Oscilloscope RM35A

The Tektronix Type RM35A is a rack-mount DC-to-15 Mc Oscilloscope with a wide range of sweep delay. It is easier to operate and offers higher performance than its predecessor, the Type 535.
Color-correlated controls contribute greatly to ease of operation. Other contributing factors to easy operation of the Type 535A are simplified panel layout and horizontal display control, single-knob sweep and calibrator controls, and internal triggering for sweep delay.
Greater reliability has been achieved through use of the new frame-grid twin triodes, and a change to silicon diodes in the power supplies. Performance improvement includes an extra 5 Mc in vertical response and wider range of sweep delay.

Simplified panel layout. Color-correlated controls.
Two Kinds of Sweep Delay
Triggered jitter free—delayed sweep is started by signal under observation. Conventional—delayed sweep is started by delayed trigger.
Greater Calibrated Delay Range
1 µsec to 10 sec, continuously adjustable (2 µsec/cm to 1 sec/cm).
DC-to-15 MC Vertical Amplifier
All Tektronix Type A to Z Plug-In Preamplifiers can be used for signal-handling versatility.
Two Time-Base Generators
Time Base A - 0.1 µsec/cm to 5 sec/cm in 24 calibrated steps, continuously variable from 0.1 µsec/ cm to 12 sec/cm. 5-x magnifier increases calibrated range to 0.02 µsec/cm. Single-sweep provision for one-shot applications.
Time Base B—Also functions as delay generator.
18 calibrated steps from 2 µsec/cm to 1 sec/cm.
CRT: T533P2

Here you find 386 models, 374 with images and 92 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Tektronix; Portland, OR