811 vs. 572 tubes

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

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.

10/12 meter Mod for Ameritron 811 - 10 meter modification for the Ameritron AL-811 and AL-811H amplifier. This mod apply to other Ameritron AL Series RF amplifiers and allow extension to 10 and 12 meters band.

Ameritron AL-811 Product Reviews - eHam reviews for the Ameritron AL-811 linear amplifier

Ameritron AL-811H Reviews - eHam reviews of the Ameritron AL-811H HF power amplifiers

Ameritron Al-811H demo by K1OIK - Demonstrating tuning and operation of the ameritron al-811h in this Youtube video

Ameritron AL-811H by EA2ID - Ea2id demonstration video of the Ameritron AL-811H in spanish

Tuning Ameritron AL-811 - Discussion on how properly drive and tune athe Ameritron AL-811 power amplifier

Ameritron AL-811H Manual - Ameritron 811H PDF File manual

Ameritron AL-811H Tuning - Ameritron Al-811H Tuning for Power/Dissipation/Linearity, and More Generally 811A Tube Amps in Grounded Grid

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

AL-811 10 mt mod pictures - Pictures of the Ameritron AL-811 modification for 10 meter band extension by km5ps

High SWR after AL-811 10 Meter mod - Very High SWR with the 10M Mod to Ameritron AL-811 amplifier

Ameritron AL811 AL811H information - AL-811 and AL-811H specifications and information about this 600-800 Watt ham radio ower amplifiers

AL-811 QSK and Keying interface mod - QSK and Keying interface Modification for the Ameritron AL-811H Based on Phil Salas ALS-600 QSK Mod.

K3 vs IC-781 vs TS-850 - Elecraft K3 vs. ICOM IC-781 vs. Kenwood TS-850: comparative Measurements and Experience

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

Tubeworld - Source for high quality new old stock vacuum tubes

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.