pi calculator

Build A Magnetic Loop  ^{updated  pop} - Documents and schema on how to build a Magnetic Loop Antenna fo 80/30 mtrs

Mast for portable use - Telescopic antenna mast for portable usage by PE1OPM

Portable Loop Antenna  ^pop - This loop it is small and light enough to carry while operating, it disassembles into small but rugged pieces that fit easily in a backpack or gym bag, and it can be tuned from 14 MHz to 30 MHz. This tunable magnetic loop antenna is my contribution to the well established art of amateur loop making. Can be tuned from 14 MHz to 30 MHz.

2.4G Antenna - Pictures of 2.4 Ghz antennas, JN1GKZ S-band homemade antennas

Radio Catalogue and Radiomuseum - More than 80.000 datas of antique radios, pictures and plans. European and US-Radios.

Mississippi Coast Amateur Radio Association - Very active amateur radio organization on the Mississippi Coast. Operating repeater with echolink and much more.

Piedmont Amateur Radio Klub - Office website of the PARK radio club in Halifax, Virginia. Providing emergency communications to Halifax Virginia and surrounding areas.

All about Lightning protection - Thierry LOMBRY, ON4SKY, gives advice to amateurs about lightning protection of an hamshack, including pictures and links.

Integrated Tower Systems-ITS - Premier OEM of portable tower systems, Communication-Site-on-Wheels (COWs), heavy-duty fixed foundation telescopic structures commercial and military, worldwide sales and leasing

How to select an amplifier - Thierry LOMBRY, ON4SKY, develops in three long articles all you need to know about amplification, and how to seletc an HF and a solid-state amplifier, with pictures.

What is DX - Some people say the "D" in DX stands for Distance, and the "X" stands for the unknown, meaning hearing unidentified stations until identified. Read more on meanings of DX in Ham Radio slang.

The History of amateur radio from 900BC to date - Thierry LOMBRY, ON4SKY, develops in depth and with original pictures the long history of amateur radio all through the world from 900 BC to date.

ITU zone map - by QRZ Israel HAM radio portal

Solar Weather - Basic information compiled and copied from NOAA SEC explaining and showing current solar weather conditions affecting amateur radio.

Customized LED Callsign Microphone Pins - Be seen day or night at your local HAMfest or HAMvention with these callsign pins!

Funktechnik Grenz - Online shop for ham radio equipment. Yaesu, Kenwood, Icom, Alinco, Diamond, Power supplies, Antennas, Rotators with world-wide shipping.

Mega Kommunikation - Transceivers, Receivers and some Equipment for Amateur, CB, maritime and aircraft with world wide shipping,

World Pirate radio address list - The Adresses , phonenumbers, snailmail and email adresses of pirate stations worldwide that are active on medium and shortwave

SW pirates webring - The webring that contains lots of links relateed to pirate radio

Smith chart calculator - linSmith is a Smith Charting program, mainly designed for educational use. It allows defining multiple load impedances (different frequencies), and adding components (discrete components and line sections) in series and parallel. It plots the impedances on the screen, shows the values in table format, and is able to generate publication quality Postscript output.

DotDash v1.0 - DotDash is a free morsetrainer for the Palm Pilot with features such as "Train Random Words", "Learn Alphabet", recognize random abbreviations, different speed settings, morse text as you write etc.

FODtrack Satellite Tracking Interface - Construction tips to build an automatic``satellite tracking rotor controller using``PIC16F877 IC.

W7IUV HF Preamplifier - Schematic and pictures of a W7IUV preamplifier

Garex VHF preamp - It is available for spot frequencies in the range 40 - 250MHz, where a typical gain of 26dB can be achieved

Regenerative Radio Receiver Circuit - Useful and well thought out regenerative receiver design