Sony 1979
Betamax SL-T7

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Video recording system
Rotary two-head helical scanning
Video Signal
Recording: CCIR standards.
PAL and SECAM colour
Playback: CCIR standards.
PAL and SECAM colour / EIA standard
NTSC 4.43 colour
Storage temperature
-20°C to +65°C
Operating temperature
5°C to 40°C
Aerial input
75-ohm, asymmetrical aerial socket
Channel coverage
VHF: Western European channels
UHF: Western European channels
E21 - E68
A total of 8 can be preselected
RF output signal
UHF channels E30 to E39 (variable)
75 ohms, unbalanced


Horizontal resolution
260 lines
B/W:300 lines
Video S/N
Colour: Better than 40dB
B/W: Better than 43dB
Audio frequency response
50Hz to 10,000Hz
Audio S/N
Better than 40dB

Inputs and outputs

Video input
VIDEO IN:BNC connector
1.0 V (p-p)
75 ohms, unbalanced,
sync negative
Video output
VIDEO OUT:BNC connector
1.0 V (p-p)
75 ohms, unbalanced,
sync negative
Audio inputs
AUDIO IN: phono jack
47 kilohms, -10 dBs
(0 d Bs = 0.775 V rms)
Microphone: Mini jack
-60dBs, suitable for microphones
with 600 ohm impedance
Audio outputs
AUDIO OUT: Phono jack
Load impedance less than 10 kilohms
-10 dBs with 47 kilohms load,
Camera connector
14-pin Sony K connector

Tape transport

Tape speed
PAL/SECAM 18.73 mm/sec.
NTSC 20mm/sec
Maximum recording time (PAL/SECAM)
2 hours 10 min. (with Sony L-500 cassette)
3 hours 15 min. (with L-750)
Fast forward/rewind time
Within 3 1/2 min. (with L-500)


Only for recording
Electronic digital timer
24-hour-clock cycle


Power requirements
110-240v AC ±10%, 50/60 Hz
Power consumption
Approx. 485 x 168 x 379 mm (w/h/d)
including projecting parts and controls
Approx. 15.8 kg net