vacuum tube

DK7ZB Moxon Antennas - DK7ZB- Moxons with Aluminium Tubes, plans for moxon antenna for 6 10 12 15 meters

Sparkmuseum - Vintage radio and scientific apparatus by john jenkins, include antique radios, Horn Loudspeakers, Vacuum Tubes, A.C. Receivers

Variacs - Variable Autotransformer - Use these Variac auto transformers for specific application requirements that include, but are not limited to, home coffee roasting, tube amps, and more.

California Tube Laboratory - CTL designs and manufactures a wide range of high-power pulse and CW magnetrons, and provides cost-effective magnetron rebuild services for commercial, industrial and defense users.

Triton ETD - Traveling Wave Tubes , Conventional Traveling Wave Tubes, Microwave Power Modules manufacturer

Tubes.ru - specialize in trading Russian vacuum tubes used in broadcasting, amateur radio, Hi-Fi audio, meteorology, communication, medical applications and industr

Penta Laboratories - Penta Laboratories is a Manufacturer and Distributor of Vacuum Tubes, Capacitors and Electron Tubes for Broadcast, Industrial, Marine, Medical, and Avionics applications worldwide.

AMTOR demonstration - Youtube video by PR7VX using AMTOR to test performance

Ameritron AL-1500 modification - Adding a second 3CX1500A7 tube to the Ameritron AL 1500 power amplifier

Yaesu FL2100Z operating tips - The Yaesu FL2100Z is a HF linear amplifier rated for 1200W PEP input, and using two 572B triode tubes. This article explores the recommended operating conditions, and alternatives.

Elecraft KX3 and iPad - How To Connect Elecraft KX3 To iPad

TS-690S Mars Modification - Kenwood TS-450S/TS-690S MARS modification video

Yaesu FT-920 video review - Yaesu FT920 youtube review by Roy Sargon ZL1LK

Baofeng UV-3R Menus - Video on Baofeng uv-3r menus

Viking Vintage - Restored vintage amateur radio, shortwave & other electronics from the vacuum tube era! Specialists in restored Ham Radio boatanchors

Metal Depot - US based aluminim supplier, a supplier of aluminum, and stainless steel rods, tubes, and bars useful for antenna parts

How to select a tube HF amplifier - Excellent article and guide to choose the best RF power amplifier that fit your needs by ON4SKY

Homebrew a 3 Tube GI-7B-T HF Amplifier - Build a 3 tube, GI-7B-T amplifier using an old prototype box that was meant for 4, 572-B

4-1000A Tube RF Amplifier - Home Brew a 4-1000A RF power amplifier project by W4NFR

GS-35B Tube Amp - 160-10 Meters 1500 Watt Amp - W4NFR

Selecting the Right Tube - Selecting a tube around which to build a linear amplifier.

Youtube K0BAM antenna launcher - Trying out the pneumatic antenna launcher

The EMI - RFI page - Article on radio frequency interferences, with a long list of common RFI cause, like Plasma TV, Solar panels inverters, fluorescent tube lamps.

A 12-Volt Homebrew Regen - A one-tube battery-powered regenerative receiver.

Arcing or Gassy 572B Tube - Common problems of the 572B tubes often used in many RF Power Amplifiers