signal generator circuit

Simple active antenna - This circuit shows an active antenna that can be used for AM, FM, and shortwave

4 Square Vertical Phased Array - Improve your 80 and 160 meter signal without a Yagi!

Broadband receiving antenna matching - This article addresses the subject of obtaining the best signal transfer from an antenna to the typical 50-ohm receiver input over a wide frequency range, with emphasis on medium-wave (500 – 2000 kHz), encompassing the standard AM broadcast band and the 160-m amateur band.

Polish Callbook - Polish Callbook with search engine, QSL cards, photos and map generator.

University of Hawaii Radio Astronomy - Online receiver streams signals from Jupiter and the sun

Radio Meteors-NASA Alabama - Icom PCR 1000 at NASA Marshall Space Flight Center monitoring meteor signals on 67.3 mhz.live.

Q Signals - Comprehensive Listing of Q Signals

Introduction to MFSK and the MFSK16 - A new weak signal DX mode for Radio Amateurs, employing M-ary FSK, phase continous tones and convolutional coded FEC.

The KM5ES Weak Signal Homepage Priority listing - This website is for amateur radio op's that use VHF/UHF weak signal communication's. Also homepage for the Sidewinders on Two Radio Club or SWOT.

MoonBounce (EME) & Weak Signals - Amateur Radio operation and weak signal detection pages by AF9Y

Douglas T. Smith Editorial Service Priority listing - Digital Signal Processing Technology: Essentials of the Communications Revolution by Doug Smith, KF6DX, ARRL, 2001, ISBN 0-87259-819-5

Voices of Distant Countries - Personal site of Russian DXer Dmitri Mezin. Contains a fresh edition of his Signal bulletin, archive of all previous issues and QSL gallery.

CW Skimmer - Multi-channel CW decoder and analyzer for Windows 98/ME/2000/XP. Simulatneously decode ALL cw signals in the receiver passband - up to 700 signals can be decoded in parallel and extract call sign

LF Analyser - Professional analyser sound signals, scope, spectrum, spectrograph

HF Analyzer - Professional analyser HF signals, work with bandwidth 500Hz....60Mhz, ddc-mode, scope, spectrum

Trimitator - Software for imitation digital radio-signals: ASK, FSK, BPSK, QPSK, variable speed, any frequency

59+ CW  ^pop - Freeware Win32 application can be used for sending CW signal to the transceiver over a COM port or simply listening to Morse code on the speaker. The application is very easy to configure and will allow you to you to add new Morse characters set speed, tone, dash, dot, PTT line delay and other parameters. It is also possible to set shortcuts for call, QTH, name, RST and ANY other QSO field.

Morse Tutor - Morse Tutor is a DOS based program written in C++. It can be used to practice morse code. Various options are available. Morse tutor with Complete Source Code and Binary is available for Download (32KB).

Analyzer2000  ^pop - Superfast analyzer for audio and radio signals

HAMIC - The Ham Intelligent Calculator - HAMIC, is a program designed to simplify a number of calculations commonly used by HAMs. It is designed for the HAM radio hobbyist, but may be useful to others as well. HAMIC has a simple to use, but powerful graphical interface that allows solving simple circuits such as resistors in series or parallel, or more complex circuits such as L networks or T networks. As well, other calculations such as SWR and reactance conversions are supported. Windows shareware.

Eliminate That QRM - reduce or completely eliminate interference from almost any local source whilst leaving the wanted signal relatively unaffected, even though it may be on the same frequency

Electronic symbols - Analog digital symbols, identification of components, units and conversi¥n tables for electronics circuits design

ACWS: Automatic CW Sender by iz7ath - Simple circuit, with a simple push, transmit a memorized Cw messages

Homebrew resources for wireless enthusiasts - PDF resources containing information on low cost ssb,am,cw circuits, which are useful for beginners.

Amateur Radio Repeater Controller - The project requirement is to design the interface to the signal channel elements after the receiver and before the transmitter