Video Portable Tape Recorder VPR 5
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Brand
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Nagra | ||||
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| Year: 1984 | Category: Sound/Video Recorder and/or Player | ||||
| Semiconductors (the count is only for transistors) | Semiconductors present. |
| Main principle | Audio-Amplification |
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| Wave bands | - without |
| Details | Video-Taperecorder/-Player |
| Power type and voltage | Batteries / addl. power jack / ? / 10 -18 Volt |
| Loudspeaker | - For headphones or amp. |
| Power out | |
| from Radiomuseum.org | Model: Video Portable Tape Recorder VPR 5 - Kudelski SA; Cheseaux-sur- |
| Material | Metal case |
| Shape | Portable set > 8 inch (also usable without mains) |
| Dimensions (WHD) | 442 x 137 x 215 mm / 17.4 x 5.4 x 8.5 inch |
| Notes | The NAGRA VPR-5 is a remarkable piece of engineering, one can be see in The Metropolitan Museum of Modern Art, New York. It is a video portable tape recorder using 1” magnetic tape in C format. VPR 5 development plans were introduced to professionals at the 1982 IBC convention at Brighton. However its production only begins in 1984. Sony Betacam format using cassettes with ½” tape (more practical) was announced one year before and VPR 5 market suffers with this and with its high price of US$ 45,000. AMPEX, a professional video recorder maker with high quality tradition, made some improvements in initial NAGRA design and VPR 5 was marketed as AMPEX NAGRA VPR – 5.
VPR 5 Main Specifications:
Reels: 5.5” to 9” diameter (special reels) Recording time: 20 minutes with special 5.5” (portable mode reels under the recorder cover) and up to 1 hour using 9” reels.
Video: Direct Colour video recording (without any heterodyning)
Video Differential gain: <4 %
Crominance/Luminance delay: < 25 ns
Inputs: Video 75 ohms BNC 0.5 V to 2.5 V peak to peak Audio: MIC- 150 µV (min) - optional interface, 40 dB above (max)
LINE – +8 dBm (nom.) at 25 k with optional interface (-20 dBm (min) + 24 dBm (max) Monitoring: Real time audio and video recorded. Video is B&W directly but the accessory NV-V10 (Time Based Corrected Colour) adapt to a colour monitor. Batteries: 2 types- intelligent battery (normal) fits in a recess of the case; battery 4 Ah (NV-2ACC) in a deeper package Battery capacity: 1 hour of recording Energy recovery: when the helical scanning system stop energy is recovered to charge batteries. Power Supply: 100 – 240 V AC (external AC adapter) 105 VA to 138 VA; or 10V -18 V 40W external DC adapter. Models: VPR-5 is the original one and VPR-5 MkII is a revised version. |
| Net weight (2.2 lb = 1 kg) | 6.8 kg / 14 lb 15.6 oz (14.978 lb) |
| Price in first year of sale | 45'000.00 dollar |
| Mentioned in | - - Manufacturers Literature |
Model page created by Moisés Piedade. See "Data change" for further contributors.
All listed radios etc. from Kudelski SA; Cheseaux-sur-Lausanne
Here you find 48 models, 45 with images and 19 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
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Ampex Nagra VPR-5 Restoration Tipps
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Hubert Eisner
03.Aug.17 |
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If you ever come across the repair of the Ampex Nagra VPR-5 be careful not to just switch it on to see what happens … For whatever reason, the friction brakes inside the supply- and take-up reel motor assemblies were made from some early silicon material that changed to sticky glue as the decades went by, effectively braking both motors to a standstill. As removing the sticky stuff and replacing it by some other sticky stuff would just open a Pandora’s box, a layer of thin coated plastic sheet does the trick. Polyethylenterephthalat (PET) is the raw material for readily available, silicon-coated plastic sheets with typical thicknesses from 1 to 800 µm. It is recommended that you do not start the VPR-5 without checking first that the motors move freely. The electronics might break down during the brief period of time between the motors trying to run and the sensors recognising the error and switching off the current. If this happens more than once, damage is unavoidable. Fortunately, Ampex and Nagra supply ample documentation and each(!) cable is numbered(!). All you need (or get during the process) are strong arms (the documentation folders are heavy) and good eyes (the size of the numbering on the cables is around 1/256th of an inch). Attachments
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