voltage reference

Build a HB 4:1 voltage BALUN for 1KW - In depth detail with photos on how to build your own HB 4:1 voltage BALUN that will run 1KW. Inexpensive and fun to build.

VSWR Explained - An interesting article on Voltage Standing Wave Ratio vs Current Standing Wave Ratio by EPARA

Small Tuned Loop AM Broadcast Antenna - Alan yates vk2zay's ham radio website, homebrew construction, general electronics, high voltage experiments, amateur rocketry, and general geek stuff

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.

Irish Lighthouses - lighthouses and lightships of ireland and northern ireland with arlhs reference numbers for all irish lights

SOTA South Africa - Summits on the Air South Africa formed in October 2002 to draw up an Association Reference Manual and compile a list of South African summits that can be activated or contacted for SOTA awards

Passio Radio - Amateur radio reference site in french managed by F4EZC

Douglas: Live Douglas County Sheriff - Douglas County Sheriff dispatch channel

The ElectraSlide Antenna - Modification of the DK3 design by Don Johnson, W6AAQ. No voltage dropping, operates on the full 12 volts. The control switch and the matching toroid are supplied. All you need is a standard 3/8 by 24 thread ballmount, 2 wire sheilded microphone cable for control wiring, and a CB whip cut to resonance.

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.

The Baudot Code - Table that represents programmer's quick reference to the Baudot character set.

Long Wave Radio - The World of LF, by G3YXM reference site for longwave operations. Introduction to operating on 136 and 501 Khz

Understanding propagation numbers - Quick reference table on understanding A K SFI indexes and how can be translated in usable frequency opportunities

YAESU FL-2100Z Amplifier Repairs - The FL-2100Z amplifier referenced in the following images is the 6-Band model covering 10m thru 160m (no WARC bands) and not the 9-Band version that included the WARC bands. Modifications, schematics and manual

Troubleshooting Traps - This article refers mainly to the old Cushcraft 1/4 wavelength AV series of antennas (12AVQ, 14AVQ etc) hence the references to radials. The R series (R5, R7 etc) are 1/2 wavelength antennas, and the radials are NOT 1/4 wavelength resonant.

Yaesu VX-2 at RadioReference - Yet another wiki page about the yaesu VX-2 hand-held transceiver.

Yaesu VX-2R Quick Reference Card - A downloadable free quick reference card for the Yaesu VX-2R in powerpoint and PDF file ready to be printed.

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.

Toroid cross reference - Construction articles in magazines and books often use part numbers of firms no longer in business or whose parts are hard to find. Here you can locate the palomar toroids equivalent

A Power Supply on the Cheap - Need a variable power supply that is short circuit protected and over voltage protected; Here is a good one that can be built cheap by VE3IVJ

DC to DC (12 to 24 V) Voltage Converter - This page describes a DC to DC voltage converter, pretty simple, for currents up to 500 mA by sv1bsx

Small Unregulated Power Supply Project - Here's a simple power supply that can be used in many applications. It is not regulated , so keep that in mind for voltage sensitive devices , and of course you will need to understand how to select the correct amperage and voltage for the AC transformer.

HV power supplies - WV0NNI 2,800 VDC @ 2 Amps Continuous Variac adjusts filament voltage. A voltage doubler circuit, well suited for smaller, compact linear amplifiers.

Tube Reference - Electronic Vacuum Tube Reference Manual & Specifications from the RCA Receiving Tube Manual.

Military VT Tube Cross Reference - Rod's classic & Antique Radios