tube design

Antenna Basics - Article designed to answer basic questions about antennas

10 elements Yagi for 2 meters - Based on a design by JM1SZY for 50 MHz that he developed using YO

W0KPH EH Antenna tests - Various tests and designs, with photos of home made EH Antennas,simple and networked, and also sone CAN Antennas.

Helix Antenna  ^updated - Design helix antennas with this DOS program by OH0NC

J-pole Design Prg  ^pop - J-pole Design Program V1.1 by WA2ISE

Stacked Yagi Antennas - Constructing and designing full size, single band stacked yagi antenna arrays

Antique Radio Schematics  ^updated - Specializes in antique radio schematics, circuit diagrams and service data for vintage tube radios. Carries information for American, Canadian and European antique radios.

The Boatanchor Classifieds - A free service dedicated to enthusiasts of fine tube gear from Amateur Radio's classic era.

Scanner feed tutorial - This tutorial is designed to help the average person get his scanner feed on the net pdf file

Fractus Antennas - Fractal Antennas are a new generation of multiband antennas for wireless communications. Based on a new design concept, fractal technology.

Valcom Fibreglass Whip Antennas - Manufacturer of Fibreglass Whip Antennas, Low and mediun Frequency, HF and VHF Antennas Specialized in the design and manufacturing of a full range of Beacon (MF), AM Broadcasting 540 - 1700 KHz, HF 1.7 to 30 MHz, VHF 30 to 156 MHz and UHF 200 to 500 MHz antennas.

Fractal Antenna Systems - Solution to your OEM needs and can meet your design or vended antenna requirements for antennas from 400MHz to 10 GHz.

Electron Tubes - Electron tubes and vacuum tubes for industry

Six Meters FAQ - Faqs on six meters band, designed to help encourage hams to use and enjoy this band

The Very Small Array (VSA) - in Tenerife (Canary Islands). Designed to study fluctuations in the Cosmic Microwave Background (CMB) thought to originate from the period immediately following the big bang. Operated by Cambridge and Manchester Universities (UK).

ND2X QRO via Russia - Data about surplus Russian tubes and examples of PA's which use them from HAMs

Ten-Tec Jupiter CW copying and keyboard transmit - Part 2 - Ten-Tec Jupiter CW copying and keyboard transmit

AA Woodcrafts - Amateur radio call sign displays precision cut in wood. Being 18mm thick they are designed to stand on a desk or shelf.

QSLArt - Qsl card design and printing by ik6rum

Ariel 30 - HF wire antenna design program by WB4ZYA for DOS

Discone Antenna Design - Discone antenna deisgn program by K5DKZ

Antenna Log Periodic Design - Log periodic antenna design excel sheet file download, in italian.

Magnetic Loop Designer - Magnetic Loop Antenna Design software by DK1NB

IZ8BLY Stream - Stream is a software that implements MFSK16 and MFSK8 modes designed by me and Murray Greenman ZL1BPU. It also offers a series of experimental modes based on FEC, interleaving and several modulation techniques (PSK, QPSK, MSK).

RX-PSK31 - Easy to use Audio Spectrum and PSK31 decoding program specially designed for SWL's who don't need TX or for anyone who just like to monitor PSK31 or analyse signals. Adjustable DSP and Spectrum settings for audio and frequency spectrum to set for best decoding of PSK31.