| Oltronix | Optimation | | |
|
 RCO-5 LF-generator 1960 AEF-242 |
 RCO-6K LF-generator 1970 AEF-780 |  RCO-6 LF-generator 1970 AEF-818 |  RCD1R LF-generator 1960 AEF-1066 | | |
| Otto Wolff | Pacific Measurements Inc |
|  7680 Dekadmotstånd 1900 AEF-774 |  PTR 178 Kompensator 1900 AEF-530 |  PTR 213 Normalmotstånd 0,1Ω 1903 AEF-531 |  PTR 198 Normalmotstånd 0,01Ω 1903 AEF-532 |  Temperaturbad 1903 AEF-533 |  Model 1034A HF-Effektmeter 1980 AEF-541 |
| Philco Co | Precision Electronics Inc | Presto | Racal-Dana | Radio Frequency Lab (RFL) |
|  BC 221-AA Frekvensmeter 1940 AEF-223 |  Model 202 Signalföljare 1950 AEF-111 |  Model 100 Kristallkalibrator 1960 AEF-638 |  9008 Modulationsmeter 1970 AEF-662 |  Referensmagneter 1950 AEF-1108-1114 |  TS-268/U Kristallprovare 1940 AEF-206 |
|
Radiometer AS |
|
MM1 RLC-Mätbrygga
1940-
AEF-276 |
MS21a Signalgenerator
1940-
AEF-304 |
TFG2
LF-generator
1940-
AEF-239 |
MSM1a
El-kronometer
1950- AEF-219 |
AFM1bS1 Modulationsmeter
1960-
AEF-373 |
BKF5g Distorsionsmeter
1960-
AEF-626 |
|
Radiometer AS | Radiation Laboratory | |
|
MS111b
Signalgenerator
1950-
AEF-717 |
TMS1
Svepgenerator
1960-
AEF-221 |
BKF10
Distorsionsmeter
1940-
AEF-724 |
MM2a
RLC-Mätbrygga
1970-
AEF-568 |  TS-34A/AP Oscilloscope 1940 AEF-159 | |
| RCA Harrison | |
|  TMV-75-B Fältstyrkemeter 1940 AEF-250 |  WG290D Kristallmätkropp 1950 AEF-641 |  WG-299D Högspännings-mätkropp 1950 AEF-640 |  WV-98A Rörvoltmeter 1950 AEF-534 | | |
| RLC Electronics | Rutherford Electronics |
|  F-30-12.4N Lågpassfilter 1970 AEF-94 |  F-30-4000N Lågpassfilter 1970 AEF-93 |  F-30-8000N Lågpassfilter 1970 AEF-95 |  F-90-150-4-N Lågpassfilter 1970 AEF-1070 |  B14A Pulsgenerator 1960 AEF-343 |  B14 Pulsgenerator 1960 AEF-552/918 |
