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2. H. H. Scott, Inc. - Wikipedia

   en.wikipedia.org/wiki/H._H._Scott,_Inc.

   The company pioneered developments in noise suppression, tube output circuits, hifi mono and stereo amplifiers, tuners, FM multiplex, transistor receivers, FET RF sections, and integrated circuit IF sections. Scott's Instrument Division manufactured precision sound measuring and analysis instrumentation for laboratory use.

3. Valve amplifier - Wikipedia

   en.wikipedia.org/wiki/Valve_amplifier

   Valve amplifier. 6N3C power tube. A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers in the 1960s and 1970s.

4. Dynaco - Wikipedia

   en.wikipedia.org/wiki/Dynaco

   Dynaco. Founded by David Hafler and Ed Laurent in Philadelphia, Pennsylvania in 1955, Dynaco was an American hi-fi audio system manufacturer popular in the 1960s and 1970s for its wide range of affordable, yet high quality audio components.. [1] Its best known product was the ST-70 tube stereo amplifier. They also manufactured other tube and ...

5. Eico - Wikipedia

   en.wikipedia.org/wiki/Eico

   EICO was established in New York City in 1945 by radio repair business owner Harry Ashley to manufacture electronic test equipment in kit form. His first product, advertised in the July 1946 Radio News, was the model 113 VTVM/audible signal tracer. [1] A wide variety of test equipment remained the company's mainstay during the time it was in ...

6. Valve audio amplifier - Wikipedia

   en.wikipedia.org/wiki/Valve_audio_amplifier

   A valve audio amplifier ( UK) or vacuum tube audio amplifier ( US) is a valve amplifier used for sound reinforcement, sound recording and reproduction . Until the invention of solid state devices such as the transistor, all electronic amplification was produced by valve (tube) amplifiers. While solid-state devices prevail in most audio ...

7. Lafayette Radio Electronics - Wikipedia

   en.wikipedia.org/wiki/Lafayette_Radio_Electronics

   The electronics kits were produced in the Jamaica facility. [1] Lafayette advertised heavily in major U.S. consumer electronics magazines of the 1960s and 1970s, particularly Audio, High Fidelity, Popular Electronics, Popular Mechanics, and Stereo Review. The company offered a free 400-page catalog filled with descriptions of vast quantities of ...