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