high voltage transformer

Portable 70cm Quadruple Quad Beam - A suitable high gain 70cms antenna for SOTA operation was sought that did not have the drawbacks of a long Yagi antenna, principally a narrow beamwidth and bandwidth.

Errante's virtual ground balun - Errante's virtual ground Balun, a state-of-the-art high power HF balun family.

How to Make a Great 9:1 RX Transformer - There are lots of good designs for matching transformers for receiving antennas. Make it yourself it's cheap and easy, and very high performance. This is the design used in the TRX-9 transformers.

Transformer for Ground-Independent Receiving Antennas - Transformers theory and calculator of turns on binocular cores. Comparison with toroid cores.

Beverage transformer notes - Notes on beverage transformers collected by N1EU

Beverage and transformers - Why Beverages need good transformers by VK3APN

From Transmitter to Antenna - A collection of articles on the subject of impedance, impedance matching and high-frequency power transmission by G3YNH

Receive 4 square antenna - N6RK receive 4 square antenna with transformer coupled antennas and true hibrid combiner

Matching Waves, VSWR at work - When the radiation resistance (voltage to current ratio) of an antenna is the same value as the characteristic impedance of the transmission line (voltage to current ratio in the line), all of the electrical energy transmitted down the line is taken by the antenna and radiated into space in the form of a radio wave.

Falling Derrick Method of Tilting Up a Tower - A homemade 16 foot falling derrick to tilt up a 50 foot high, 18 inch wide Glen Martin aluminum tower by N6RK

Te RADAR grou - The RACES ARES Disaster Assistance Repeaters (RADAR) group was formed by a team of amateur radio operators dedicated to providing high quality repeater communications for amateurs involved in public service communications or response to emergency/disaster situations.

HamRadioHelpGroup - This group is dedicated to those who are interested in getting started in amateur radio or upgrading to a higher class license

SES Flexcharge - Ultra High Efficiency Alternative Energy System Controllers

Outbacker antennas - Outbacker mobile and portable antenna systems are slim line, highly efficient, single whip multi bond antennas for vehicular and limited space portable applications.

Filtronetics Inc - Maker of filters, oscillators, cristals Coils, Toroidal Inductions, Solenoids, Bifilar wound Solenoids, Trifilar Solenoids and Transformers Located in Kansas City, Missouri

FMI - FMI provides superior solutions in the design and manufacture of frequency control devices including Voltage Controlled Temperature Compensated Crystal Oscillators (VCTCXO), voltage controlled crystal oscillator (VCXO), Temperature Compensated Crystal Oscillators (TCXO), crystal clock oscillators, high temperature oscillators, surface mount and crystal oscillator products, phase locked sources and more.

High Altitude Ballons

Suntracker: Wayne State University - Suntracker : high altitude, balloons, weather station, stratosphere, solar cells

Treasure Valley Near Space Program - Lighter, cheaper, higher. let's do launch!

UND High-Altitude Balloon Project - University of North Dakota High Altitude Balloon Project

Mobile Installation notes - Some do's don'ts & advice by Brian MW0GKX.

Technology Systems - Supplier of Heathkit documents, full high quality manuals fom NEW manuals, full catalogs all pdf format. Schematics and 1000 pictures

Power Aamps RF voltages - This test circuit is easy to duplicate, and demonstrates the extreme voltages that appear in an amplifier when the load is improper for the amount of drive power applied.

Battery Equivalents - Cross reference thousands of consumer, watch and Amateur Radio Handheld batteries

Microphone Wiring Pin Outs Priority listing - Amateur radio microphone wiring schemes for over 770 radios from 48 manufacturers