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The 6AK5 vacuum tube is a miniature 7-pin sharp-cutoff pentode used as RF or IF amplifier especially in high-frequency wide-band applications at frequencies up to 400 MHz. It was developed by Bell Labs / Western Electric and used extensively as an I.F. amplifier in World War II radar systems. The tube is notable for its extremely fine grid, and ...
F Sharp notes. F ♯ (F-sharp; also known as fa dièse or fi) is the seventh semitone of the solfège. It lies a chromatic semitone above F and a diatonic semitone below G, thus being enharmonic to sol bémol or G ♭ (G-flat) in 12 equal temperament. However, in other temperaments, such as quarter-comma meantone, it is not the same as G ♭.
F ♯ (F-sharp) may refer to: F ♯ (musical note) F-sharp minor, a minor musical scale; F-sharp major, a major musical scale; F# (programming language), a .NET programming language "F Sharp", a comedic song by Tim Minchin on his So Rock CD "F ♯ (Wake Up)", a song on Handle With Care by Nuclear Assault; F ♯ A ♯ ∞, an album by Godspeed ...
Thiel Audio: United States TOA Corp. Japan U-Turn Audio: United States Vandersteen: United States Velodyne Acoustics: United States Veritone Minimum Phase Speakers: United States Vifa: Denmark Wharfedale: United Kingdom (brand) Wilson Audio: United States Wilson Benesch: United Kingdom Yamaha: Japan Yorkville Sound: Canada ZR Speaker Lab ...
F-sharp major is the key of the minuets in Haydn's "Farewell" Symphony and of the String Quartet No. 5 from his Op. 76, of Beethoven's Piano Sonata No. 24, Op. 78, Verdi's "Va, pensiero" from Nabucco, Mahler's unfinished Tenth Symphony, Korngold's Symphony Op. 40, and Scriabin's Fourth Piano Sonata.
Optonica amplifier (SM-3636) and tuner (ST-3636) from 1978. The Optonica brand was created and first launched by Sharp of Japan in 1975 to compete in the high-end audio market along with established brands such as Sansui Electric, Sony, Panasonic, Sanyo, Yamaha, Nakamichi, Onkyo, Fisher Electronics, Technics (brand), Pioneer Corporation, Kenwood Corporation, JVC, Harman Kardon and Marantz.
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F-sharp minor is sometimes used as the parallel minor of G-flat major, especially since G-flat major's real parallel minor, G-flat minor, would have nine flats including two double-flats. For example, in the middle section of his seventh Humoresque in G-flat major , Antonín Dvořák switches from G-flat major to F-sharp minor for the middle ...