Vintage Technology: Vacuum Tubes 1943 Training Film (The TRIODE) Signal Corps Army Air Force Radio. 38:57. RCA Vintage Tube Radio Model 56X americanradiodesign.blogspot.com. 41:42. RCA Victor A23 Tube Radio, видео № 1 - Проверка и первое включение. The original triode vacuum tube, the Audion, invented by Lee de Forest in 1906. (Image courtesy of Gregory F. Maxwell.) In any modern-day electrical The basic working principle of a vacuum tube is a phenomenon called thermionic emission. It works like this: you heat up a metal, and the thermal. We carry over 5,000 radio and vacuum tubes in stock every day and we ship world wide. ... The first popular beam tetrode was the RCA 6L6, introduced in 1936. ... These tubes glow a strong blue-purple color in normal use. They turn AC power into DC to run the other tubes. -And occasionally, vintage and modern amplifiers use gas-discharge.
2 VINTAGE 6SL7-GT VT229 VACUUM TUBES JAN RCA SYLVANIA PREAMP AMP HIFI TESTED NOS. Pre-owned Pre-owned Pre-owned. $89.00. Free shipping Free shipping Free shipping. Seller 100% positive Seller 100% positive Seller 100% positive. Lot of 5 VINTAGE RCA 6GH8A ELECTRON RADIO VACUUM TUBEs - GUARANTEED. In the years 1942-1944, the Radio Manufacturers Association used a descriptive nomenclature system for industrial, transmitting, and special-purpose vacuum tubes.The numbering scheme was distinct from both the numbering schemes used for standard receiving tubes, and the existing transmitting tube numbering systems used previously, such as the "800 series" numbers originated by RCA and adopted. Wanted: Vintage vacuum tubes, old amplifiers, radios, etc. -. $100. (rocklin) I have a small guitar amplifier business and also collect vacuum tubes and vintage electronics. I am looking for old vacuum tubes, tube testers, etc. If you or a relative have an old box of vacuum tubes lying around in the attic collecting dust, send me an email and.