This was the RCA 8D21, capable of producing 5 kilowatts at frequencies up to 300 megacycles, considerably beyond the 216-megacycle upper limit of commercial television broadcasting in the VHF band. (p. 65)

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Rca 8d21

An internally neutralized, push-pull Of the features at Very high the Of a compact, high Current- in are 8D21 – Internally water cooled dual tetrode used in early VHF TV transmitters. 9C21 – 100 kW Water-cooled power triode, directly heated, 4-pin base with dual top caps for grid and anode RETMA receiving tubes system (1953) [ edit ] 2012-04-08 · This page was last updated on: April 8, 2012. You are visitor. number RCA 852 - data sheet - 4 pages. RCA 8D21 - data sheet - 10 pages. RCA Beam Power Tube 6146 W - data sheet (1965) 7 pages.

The final power stages of the aural and visual sections each used the RCA 8D21 dual tetrode operated as a push pull amplifier.

8D21 The 8D21 is a 6000 watt, water cooled tetrode with a maximum frequency of 300 MHz. Made by RCA and used in the TT-5A, 5 KW television transmitter. Length =12.00" Diameter = 5.75" Max voltage = 6000 Max current = 2 amps Fil voltage = 4.2 Fil current = 135 amps GOTO INDEX

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RCA's TT-5A Transmitter and 8D21 Tube A historical and technical discussion of this transmitter and the unusual tube it used. Fifty Years of Tube Repairing in Buenos Aires A history of the various companies set up by Jose Schiaffo to repair large tubes. British Valve Nomenclature: Cossor

The separate, sideband filter used in RCA's RCA (HB3) T~ 889A.pdf (472614 bytes) 889A (= GL889A) General Electric T~ GL889A.pdf (785376 bytes) 889R Amperex T~ 889R.pdf (411684 bytes) 889RA (= ML889RA) Machlett Laboratories T~ 889A.pdf (398568 bytes) 889RA RCA (HB3) T~ 889RA.pdf (178525 bytes) 89 RCA Computing. RCA is offering new, comprehensive ranges of tablets, computers, external storage devices and other IT accessories.

References RCA -8D21, used in 5 -kw TV transmitters RCA -5592, used in 50-kw Ell transmitters RCA -5671, has thoriated -tungsten filament, *be used in 50 -kw AM transmitters ßeyovdPríoe THE THREE TUBES illustrated are striking examples of RCA's pioneering in modern tube development the kind of engineering leadership that adds value beyond price 8D21 RCA (HB3) QQ~ 8D21.pdf (438373 bytes) 8D5 (= 6BR7) Brimar p 6BR7.pdf (127184 bytes) 8D8 Brimar p 8D8.pdf (556946 bytes) 8DP4 RCA (HB3) CRB 8DP4.pdf (68181 bytes) 8DP4 Sylvania CRB 8DP4.pdf (261909 bytes) 8DX8 (= XCL84) Miniwatt tP 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 in the output stages - RCA 8D21 twin tetrodes - permitting unusually small r -f drivers Requires fewer spare tubes-only 15 types.
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Features: 1.Available for connection to an external device such as an amplifier via standard RCA jacks or a headphone via 3.5mm jack cable. 2.Supports uncompressed 2-channel LPCM digital audio signal input.

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.
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8D21 RCA (HB3) QQ~ 8D21.pdf (438373 bytes) 8D5 (= 6BR7) Brimar p 6BR7.pdf (127184 bytes) 8D8 Brimar p 8D8.pdf (556946 bytes) 8DP4 RCA (HB3) CRB 8DP4.pdf (68181 bytes) 8DP4 Sylvania CRB 8DP4.pdf (261909 bytes) 8DX8 (= XCL84) Miniwatt tP

Radio tubes are valves. • The RCA 8D21 in RCA Broadcast News No. 48 - March, 1948 • Duplex Tetrode UHF Power Tubes in Proceedings of the I.R.E.

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8D21 Author: RCA Subject: JA-FP-2002-06-14 Created Date: 6/14/2002 11:26:20 PM

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