In a few specialized transmitting tube designs, for example, the RCA 8D21 and the General Electric GL6019, coatings of thorium oxide on tantalum or tungsten have been employed as cathodes. In any such application of thorium oxide, the problem of cathode erosion may be encountered; that is, the end of tube life may result from the disappearance of thorium oxide from the emitter.
RCA Data Sheet 01-A 2 RCA–2 RCA 1,5 M. 84-7670. 19 90. Lägg till. 2 RCA–2 RCA 5,0 M. 84-7680. 39 90. Lägg till. Andra kunder köpte ocks Ljudkabel 2x RCA-hanar till 2x RCA-hanar.
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Documents: • Radiotron 8D21 in RADIOTRONICS No. 119 - May-June, 1946 8D21 RCA (HB3) QQ~ 8D21.pdf (438373 bytes) 8D5 (= 6BR7) Brimar p 6BR7.pdf (127184 bytes) 8DP4 RCA (HB3) CRB 8DP4.pdf (68181 bytes) 8DP4 Sylvania CRB 8DP4.pdf (261909 bytes) 8DX8 (= XCL84) Miniwatt tP XCL84.pdf (219707 bytes) (pt) 8EB8 : RCA (RC30) tp RCA-8D21. Saved by University of Maryland Special Collections. People also love these ideas The final power stages of the aural and visual sections each used the RCA 8D21 dual tetrode operated as a push pull amplifier. Dual tetrode construction did away with the need for neutralization of these stages, assuring better picture quality and less likelihood of adjacent channel interference.
So many projects, so little t The SPDIF2AA Toslink/Optical SPDIF to RCA Audio Converter lets you convert a 2-channel Digital Coaxial or Toslink/Optical SPDIF input signal into an RCA analog stereo output. Perfect for home and professional audio applications, this SPDIF to RCA audio converter saves the cost of upgrading equipment for compatible connections, and offers separate Digital Coax and Toslink inputs for dual Feb 11, 2013 - Radios and TVs from the Mass Media and Culture collection at the University of Maryland. See more ideas about university of maryland, mass media, radio.
Feb 11, 2013 - Radios and TVs from the Mass Media and Culture collection at the University of Maryland. See more ideas about university of maryland, mass media, radio.
n° 270, note H. GROUTEL ; RDC. 2008/4, p. 1155, obs. O. DESHAYES ; RDC 2008/4, p. 1214, obs.
The final power stages of the aural and visual sections each used the RCA 8D21 dual tetrode operated as a push pull amplifier. Dual tetrode construction did away with the need for neutralization of these stages, assuring better picture quality and less likelihood of adjacent channel interference.
- November, 1948 Thanks to Charles Osborne for his help in acquiring this tube, and for providing documentation. Hauteur • Height • Höhe : 305 mm • 12" 8D21—Internally water cooled dual tetrode used in early VHF TV transmitters. This numbering system was abandoned in 1944 in favor of a non-descriptive numbering system of 4 digit numbers beginning with 5500. This new system persisted until the final days of tubes, with type numbers registered up into the 9000 series. The final power stages of the aural and visual sections each used the RCA 8D21 dual tetrode operated as a push pull amplifier. Dual tetrode construction did away with the need for neutralization of these stages, assuring better picture quality and less likelihood of adjacent channel interference. This page was last updated on: April 8, 2012.
RCA 1963 AN-199 Snivets. RCA Data Sheet 15. RCA Data Sheet V99_X99. RCA Data Sheet 46. RCA Data Sheet 3AU6. RCA 1934 AN-33 The RCA-800 in Class B Audio Amplifiers.
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Directory covers Vacuum Power Tubes, The RCA "Dark" Heater An exploration of an RCA innovation in heater design, how it was marketed, and some tubes RCA's TT-5A Transmitter and 8D21 Tube Electron tube Type · Brand · System · Data sheet. 889, Amperex, T~, 889.pdf ( 424954 bytes).
Length =12.00" Diameter = 5.75" Max voltage = 6000 Max current = 2 amps Fil voltage = 4.2
RCA 8D21 Water-cooled High Power VHF TV Transmitting Tube, ca. 1945. 30 points. 10 comments.
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Saved by University of Maryland Special Collections. People also love these ideas The final power stages of the aural and visual sections each used the RCA 8D21 dual tetrode operated as a push pull amplifier. Dual tetrode construction did away with the need for neutralization of these stages, assuring better picture quality and less likelihood of adjacent channel interference.
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After the standard RCA clean, a 4 nm tunnel oxide was thermally grown at 850 °C 8d [21]. Fig. 8. Sign in to download hi-res image. Fig. 8. (a) Bird's eye view of
8D21 Author: RCA Subject: JA-FP-2002-06-14 Created Date: 6/14/2002 11:26:20 PM THE RCA 8D21 HIGH POWER AT VERY HIGH FREQUENCIES significant step forward in the development of power tubes for television occurred last spring with the introduction of the RCA-8D21 the RCA Tube Department. An internally neutralized, push-pull Of the features at Very high the Of a compact, high Current- in are • The RCA 8D21 in RCA Broadcast News No. 48 - March, 1948 • Duplex Tetrode UHF Power Tubes in Proceedings of the I.R.E. - November, 1948 Thanks to Charles Osborne for his help in acquiring this tube, and for providing documentation. RCA 8D21 Water-cooled High Power VHF TV Transmitting Tube, ca.