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 and an amplifier.
The power supply for them 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.
Instruments
- 1216-A
- 1206-B
- 1203-A
- 1204-B
- 1211-A
- 1214-A
- 1215-A
- 1208-A
- 1209-A
- 1217-A
- 1213-A
- 1203-B
- 1212-P1
- 1212-P2
- 1213-C
- 1201-B
- 1214-E
- 1214-M
- 1211-B
- 1209-B
- 1209-BL
- 1208-B
- 1215-B
- 1218-A
- 1213-D
- 1210-C
- 1220-A
- 1220-A1
- 1220-A2
- 1220-A3
- 1220-A4
- 1220-A5
- 1220-A6
- 1220-A7
- 1220-A8
- 1361-A
- 1203-BQ18
- 1201-BQ18
- 1214-AS2
- 1210-B
- 1210-P1
- 1203-BQ11
- 1201-AQ18
- 1201-A
- 1202-A
- 1212-P3
- 1267-A
- 1269-A
- 1264-A
- 1263-B
- 1208-C
- 1209-C
- 1209-CL
- 1211-C
- 1215-C
- 1217-B
- 1218-B
- 1217-C
- 1201-C
- 1362
- 1363
- 1313-A
- 1312
- 1264-B
- 1263-C
- 1267-B
- 1218-BV
- 1206-A
- 1207-A
- 1207-P1
- 1207-P2
- 1207-P3
- 1207-P4
- 1207-P5
- 1207-P6
- 1207-P7
- 1207-P8
- 1207-P9
- 1207-P10
- 1207-P11
- 1207-P12
- 1205-A
- 1214-D
- 1219-A