811 vs. 572 tubes

10m Aluminium Moxon Construction - Building a moxon antenna with aluminium tubes

80/160 Dual band vertical - This 80/160 meter antenna is constructed from six 12 foot aluminum tubes to form a slip-up mast antenna some 60 feet high by K0RWU

The G4ZU Bird Yagi - Interesting variant on the 3-element Yagi. Lightweight fiberglass (or similar) tubes supporting a wire structure of elements

Tube Tester Manuals

Michelle Troutman Electronics - Sams Manuals and Manufacturers' Service Manuals Sams from the early 1950s through late 1970s; various service manuals for brand name equipment from the 1950s to 1991. NOS Vacuum Tubes A price list of over 1100 tubes.

Adrian's British - A site mainly concerning British Portable Valve Radios of the 1950's

Fun With Tubes - A noncommercial site operated by Max Robinson and dedicated to passing on and preserving knowledge of vacuum tube circuits and techniques.

Tubes 201 - How Vacuum Tubes Really Work

M.V.S.Z AO Svetlana - Audio hi-end tubes for amplifier

The Tube Exchange - Buy, sell, trade vacuum tubes

The WiWi Tubes Home Page

Micronetics Ltd - Electron tubes/valvs NOS & new production.

The Cathode Ray Tube site - Collecting and history of CRT tubes and physics instruments

Pacific T.V. Online Tube Catalog - Vacuum tubes and sockets for radio, audio and amateur use. Over 1500 types, online schematics and technical data

RadioActivity: Radio Repair - Radioactivity. radio repair, services, and warranty on 1920's - 1960 radios. New and used tubes.

Aircraft Spruce and Specialty - Offer Aluminium tubes for antenna parts

Pierce Aluminum - Distributor of aluminum and a manufacturer of finished aluminum products. Pierce Aluminum offers a diverse inventory and distributes a complete line of sheets, coils, plates, bars, structural shapes, tubes, pipes and extrusions in the most varied alloys and sizes possible

Ameritron AL-811 manual - Ameritron AL-811 owner's manual pdf file

Yaesu.com FT-847 Product page - Current Yaesu product page for FT-847

The Tube Center - Supplying over 2000 different vacuum tube types, valves, grid caps, sockets and capacitors. It is easy for Antique collectors, Ham radio operators, audio enthusiasts, broadcast enthusiasts and amateur radio hobbyists to buy, sell and trade vacuum tubes, electron tubes, audio tubes, valves, grid caps, sockets and capacitors

ABCVacuumTubes.com - ABC Vacuum Tubes is dedicated to providing Ham radio, amateur radio operators, antique radio enthusiasts, audio professionals and hobbyists the ability to choose from an inventory of over 3.5 Million Vacuum Tubes on hand under one roof.

Yagi-logper - Yagi-logper is a linux GPL program to model a Yagi or Log-periodic antennas with horizontal cylindrical dipoles.

SWR vs. Loss - Table of power loss to SWR relation

High Voltage Breakdown Tester - K8CU technical topics article about high voltage breakdown tester necessary for testing of any high voltage components like vacuum tubes, high voltage capacitors, vacuum relay

Vacuum Tube Software - The VTDATA software package is a complete vacuum tube manual on your computer. It has all the information you'd expect in a tube manual. VTDATA's database also includes vacuum tubes of historical interest, such as the early "two digit" types (45, 80, etc.) and hi-fi audio types.