ട്രാൻസിസ്റ്റർ നിലവിൽ വരുന്നതിനുമുൻപ് ഉണ്ടായിരുന്ന active component ആണ് vacuum tube അമേരിക്കൻ ശാസ്ത്രഞ്ജൻ ആയ lee de forest എന്ന വ്യക്തിയാണ് vacuum tube കണ്ടുപിടിച്ചത് അദ്ദേഹം ഇതിനെ audion tube എന്ന് വിളിച്ചു audio amplifier ആദ്യമായി നിർമിച്ചത് vacuum tube ന്റെ സഹായത്തോടെ ആയിരുന്നു. Electronics രംഗത്ത് ഒരു വിപ്ലവം സൃഷ്ടിക്കാൻ vacuum tube നു കഴിഞ്ഞു. ഈ video യിൽ എങ്ങനെ ഒരു vacuum tube amplifier ഉണ്ടാക്കാം എന്നതിനെ കുറിച്ചാണ് ഞാൻ explain ചെയ്യുന്നത്. Video ഇഷ്ടമായാൽ like ചെയ്യുക channel ‪@MrtechElectronics‬ subscribe ചെയ്യുക
PCB layout of EL84 vacuum tube amplifier
drive.google.com/file/d/1ez_O...
drive.google.com/file/d/1eziK...
A vacuum tube, electron tube, valve (British usage), or tube (North America),is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.
The Audion was an electronic detecting or amplifying vacuum tube invented by American electrical engineer Lee de Forest in 1906.It was the first triode,consisting of an evacuated glass tube containing three electrodes: a heated filament, a grid, and a plate. It is important in the history of technology because it was the first widely used electronic device which could amplify.A low power signal at the grid could control much more power in the plate circuit.
Audions had more residual gas than later vacuum tubes; the residual gas limited the dynamic range and gave the Audion non-linear characteristics and erratic performance.Originally developed as a radio receiver detector by adding a grid electrode to the Fleming valve, it found little use until its amplifying ability was recognized around 1912 by several researchers, who used it to build the first amplifying radio receivers and electronic oscillators.The many practical applications for amplification motivated its rapid development, and the original Audion was superseded within a few years by improved versions with higher vacuum.
#vacuumtube #valve #amplifier