coverage module

160m Helical Project - An helical antenna for 160 meters band by G0THS

Superphaser-2 Phasing Unit - The Superphaser-2 is an antenna phasing unit based on the PSA-A Phase Shift Amplifier module

Distributed Antenna System DAS - Distributed Antenna Systems technology used for gaining better coverage and using a lower power.

144 MHz Halo Antenna - This halo antenna was built to have an omnidirectional coverage while working in VHF contests.

Homebrew traps - Traps can be one way round multiband coverage without the need of an atu. Learn how to homebrew your own traps

G4FON Magnetic Loop Antenna - A simple multi-band magnetic loop antenna designed for 20, 30 and 40 metres, but by changing the overall length of the wire coverage of other bands is feasible

160m DX Mobile Aerial - M0VEY 160 m DX mobile antenna

CARLA Repeater Network - C.A.R.L.A. is a growing network of repeaters providing coverage across Northern & Central California and Western Nevada. It is intended to be used as a reliable communications resource during significant local, regional and wide area incidents, and is open to all licensed amateur radio operators

K2JJI Tryon Amateur Radio Club - Listen to the K2JJI repeater (146.70- PL 100.00 Hz) located on Fulton Co. NY. Coverage of grids near and around FN23/FN22.

Power Film Solar - PowerFilm, Inc. develops and manufactures thin, flexible solar modules for OEM, military and consumer needs.

Starman Electric - Starman Electric manufactures DataBridge wireless RF modem modules for easy point-to-point wireless data transmission of analog, digital, and serial RS232 UART signals.

Cobham Microwave Priority listing - Cobham Microwave has a long term experience in Microwave Systems and Components. Their five areas of capabilities are Systems and Components: Diodes & Modules, Ferrite Devices, RF Filters, and Waveguides.

PM-SDR - A new SDR-receiver from the italian SDR developers community. Low-cost, DDS-less Software Defined Radio full coverage receiver for all HF bands, used with powerful software on the PC for multi-mode operation

Triton ETD - Traveling Wave Tubes , Conventional Traveling Wave Tubes, Microwave Power Modules manufacturer

Audio CW Filter - A very effective AF Adaptor, with built-in noise blanker and 30 Hz CW filter modules by PA0LQ

Kenwood TM-241 Repair - 5 probelems repaired on the TM-241

Repairing the TM-241 Toshiba S-AV17 - Used in the Kenwood TM-241, TM-741 2m module by W3KKC

Cloud RF for Android - SPLAT! VHF-UHF planning on Android

RYTelnet - MacOS free DXCluster telnet access client in spanish and english

Radio Works - RadioWORKS is a tool for calculating various items related to radio waves and radio wave propagation. Get detailed information about a frequency, such as the free-space wavelength, band classification, propagation methods, common transmitter configurations, etc. Calculate antenna lengths or frequencies. View a 3D coverage map by providing a latitude / longitude coordinate and transmitter height.

Drupal Ham Radio Module - Import ADIF logbook , Display and search logbook, Display and statistics

20 Watts PA VHF Module - Modification of the MHW 612 by Motorola for the two meter band by sv1bsx

137.7kHz QRSS on one chip - This article describes a simple QRSS beacon exciter for the DX portion of the 2200m amateur band.

A CW QRP Transceiver for 20 m band - The little QRP presented in this article may be built in a gradual manner, it is divided in two main modules (plus VFO), you may also complete only a single part (RX or TX module).

Radio Programming Interface - This article describes a generalised unit for interfacing a transceiver's TTL/CMOS interface to RS-232.