replacing tubes

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

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.

Ameritron AL-811H tube selection - This article examines the performance of the Ameritron AL-811H amplifier with the supplied 811A tubes and with 572B tubes, and details a procedure for replacement of existing tubes.

AL-811H inside - Ameritron AL-811H Amplifier inside 800 Watt PA modified with 4x 572b tubes

SB-220 Repairs and Modifications - Heathkit SB 220 mods, replacing the Zener ZD1, replacing the plate-voltage voltage divider, adding a keying circuit for solid state transceivers

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.

A New Knob for my K2 - Replacing a new VFO know to elecraft K2

Nuxcom.de - Antenna parts for self construction, especially for VHF and UHF Yagis designed by Martin Steyer, DK7ZB, coax cables, connectors, aluminium tubes-

Sovtube.com - Russian Radio components - Russian Tubes, Capacitors , Resistors , Ferrites Sockets and other components

Globex - Dealer for Russian Tubes, components and other semiconductors

Halfin - Product specialist for semiconductors and electron tubes based in Belgium

Ciel electronique - Online shop for obsolete electronic components, tubes and semi-conductors

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

Antique Radio Tubes - We sell antique radio tubes and antique tube radios We have over a thousand different radio tubes in stock. We also have a large stock of globe tubes.

Antique Radio Tubes - Antique Radio Tubes Sell antique radio tubes, over a thousand different radio tubes in stock

Tubeworld - Source for high quality new old stock vacuum tubes

WVS Technology - RF Tubes shop, capacitos, inductors and more electronic components dealer based in Germany

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

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

Filtering of the Icom IC-775 DSP - Replacing filters on ICOM IC 775

About vacuum power tubes - KK5DR on RF power tubes

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