over tone

QM7 7 elements 144 MHz Yagi-Uda Antenna - The QM7 antenna is a simple 7 elements Yagi with 3.70 m boom length for the lower 144 MHz SSB/MGM band, used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/R is about 12.5 dB

Transmission Lines - Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.

Travel loop antennas Priority listing - PA11019 Travel loop antennas, these antennas cover 6.300 to 29.200 mHz , handle 35 Watts and have a packing size of 43 cm, ideal for fieldwork, or mobile operations.

Half square antenna - The elevated half square antenna is a very simple antenna that can be constructed from common materials yet gives significant improvement over a dipole at the same elevation. Ground mounted versions of this antenna are commonly used in amateur radio for 75/80 and 160 meter bands

GDXF - German DX Foundation - The German DX Foundation (GDXF), founded in 1996, was established to support HF DX activities - on all bands or modes - to rare countries all over the world

GI3XRQ Bangor and District Amateur Radio Society - Originally formed over 30 years ago in the seaside town of Bangor, County Down, Northern Ireland

Ak-Sar-Ben Amateur Radio Club - The Ak-Sar-Ben Amateur Radio Club, Inc. of Omaha, Nebraska is a general interest amateur radio club. With nearly 300 members there is someone involved in every aspect of amateur radio. We make a special effort to participate in providing communications support for public service events, Field Day, and teaching classes for those who wish to obtain an amateur(ham) radio license or upgrade their license privileges. The club sponsors regularly scheduled Volunteer Examiners as part of the ARRL VEC program. The club also hosts a flea market in the fall and hosts an all area picnic in the spring. There is evidence of the club as far back as the 1920s and has a long history of community service and promotion of ham radio in the city, county and state. The current club was started in 1945 the club has been affiliated with the ARRL since that time The club has hosted the Midwest Division Convention in 1985 and in 1994. Tthe club has participated in Kidz Explore in Omaha which is attended by over 77,000 people. The AARC is also involved with the radio merit badge program for the Boy Scouts with several members being registered merit badge councilors. The club operates two repeaters under their KØUSA callsign, 146.940 and 224.940. Both repeaters are open for all licensed amateurs to use. The 146.940 repeater is home to Midlands ARES and Douglas County ARES nets.

Digital Smart Antennas DiSA - Digital Smart antenna (DiSA) Automatically Adjusts over a wide band of frequencies.

The One Man Tower - Complete tower system incorporates rotator mount, and lateral support collars. You never have to climb again - and forget the hassle of tilting over to work on large arrays. The "One Man Tower" is the strongest dmall footprint free standing self erecting tower in the world

NI4CE Repeater System Online Stream - Listen to NI4CE when you're outside the coverage of the network.

Handbook on grounding - U.S. Government's military handbook on grounding in pdf format

Cables Etc. - Electronic Parts for HAM Radio Operator's and Electronic Hobbists. Amateur radio parts and components. Electronic Parts Distributor accept VISA, DisCover, and MasterCard.

Vacuum Tubes Radio - Vacuum Tubes and Radio Tubes Our specialty. We carry over 5,000 radio and vacuum tubes in stock every day and we ship world wide. Tubes for industry, music, ham radio, the audiophile.

Voice of Kampuchea Krom - Khmer radio broadcasting weekly on the net covering news, politics and music to entertain

Sawt Lubnan Al-Houriya - Daily updated news on events in Lebanon and the MEA. Official web site of the FPM (Tayyar watani Horr) a lebanese political group lead by General Michel Aoun, working for a free and sovereign Lebanon

Kurdistan Regional Government - News, progress reports, reference material and cultural features from the The Kurdistan Regional Goverment

Radio Cochiguaz - Radio Cochiguaz is a broadcasting station which began its activities when Cachito Mamani, fascinated by broadcasts of pirate radios he had picked up being transmitted by other colleagues, commented to a group of his friends on an idea he had been mulling over.

Covert Comms Archive - Covert Comms was a monthly column wrote for the ACE newsletter from 1997 to 2002. The column was devoted to numbers stations, unidentified signals, intelligence information, and other related information

CQiNet, linking Ham Radio - CQiNet is a family of programs that combine Ham Radio with the Internet using Voice over IP (VoIP) technology. Two programs are currently in the family, "theBridge" and echoLinux. Thebridge is a iLink/EchoLink compatable conference bridge that runs under various versions of Unix as well as Windows. EchoLinux is a EchoLink client program for the Linux operating system.

CW Decoder  ^pop - This program allows CW operators to copy CW code with a computer. The decoded CW is displayed as text or can generate a side tone. There is a spectrum display of the audio with a sliding cursor to select a particular audio for decoding. The program also allows for keying a transmitter from the keyboard with full CW break-in operation.

FlyOver - FlyOver predicts satellite fly-over times and helps you spot it. FlyOver uses the same kind of equations that NORAD uses, so it's extremely accurate, too

Satpro - SATPRO is an earth satellite tracking software package for the IBM-PC and compatible class of microcomputers running MS-DOS. The forte' of SATPRO over other software packages is the accuracy of ephemerides produced and the number of simultaneous propagations that can be accomplished

0sxsat - On the Satellitenprogram of DJ0SX Peter one can provide time schedules for over 500 satellites or count 23 satellites real-time imTextmode. The large advantage exists in thought out and of long observation practice which are due flexibility in the selection and the requirements to a satellite program. The program runs under Windows 95/98, NT, XP, 2000. ( German ) ...On the Satellitenprogram of DJ0SX Peter one can provide time schedules for over 500 satellites or count 23 satellites real-time imTextmode. The large advantage exists in thought out and of long observation practice which are due flexibility in the selection and the requirements to a satellite program. The program runs under Windows 95/98, NT, XP, 2000. ( German ) ...On the Satellitenprogram of DJ0SX Peter one can provide time schedules for over 500 satellites or count 23 satellites real-time imTextmode. The large advantage exists in thought out and of long observation practice which are due flexibility in the selection and the requirements to a satellite program. The program runs under Windows 95/98, NT, XP, 2000. ( German )

TCube - TCUBE is a combination of a Spectrum Analyzer and a Two Tone Generator, with optional quadrature outputs. It can be used for measuring the intermodulation behavior of an audio circuit, and as a general purpose tool

Why grounding - Overvoltage protection, Voltage stabilization, Grounding in wiring, Ground wire resistance