super regenerative tub

AA3RL Transmission Line Calculator  ^updated - Excel spreasheet that calculate virtually every transmission line parameter that one may need. Include Length conversions, Reactance and Length of Stubs

Stone Vintage Radio - Antique Radios, Wireless, Crystal Sets, Tubes, and Valves - Stone vintage radio describes early radio from marconi to the 1960s. its covers antique radio, wireless, tubes, valves, crystal sets, and battery radios. included in the virtual museum are hundreds of pictures, images, and descriptions of antique radios, articles, faq, sell, and buy a radio.

Oldradios.co.nz - A new zealand radio servicemans personal tribute to old 'boatanchor' valve communications receivers, dx listening posts of the 1950's, early radio literature, vacuum tube (valves) collection, early tube testers, unusual

Antique Radio Page - The antique radio page is the best place to start if you want to learn about antique radios. this award-winning site features a huge image gallery with hundreds of antique radios (tube, transistor, and crystal sets), useful articles, reviews of out-of-print radio reference books, and the amazing arp directory where you can search and find antique radios on the web!

C&H Distributing - A stocking electronics distributor. Electronic tubes, military components, asset recovery program, coax and connectors

Tube Tester Manuals

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.

Radiotiques - Preservation and Restoration of Antique Tube Radios

Jim's Crosley Antique Radio Page - A web site dedicated to collecting and restoring antique crosley tube raidos. pictures and descriptions of antique crosley tube radios from the twentiew, thirties, forties, and fifties. radio advertising from the twenties, thirties, forties, and fifties. tube box art. links to many antique radio related sites.

Tom's Radio Collection - Tube and transistor radio collection

The TubeBug - This site is dedicated to collecting and restoring older professional receivers and transmitters.

Sal's Antique Radio's - This site is dedicated to the fixing up and restoring old tube radios.

Vacuum Tube (Electronic Valve) Museum - Vacuum tube museum 1910 to 1960 with pictures and notes.

Tubes 201 - How Vacuum Tubes Really Work

Antique Radio Schematics and Capacitors for Tube Radios - Specializes in antique radio schematics and capacitors. carries antique radio schematic diagrams and electronic circuit service information for american, canadian and european antique radios.

Canadian Antique Radios Schematics Diagrams Service - We specialize in canadian antique radio schematics for vintage tube radios made in canada. we carry lots of factory electronic circuit schematic diagrams as well as all rcc / radio college of canada service data 1920's - 70's.

HA1YA Mechanics & Electronics Inc. - Specializes in manufacture of middle and high power RF decks and high quality linear amplifiers with metall ceramic tubes for HF, 6m, 2m and 70 cm bands. Transverters, power supplies and control units

Discovery Power Amplifiers  ^updated - The Discovery series of amplifiers are designed and built in the UK by Linear Amp UK Ltd, one of the world’s leading amplifier manufacturers, specializing in high power RF tube amplifiers. The amplifiers use large GS31 or GS35 ceramic triode tubes. Band coverage 6m, 2m and 70 cms

E. H. Armstrong - Radio's premier inventor, Edwin H. Armstrong was responsible for the Regenerative Circuit (1912), the Superheterodyne Circuit (1918), the Superregenerative Circuit (1922) and the complete FM System (1933).

TubeCalc - Input (grid or cathode) and output (plate) tube resistances calculation according to its electrical characteristics, frequency, mechanical dimensions and working conditions.

MatchNet - This program calculates impedance matching for tube and solid-state PA, LNA, antenna match-box, interstage impedance matching and all other impedance matching in electronic and telecommunication.

Receiver block diagram - This is a block diagram of a superhetrodyne receiver.

Tube FAQ - The Vacuum Tube FAQ by Henry Pasternack

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.