Sony 1985
Betamax SL-F90

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Video recording system
Rotary two-head helical scanning
Video signal
CCIR standards, PAL colour
Aerial input
75-ohm, asymmetrical aerial socket
Channel coverage
VHF: Western European channels
E2 - E12
UHF: Western European channels
E21 - E68
(Up to 30 programmes can be preset.)
RF output signal
UHF channels E30 to E39 (variable)
75 ohms, unbalanced


Horizontal resolution
280 lines (Super Beta PRO mode)

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)
75Ohms, unbalanced,
sync negative
Audio inputs
AUDIO IN: 2 phono jacks
47 kilohms, -10 dBs
(0 d Bs = 0.775 V rms)
Microphone: -60 dBs, for
low-impedance microphone
Audio outputs
AUDIO OUT: 2 phono jacks
Load impedance less than 10 kilohms
-10 dBs with 47 kilohms load,
Headphones: Stereo phone jack
-26dBs, 80hms

Tape transport

Tape speed
18.73 mm/sec.
Maximum recording time
2 hours 10 min. (with Sony L-500 cassette)
3 hours 15 min. (with L-750)
Fast forward/rewind time
Within 5 min. (with L-500)


Crystal lock
Time indication
24-hour cycle
Timer setting Only for recording
6 events/3 weeks, adjustable for any
day or for all 7 days of the week
or for every week


Power requirements
240v AC, 50 Hz
Power consumption
Approx. 430 x 95 x 405 mm (w/h/d)
(17 x 3 3/4 x 16 inches) including
projecting parts and controls