Note
Service magazine, Sep 1937, p. 581.
Lafayette catalog number 69, p. 81.
Uses a type 54-XH CRT.
Vertical amplifier "has a gain of 450."
No other specifications provided,
The scope includes what DuMont called a "wave expanding feature." The following text is from a description in Service magazine, Sep 1937, p. 580.
"The wave-expanding feature as incorporated in the latest DuMont 5-inch all purpose oscillograph, is valuable in the study of complex waves where it is desirable to spread a small portion of the wave for detailed study: It allows expansion. of waves of much higher frequency than the fundamental frequency of the sweep. Million cycle waves can be observed with good detail, and the return trace eliminator, a regular television principle, permits the waves to appear only on the forward linear portion of the sweep."