 |
| Identical to |
UX201A
= CX301A
= AX201A
= D401A
= UX-201-A
= 201
= 201A
= 235D
= ER201A
|
| Similar
Tubes |
01A (other shape (e.g. bulb, size))
201A_Japan (other base)
AX (can normally be replaced - small diff'ce)
|
| First Series |
1925 Radios von gestern |
| Predecessor Tubes |
UV201A
|
| Successor Tubes |
01A
UX240
|
|
| Base |
UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo)
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
-: Direct /
-: Battery = /
If: 0.25 Ampere /
Vf 5 Volts /
|
| Description |
Tyne page 308ff brings the details of history. Here the main points only: The first tubes RCA is marketing in 1920 are the detector tube UV200 with argon gas filling and the UV201 Amplifier. Manufacturer was General Electric (GE).
In 1922 GE replaces the UV201 with the UV201A, having now a thorium filament.
In 1925 this tube comes with a new base and standardised construction (of 1923) for neutrodyne apparatus and is then called UX201A. Cunningham is naming the tube CX301A.
By having the tube with a shoulder type glass envelope (dome type) in 1932 the designation is changed to 01A.
Text in other
languages (may
differ)
|
| Tube prices |
0 Tube prices (visible for members
only)
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
|
|
|
|
|
|
KoBi
Konrad Birkner
|
|
KoBi
Konrad Birkner
|
|
|
