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01-A

Sensibly equivalent to:
201A
    
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Joe comments that the Daven 01-A is quite rare. The 01A in general was a standard triode and was made by many companies under various Type designations. Here we reproduce the PDF data-sheet of the Cunningham implementation.
Thanks to Joe Gruber for sending the images.
The balloon envelope is  mm in diameter and, excluding the UX4 base pins, is  mm tall.
References: Data-sheet 1047 & 3002. Type 01-A was first introduced in 1925.

 

Pin Connections
UX4
1
2
3
4
a
g1
f
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
5.0
0.25
135
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 06, 2021.
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