lf receiver

21 mhz half wave GP Antenna  ^updated - 21 mhz half wave ant -very low radiation angle - full size and light weight- all coax matching system - decoupling care to prevent low angle radiation degrade

A Reduced Half- sloper for 160 meters - A half sloper antenna for 160 meter band Italian translation of a WD8DSB article appeared in a QST issue during 1998.

The 160M Homebrew Vertical - The 160M "No Excuses" Homebrew Vertical is a 27 ft. vertical antenna, made from three 10 ft. PVC sections bolted together, and half wavelength of antenna wire helically wound around the PVC sections by K6MM

40-80 Half-Extended Double Zepp Antenna - A dual-bander for 80M and 40m. An Extended Double Zepp (EDZ) is a 5/4 wavelength center-fed dipole. This article will introduce the Half-Extended Double Zepp (HEDZ) which has characteristics that a lot of amateur radio operators should find quite interesting

Vertical half-wave aerials for 4m - Practical designs pictures and alternative design of antennas for 70 Mhz by Ross Wilkinson G0WJR

50MHz Power Splitters - Splitting an antenna between two receivers or in use as the phasing harness in stacked antennas where there is a need to equally split the power from the transmitter between two antennas

Antenna Gain Comparison System - This device goal is to optimize homebrew antenna for the V/UHF band. This tool, is based itself on the simultaneously comparison between two antenna, directly in dB. by IK0BDO

Advanced active VLF Loop - Article on using loop antenna in very low frequencies

Magnetic Loop Antenna - Although a magnetic loop antenna(aka small loop antenna) is very compact, its efficiency is close to a half-wavelength dipole if carefully built.

K-FACTOR Table & Chart  ^updated - Determine the K-Factor used as a multiplier when constructing half-wave antennas.

Alford 1.2 Ghz ATV Antenna - Antenna tests on Alford 1.2 Ghz for ATV oprations in italian

TLF Contest Log - A GPL console mode (ip-) networked logging and contest program for hamradio under LINUX

9W2VVH (EX-9W6VH) - About my self, family & the exciting of amateur radio.

AOR U.S.A., INC. - Aor u.s.a web site, manufacturer of base and mobile receivers, handheld receivers, digital voice modems, spectrum display units, frequency monitors and antennas

CommsAudit - Commsaudit uk, i/q quadrature , hf receivers, rf, multicoupler, multicouplers, switch matrix, antenna matrices, masthead amplifier,, vhf receiver, uhf,

Gateway Electronics - Amateur radio kits, cw keyers, vhf mini receivers, 2 meter preamplifier and more audio related kits, based in St. louis, Mo and San diego, ca USA

Ideas and Projects for QRP - The free pdf book is a compilation of articles congenial to QRP published on 2003- 2005 years at free e- magazine AntenTop. 17 Mb pdf file.

Quad - from Tonne Software - This graphics-intensive program designs and analyzes active quadrature ("90-degree") networks for use in SSB transmitters and receivers.

HAM-LOG by HB9CQV - This program is freeware for ham radio purpose only, multilingual german and english, self running, runs also from USB devices

Grafik Packet - Windows Packet radio program by DH1DAE, Ulf, versions available for win 95/98, dos and os/2

CwGet PPC Priority listing - A program to decode Morse code via sound input of PDA to text. No additional hardware required - your need only receiver and PDA with sound input. Built-in microphone of device can be used also.

EasyTuner - Easytuner id an excel spreadsheet that tunes your radio. Works with all Kenwood and Icom receivers and transceivers that are computer-controllable. Sets receiver and transmitter frequency and mode

CallSign Software - HamStationExtreme, hamradiostation and scopestation makers. CallSign Software provides a variety of Radio Control Packages to drive ICOM, Elecraft, and Ten-Tec's latest DSP based Transceivers and Receivers.

ATPDEC - Atpdec is an open source program that decodes images transmitted by POES NOAA weather satellite series. These satellites transmit continuously, among other things, medium resolution images of the earth on 137Mhz. These transmissions could be easily received with an inexpensive antenna and dedicated receiver. For more information about receiving POES satellite images consult the rig site.

A regenerative receiver with 6SN7GT - Circuit to build a regenerative receiver