Unit instruments

From Arthur E. Thiessen, A History of the General Radio Company (1965):

Later [in 1948], recognizing the need for simple, wide-range, basic, laboratory instruments, particularly, for instance, in schools and colleges, GR introduced the so-called Unit line, a concept of Eastham, developed by Karplus.

Precision laboratory instruments are rather costly, especially in terms of college teaching budgets, but by the careful use of cost-cutting design and manufacturing procedures, good instruments adequate for many purposes can be produced.

The first of a long line of Unit instruments made with these considerations in mind were a wide-range oscillator (1207-A) and an amplifier (1206-A).

The power supply for them (1205-A) was a separate unit, suitable for either, so that one supply could be purchased to power either of them and, later, many other Unit designs for a variety of uses.

Articles on Unit Instruments

Last Modified	Product	Description	Introduced In	Class	Series	Designers
2024-04-16 10:52:42 AM	1264-A	Modulating power supply	1961	power supplies	1264
2024-04-16 10:45:05 AM	1218-B	Unit oscillator	1965	oscillators
2024-04-16 11:00:31 AM	1263-C	Amplitude-regulating power supply	1968	power supplies	1263
2024-04-05 6:48:09 PM	1363	VHF oscillator	1968	oscillators