40 metre

300 ohm twinlead 40 meter dipole - The N2CKH travel special 300 Ohm ladder line convertable antenna

A 40m Vertical - This antenna is intended as a simple, inexpensive solution for the newcomer to experiment across the 40m band (7.0–7.2MHz) when only restricted space is available

80M Vertical antenna with capacitance hat  ^pop - Simple wire antenna cheap to make, using readily available materials, Low angle radiation, with rejection of high angle signals Wide bandwidth, with resonance at the 80M DX window (3.790-3.800 MHz); and Maximum height is 40 feet

Luisteramateur NL-10145 EH Antenna - Calculate EH Antenna, 20m 40 80m. Fotos, Original eh antenna building.

Wireman-J-Poles for 2m-40m  ^{updated  pop} - J-Poles with Wireman-cables for the quarterwave matching section

A $20 HF mobile antenna - A few hours of fun with PVC and wire and you’ve got yourself a respectable road radiator. The antenna consists of little more than some PVC pipe topped by a RadioShack replacement whip antenna and a couple of coils made from a small roll of #14 house wire.

HF portable antenna - 40 to 6 meters  ^pop - Phil Salas AD5X 40 through 6 meter HF portable multiband antenna, construction article, plans, and photos

Modified Buddipole for 40 to 10 Meters - This is modified version of buddipole antenna, using vertical wires instead of telescopic ends by ks7j

Link Coupled Tuner - Legal Limit Link Coupled Balanced Tuner,for the amateur ham radio HF bands. This Tuner uses plug-in Coils sets for 40, 80, & 160 meters

IK-STIC 2 vertical multiband antenna - The IK-STIC 2 is a vertical, all band, antenna that is over 25 feet tall yet weighs under 5 pounds. Based on a telescopic pipe or a fiberglass fishing pole, using a tuner it can easily cover the amateur radio HF bands from 40 - 10 Meters

A low cost fishing pole vertical antenna  ^pop - This antenna is based on a 10 Metre long fibreglass fishing pole, by G4AON

NorCal Doublet Antenna - A simple antenna that can be erected very fast, only need one center support, and do not take up much storage room. Works from 40 to 10 meters band

Russian Callsign database - Russians Ham on-line lookup database. Search and create new callsign records. The most full russian and CIS callsign database (more 50,000 CIS records). More than 1,400,000 international calls.

VK1AA - Ham radio BLOG - QSL information for AX1AA VK1AA/M VK1AA/2 VK1AA/4 VK9LX VK9LX/MM VK9LX/9 H44XX H40XX

K6RF Streaming Video - Live video and audio feed from K6RF ex K6DXC radio shack. Audio is from either the FT-920, FT-817 receivers or a microphone. Video is from a Logitech Pro-4000 Webcam

RACOM - Radio modems - RACOM is a Czech company specialized in design and production of radio modems and other devices for wireless data networks for radio channels from 140 to 900 MHz. RACOM radio data networks are suitable for data transfer in telemetry & SCADA applications, transaction networks, security systems, IP networks and firts of all mobile tracking and fleet management.

SoftRock-40 - The SoftRock-40 is a small, low-cost, good-performing "software defined radio" receiver that plugs into a computer USB port and delivers I-Q audio signals to the computer's sound card. It was designed by Tony Parks, KB9YIG and Bill Tracey, KD5TFD as an "SDR sampler project" for hams everywhere to easily try out software defined radio.

Yaesu FT 857 specifications - Yaesu FT 857 technical details and pictures

Yaesu VX-150 mods - Expanded Transmit for the Vertex VX-110 & VX-150 and MARS/CAP modification for VX-150R 140-174 MHz

Icom V8000 mobile amateur transceiver - Universal radio IC-V8000 page includes accessories and photos

Recycled Equipment Company - Recycled Equipment Company buys and sells quality used electronic test equipment.Over 40,000 square feet of inventory. Dealers in used electronic test equipment since 1993.

Rocky Software for SoftRock40 - SDR software for SoftRock40 freeware by Alex VE3NEA

3 x 4-400A project - An RF amplifier project by W7IUV

New Developments with PLC in Japan - The Japan Amateur Radio League (JARL) is cautiously watching new developments concerning the commercialization of Power Line Communications (PLC), while continuing to carry out joint experiments with a high speed power line communication promoters' alliance to reduce potential interference to radio communications.

Bbc new: home network on electricity wires