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Broadcast Equipment Manuals A collection of instruction manuals for various types of radios and broadcasting equipment. DocumentsDate addedDuring the late 1940's and early 1950's much of television engineering was in what may be termed the 'experimental' stage. Most VHF transmitters were limited to about 5 KW peak visual power and about half that power for the aural. The General Electric Company built one of the first really 'large' high band amplifers that would take the 5 KW of an early RCA, Federal or GE TT-6 and bring it up to a full 50 KW peak visual and 26.5 KW FM for the aural. This amplifier was very popular and this basic design was in use until GE retired from the transmitter field in the late 1960's. Only the tubes and a number of parts were updated. The TT-35 series (of which this amplifier with a TT-6 driver would make) stayed in the field for many years. Notable stations used the TT-35 package. WHAS-TV and KSL-TV are but two of those notable stations. (KRNT-TV, now KCCI, was another...) Description from: http://louise.hallikainen.org/BroadcastHistory/index.php/GeneralElectric Manual from my collection, courtesy of KCCI engineers Ken Drewes and Al Snyder; scan by Stan Adams. 20-megabyte file.
The General Electric GL-6251 tetrode for TV transmitters. This type of tube was used in the power amplifier of KCCI's first transmitter, installed in 1955 and relegated to backup service in 1974. The rig was retired in 1985, when the station's original building was vacated. There were four of these tubes--2 visual, combined for a total output of 50 kilowatts, and 2 aural, running at less than their rated output for a total of 26 kw.
The Hallicrafters SX-16 was a fairly typical communications receiver of the mid-1930's, capable of receiving both broadcast and shortwave radio. This manual came to me from my late great-uncle, Herbert Diedrich. I wish the radio had come with it...
Just the schematic for the SX-16, from the manual.
Tubes were very delicate pieces of electronics. RCA issued an instruction sheet giving instructions for their care and handling.
Many more (nearly 5,000!) datasheets for electron tubes of all types--camera, receiving, transmitting, and specialized types--may be found at Frank's Electron Tube Pages. In particular, look for these camera tubes:
The National NC-121 was a communications receiver of the early 1960's, roughly 1963 or 1964. My grandfather, Alvin Kline, owned one which is now mine. My brother Steve and I loved to go down to the basement when we'd visit our grandparents, and spend hours just listening to the WWV time signals. This is a scan of a copy of the NC-121 manual, as I didn't have access to the original at the time. I now own an original copy of the manual, and will scan that as time allows.
The RCA 5820 image orthicon might be considered the standard monochrome camera tube of the 1950's and 1960's, being used in the RCA TK-11 monochrome camera--which was the standard camera of its day. Datasheet issued in 1956.
The RCA 8134 vidicon was used primarily in film-chain cameras, particularly the RCA TK-27. This datasheet was issued in 1963.
RCA AM modulation monitor, vintage 1950's. This is the instruction pamphlet, with schematic, for the Sears "Silvertone" 9005 AM radio, circa 1950. This is a radio of the classic "All American Five" type, for its five-tube compliment. There were two versions of the radio, with octal and miniature tubes. This manual is for the octal version. |
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