 | This articlemay containoriginal research. Pleaseimprove it byverifying the claims made and addinginline citations. Statements consisting only of original research should be removed.(September 2021) (Learn how and when to remove this message) |
 Akai X-500VT1⁄4 inch (6.4 mm) VTR at DC Video | |
| Media type | Magnetic tape |
|---|---|
| Encoding | NTSC,PAL,SECAM |
| Read mechanism | Helical scan |
| Write mechanism | Helical scan |
| Standard | Interlaced video |
| Developed by | Akai |
| Usage | Home movies |
| Released | 1967 |
The1/4 inch Akai is a portablehelical scanEIA andCCIRanalog recording video tape recorder (VTR) with two videorecord heads on the scanning drum. The units were available with an optionalRFmodulator to play back through aTV set, as well as a detachablevideo monitor. The Akai Electric Ltd. VTR plant was inTokyo,Japan.
Akai modelVTS-100 was introduced in 1967 and was aB&W portable VTR with a one tube camera.
The next models, VTS-110 and VTS-120, had similar specifications:
The Akai X500-VT is perhaps the oddest of the Akai format machines in as much as it is both a stereo reel to reel audio recorder of3+3⁄4 in/s (9.5 cm/s) and 7.5 in/s (19 cm/s) tape speed having an auto reverse function, as well as a video recorder combined in the same machine. Two separate tape paths are used and according to the way the tape is threaded, either two channel stereo audio 4-track, or black and white video with monoaural sound could be recorded and played. Tape speed for video recording like the VT100 and VT110 is11+1⁄4 in/s (29 cm/s).
For the time, this machine was very advanced using many innovations not used in other domestic video machines for many years, such as inverter drive video head motor. About 10 years later, when Sony introduced the Beta format, in the first couple of models the video head speed was controlled by a line synchronized AC motor and eddy-current brake.
The X500VT was sold only in Japan and the United States (under the Rheem/Roberts re-badge agreement) and in very low quantities due to its high cost. the highest serial number known to author is 00050, indicating the probability of only a tiny production run.
Camera specs:
Akai produced two types of portable black and white VTR using1⁄4 inch (6.4 mm) tape: Portables using an open reel of 13 cm diameter (VT-100/-110/-120), and a single stationary model using a 27 cm open reel, designated VT-700.
Akai modelVTS-150 was introduced in 1974. It recordedcomposite video on1⁄4 inch (6.4 mm)reel-to-reelvideotape and could record and play back B&W orcolor. It came with a hand-held two-tube camera with azoom lens. The system was very small and lightweight for its time. The VTR with thevideo camera weighed only 22 pounds. A single cable was used to connect theENG camera to the VTR for power, video and themicrophone audio. This model was available inNTSC,PAL andSECAM television formats.
VTR specs:
Camera specs (NTSC,PAL andSECAM):