system analyzer

OH2GI Ham System - All-mode contesting and logging software system designed primarily for on-line operation of HF digital and CW radio stations through Terminal Node Controllers (TNC)

The National Traffic System - ARRL National Traffic System for routing formal written message traffic

MARS - The Metropolitan Amateur Repeater System

QTH.COM Ham Radio Classifieds - Large on-line ham radio classified ad system, free for all users.

MARS Antennas - MARS, Israel's Antenna and RF System manufacturer, flat antennas for cellular, military broadband, multiband MF high power antenna

Q-PAR Microwave Antennas - The company (founded in 1973) excels in the research, design, development and manufacture of microwave antenna systems & components. Our range includes horn, reflector, sinuous, spiral, LPDA, helical antennas, etc; antenna positioners, and many bespoke components.

Andrew Corporation - Communications products, communication systems products, fiber optic cables, global messaging service, gyroscope and navigation systems

NSI-N Systems, Inc. - Triple-band (2-2.5 GHz, 6.5-7 GHz, 12-13 GHz) central receive systems with automatic airborne tracking.

Link Communications - Repeater and linking control systems

FF Systems - manufactures and sells repeater controller products and accessories

Pacific Research Solutions - Repeater Controllers, Repeater Tone Panels, Telephone Interface, Remote Monitoring Systems, Process Control and TDS Monitors

Connect System - Controllers and Telephone interconnects.

Heights Tower Systems  ^pop - Telescopic towers, platforms and accessories

Ritron - Vhf Ufh transceivers, repeaters, Telemetry Scada Systems and accessories

Olivia Modes - Olivia is a family of MFSK modes with a high redundancy Forward Error Correction system similar to MT63. General description and protocol information by w1hkj

KG4YZY / N4SCF Repeater System - Information and a photo album of the KG4YZY 146.760mhz and N4SCF 442.650mhz repeaters in New Port Richey, FL. System is linked 24/7 into the NI4CE regional system. Online streaming & echolink online.

National Weather Service - Some little known facts about the NOAA Weather Radio system

Antenna Systems & Supplies - Antennas, cables, Grounding Equipment, shelters and towers.

Elmer - Macintosh shareware, contains the full pool of questions for each of the five exams, and creates sample tests that will vary each time you take them and it will grade your exam.

Macintosh SSTV Shareware  ^updated - SSTV software is now available for the Macintosh computers, for the first time.

Audiocoreder - Audiocorder is a VOX program which allows your Macintosh to act as an audio recorder

Ipmulse Systems - Impulse Systems offers several innovating products: F6FBB Language Editor and WinPack CoDec

AREPS propagation programs - Collection of various propagation software by Space and Naval Warfare Systems Center, San Diego, Atmospheric Propagation Branch

Spectrogram  ^pop - Shareware dual channel audio spectrum analyzer for Windows 2000/XP which can provide either a scrolling time-frequency display or a spectrum analyzer scope display in real time for any sound source connected to your sound card. Can be used for MTHELL, QRSS and DFCW by R S Horne

EMI Calculator - Does your Amateur Radio system comply to the EMI rules ? (German values implemented)