pi calculator

QM5 Yagi for 2 meters band - The QM5 antenna is a simple 5 elements Yagi with 1.88 m boom length for the lower 144 MHz SSB/MGM band, I used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 9.17 dBd; i.e. 11.3 dB forward gain over the isotropic radiator, while the F/R is about 11.5 dB. Elements

Coaxial Balun  ^pop - Coaxial balun plan by I0QM

Cheap antenna to make from 160m - 6m  ^pop - The antenna is nothing more than a simple 2.4 metre square loop drawing pinned to the internal brick wall of the spare bedroom. Yep, thats right, the inside wall of the spare bedroom - ideal for flat dwellers, hotel rooms or whinging neighbours, The loop has a simple switched inductance at the top of the square loop and uses a simple coaxial stub to tune the antenna. An additional variable capacitor placed across the feedpoint can be used to fine tune the resonance of the antenna, by Andy G0FTD

OH2U Contest Station - This is multi multi radio amateur contest station oh2u which have won three european champions

WB4WOR Propagation Beacons - WB4WOR Propagation Beacon on 6 and 10 meters Jointly Owned and Operated by the Broadcast Packet and Repeater Group and Piedmont Amateur Radio GroupRandleman, NC USA

NEPAL DX - DX pedition to Nepal

HE9PIA Hermann - WebPage of HE9PIA, SWL in HB, OP: Hermann J.

Pipo Communications - The highest-quality and most reliable Dual-Tone Multi frequency encoders.

Otto Engineering - OTTO Communications designs and manufactures audio accessories for two-way radios used in public safety, police, fire, retail, hospitality manufacturing and other markets.

CES Wireless Technologies - CES Wireless Technologies manufacturer of Mobile information Systems including Dispatch and Mapping Software, GPS, AVL, Mobile Data Display Terminals, ANI, CTCSS, and Microphones

Alfa Radio Ltd. - Makers of the AlfaSpid RAS and RAK Rotators

Greenstone USA Priority listing - Manufacturer & distributor of vacuum tubes for all applications, we guarantee best service,pricing & delivery and we also guarantee sameday shipping.

Split Operations - When and How - When do you need to go to a split operation ? When the people you are giving reports to are not answering, or when you are not getting your report from the station you are working because of other stations who are continuously calling.

Travel.State.Gov - Largely US based information on travel warnings, US Embassy info, Lists of Doctors/hospitals overseas, passport info, and general travel tips etc.

200W 136 kHz transmitter - A transmitter project for the 136 kHz band by IK2PII

Mixed-Mode Operation on Voice Repeaters - Mixed-mode operation, where voice and digital transmissions are used in turn on the same frequency

WA2RQY manuals for sale - List of copies of original equipment manuals

Pacific Coast Parts - ALPINE * AMANA * CASIO * CASIO-PHONEMATE * CLARION DENON * FISHER * HITACHI * KENWOOD * MENUMASTER PANASONIC * QUASAR * TECHNICS * TOSHIBA * SANYO

Sparkys cb shack - CB and 10 Meter Amateur Radio Sales and Service. Free Custom Tuning. Free Shipping. Home of the Sparktune Modulator. Give your radio that Blazing Modulation We stock Galaxy, Cobra, magnum, Connex, General,Uniden, Workman, Dosy, Hustler, Turner

Radio for Peace International - Radio for Peace International (RFPI) is a Global Community Radio Station located in Costa Rica, Central America that broadcasts progressive news on shortwave radio and the internet on topics of Peace, Human Rights and the Environment. RFPI gives a voice to the voiceless by promoting democratic communication.

Radio Pirania - Pirate statio based in chile transmitting on 48 meters band

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.

JRRI Jolly Roger - free radio station, we are classed as pirates of the airwaves, because we do not have a licence to broadcast on short wave.

AFU Knoppix - The AFU Knoppix CD contains software for the operating modes of PSK31, RTTY, SSTV, FAX, APRS and packet radio. Additional applications for Sat tracking, logging, locator referencing and antenna computation are also included. The CD is targeted for radio enthusiasts, the Linux operating system and the applications on this CD are structured so that they can run from the CD without effecting the installed existing system software. *

Coaxial Cable & Power Handling - This calculator can be used to estimate the attenuation (dB loss), power handling capability, and transmission efficiency for some of the more popular Wireless Communications and MIL Spec cables at the frequency of interest