|
UV201ASensibly equivalent¶ to:
|
|
|
The UV201A, introduced in October 1922, has a thoriated tungsten filament and replaced the UV201. In 1923 it was the most widely sold valve in the USA.By the end of 1922 RCA held exclusive patents.The valve is fully gettered and the hard vacuum valve has replaced the soft valves. The box indicates that the UV201A is intended for both detection and amplification.The original box. Thanks to Joe Gruber for sending the images.The balloon envelope is 44 mm in diameter and, excluding the UV base pins, is 100 mm tall.References: 1047 & Joe Gruber. Type UV201A was first introduced in 1922. See also 1922 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | g1 | f | f | a |
|
|
Absolute Maximum Operating Conditions¶
| Vh | Ah | Va |
| 5.0 | 0.25 | 20-100 |
|
Updated February 12, 2021.
|
|