One Inch Magnetic Video Tape Type A, B & C All

One Inch Magnetic Video Tape Type A, B & C; Ampex; San Carlos, (ID = 1795357) Divers
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One Inch Magnetic Video Tape Type A, B & C; Ampex; San Carlos, (ID = 1795357) Divers
Ampex; San Carlos,: One Inch Magnetic Video Tape Type A, B & C [Divers] ID = 1795357 1400x648
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Pour le modèle One Inch Magnetic Video Tape Type A, B & C All, Ampex; San Carlos, CA:
Ampex 196 One Inch Broadcast Helical Video / Ebay auction by user alstercityhunter 371260814269
Pays:  Etats-Unis
Fabricant / Marque:  Ampex; San Carlos, CA
Année: 1965 Catégorie: Divers / autres - détails dans les remarques
Gammes d'ondes - sans
Particularités Special Tape or Cassette-Format
Tension / type courant Pas d'alimentation nécessaire.
Haut-parleur - - No sound reproduction output.
Puissance de sortie
De Modèle: One Inch Magnetic Video Tape Type A, B & C [All] - Ampex; San Carlos, CA
Matière Matériaux divers
Forme Formes diverses décrites en notes.

This page is for all AMPEX labeled 1" open-reel Video Tapes for all TV standards. Encoding A, B & C.

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History (Extracts taken from Wikipedia):

"1 inch type A (designated Type A by SMPTE) is a reel-to-reel helical scan analog recording videotape format developed by Ampex in 1965, that was one of the first standardized reel-to-reel magnetic tape formats in the 1 inch (25 mm) width; most others of that size at that time were proprietary. It was capable of 350 lines.

Type A was developed as mainly an industrial and institutional format, where it saw the most success. It was not widely used for broadcast television, since it did not meet Federal Communications Commission (FCC) specifications for broadcast videotape formats; the only format passing the FCC's muster at the time was the then-industry-standard 2-inch quadruplex.

The Type A format received broad use by the White House Communications Agency from 1966 to 1969. The WHCA, under U.S. President Lyndon B. Johnson, used the format to videotape television broadcasts off the air or from direct White House feeds.

The WHCA recorded programs and events including television appearances by President Johnson, special news broadcasts and news interview programs. Beginning on April 1, 1968, the WHCA taping system was expanded to also include daily morning and evening news programs, both network and local. When U.S. President Richard M. Nixon succeeded Johnson in office in 1969, the WHCA's Type A recording system was continued until it was gradually phased out, later that year, in favor of a recording system using a 2 inch format. 

Early VTRs were black-and-white (B/W) only, later VTRs supported color television, with a heterodyne playback. Still later units had time base correction playback, like the VPR-1 that could be used at television station and post-production houses. The VPR-1 had several problems, it did not record the vertical blanking interval, which is why it was not compliant to FCC broadcast standards. The video quality was not as good as other broadcast VTRs. Thus Sony and Ampex agreed to make a SMPTE approved type C format VTR (which was based on Type A). Hitachi also later made a C format VTR.  

1 inch type B VTR (designated Type B by SMPTE) is a reel-to-reel analog recording video tape format developed by the Bosch Fernseh division of Bosch in Germany in 1976.

1 inch Type C (designated Type C by SMPTE) is a professional reel-to-reel analog recording helical scan videotape format co-developed and introduced by Ampex and Sony in 1976. It became the replacement in the professional video and broadcast television industries for the then-incumbent 2 inch Quadruplex videotape (2 inch Quad for short) open-reel format, due to the smaller size, comparative ease of operation (vs. 2 inch) and slightly higher video quality of 1 inch type C video tape recorder (VTR). 1 inch type C required less maintenance downtime than Quadruplex videotape, and did not require digital time base correction to produce a stable video signal. 1 inch Type C is capable of "trick-play" functions such as still, shuttle, and variable-speed playback, including slow motion."

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