rf amp circuits

IZ7ATH Projects  ^pop - Antennas, Keyer, amplifier, transverter, baluns

Magnetic Loop antenna  ^pop - Why is an Magnetic Loop antenna so special, this antenna is picking only the magnetic part of the elektro magnetic radio wave. The big advantage of this antenna is that the electric interference from the big city have no influence on the received signal

Whisky Delta - WD Radio Dx Group

1AT172 Franco - Personal page from Livorno Italy

Mt. Airy VHF Radio Club - "Better known as the ""Pack Rats"" W3CCX, Southampton PA"

Amateur Radio Club of Parker County - W5PC is an ARRL Special Services Club, ARES/RACES/SKYWARN in Weatherford, Parker County, TX

SV2BXC Spiros - SV2BXC Personal Amateur radio Web Page

EA7FTR Fran - Manager of ea7ftr ed7ftr an7ftr and stamps collection

HamFind - Search engine dedicated to amateur radio

Antenna Products - Antennas cover the RF spectrum from kilohertz to gigahertz and support countless mission critical military, air-sea navigation, ILS and voice-data communications applications.

Industrial Communication Engineers - RF parts, filters, rf switching products.

MT63 HF mode - MT63 is a DSP based advanced HF mode for Amateur Radio, intended to provide high performance keyboard - to - keyboard conversational operation on HF bands under poor conditions

Digital Signals Sounds - Several files with examples of sounds from digital radio modes on short wave. PSK, RTTY Hellschreiber MFSK FSK Sitor

Hellschreiber beacon project - This web site describes a low power beacon system to be used for propagation and performance tests on the lower bands. The beacon offers CW (on-off keyed) modes and FSK modes; the traditional Morse ID mode, and Feld-Hell, another highly noise immune CW mode.

W5NCD SSTV pages - SSTV interfaces and software, personal stuff and suggestions for sstv novices

Andrews Communications Systems - Australian dealer, HF linear amplifiers, power supplies, baluns, HF UHF yagis and verticals including multiband HF verticals.

Prime Time Shortwave  ^updated Priority listing - The latest shortwave broadcast schedules with listings by time, country and frequency plus a DX program guide.

Frequency Manager - Database system with 60000 frequencies, powerfull 3D MUF/LUF-propagtion software and full copntrol of several receivers

Zakanaka  ^pop - A digital mode decoding and terminal program that uses no terminal unit, terminal node controller, or multimode hardware. It does all its decoding using the sound card inside the computer, and it can interface with a radio using a COM port. Zakanaka is an extremely cost-effective way of operating PSK31 and RTTY

Marine Radio Control - 32-bit radio control program for the ICOM M700PRO, M710 and M710-R NMEA computer interface.

Nova For Windows  ^pop - Real time tracking of an unlimited number of satellites, fast, accurate and easy to use. Automated FTP keps updates. Also support a great number of interface to control rotors azimuth and elevation plus frequency doppler shift.

Conductor Training - Conductor is a training tracking software that can organize any type of education, training, certification or license. It generates a multitude of reports perfect for regualtory bodies, free demo.

100W HF QRO linear amplifier - Based on Motorola MRF454, schematics and component list

SSB and CW Filter - A pdf file with schematics of an ssb and cw filter AF amplifier

RS232 Interface - This simple circuit is intended for older Kenwood radios and was presented in chapter 22 of the ARRL Handbook.