Antique radios, Old Time Radios
AZ21_9pin
|
Country:
Netherlands
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| Identical to |
AZ21_9pin
|
| Similar
Tubes |
Other base and data slightly different:
AZ21
|
| Predecessor Tubes |
AZ1
|
|
Successor Tubes
|
1941
AZ21
|
| Base |
Loctal-9-Pin (B9G)
|
| Filament |
Vf 4 Volts / If 1.3 Ampere / Direct |
| Description |
The Philips 21- "Key Base" tubes were initially designed in 1940 with the 9-pin base B9G like the EF50. The later series production from 1942 on however was changed to the 8-pin Locktal-base B8G designed by Sylvania.
Text in other
languages (may
differ)
|
| Information source |
- - Manufacturers Literature
|
|
AZ21_9pin: original Philips documents
Jacob Roschy
|
Just Qvigstad
|
AZ21_9pin: original Philips documents
Jacob Roschy
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