Dual Trace Oscilloscope OS-300 20MHz

A portable general purpose dual trace oscilloscope with a full 8 x 10cm rectangular tube providing a bright display against the calibration graticule. It features two identical input channels with a maximum sensitivity of 2mV/cm and a bandwidth from D.C. to 20MHz. These channels may be displayed separately or together in dual trace mode. Alternatively they can be added or subtracted for sum or difference display. The timebase ranges from 0.2s/cm to 0.5µs/cm and a x10 expansion facility extends this to 50ns/cm. Independent variable sensitivity and sweep rate controls are provided. Particular attention has been paid to trigger performance, with D.C. and A.C. coupling available and a bright-line free-run facility to enable trace location in the absence of trigger. An active T.V. synch separator is provided for those working with video waveforms. The OS300 includes many facilities such as a 1kHz calibrator, a D.C. coupled Z modulation input and a trace rotation control.

ACCESSORIES SUPPLIED
Manual
Mains lead
OPTIONAL ACCESSORIES
Probe Kit PB12
   A passive probe kit with switched X1 and X10 attenuations. X10 attenuation input    
   impedance is 10MΩ/11.5pF.   
Probe Kit PB13
   A X10 passive probe with 1.5m of cable. Input impedance 10MΩ/11.5pF.
Viewing Hood
Trolley
Protective Carrying Case
   A strong case which completely encloses the oscilloscope with 3 thicknesses of
   padding covering the front panel.
Tube Option
   Long persistence Mullard 56825GM CRT P7 phosphor.
Rack Mount Kit
Front Cover

Here you find 23 models, 22 with images and 7 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Gould Advance Ltd.; Hainault