Technical Associates Models TA-B1 and TA-B3 Thin Wall GMs (ca. early 1950s) |
|
| These glass-walled GM tubes were probably manufactured by Technical Associates of Glendale California in the early 1950s. Although the tube on the right has no markings on it that would help identify the manufacturer, it came with the Technical Associates Model TA-B1 (on the left side of the photo) and its dimensions and appearance are identical to those of the Technical Associates Model TA-B3. | |
| Both of these tubes can be
considered thin walled beta counters. Since they are photosensitive, they
would need to be operated in a light tight enclosure. The major difference
between the two is that the electrical connection to the cathode in the
Model TA-B1 is via a short side arm projection on the glass wall. In the
Model TA-B3, the cathode connection is at the end of the tube adjacent to
the anode connection. Otherwise, their specifications are identical.
Size: 7" long, 3/4" diameter Wall: glass, 30 mg/cm2 Cathode: Inner surface of glass wall coated with silver Operating voltage: 1400 - 1600 volts Gas: tetramethyllead vapor
Reference AEC Radiation Instrument
Catalog, page date |
 |