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1S2A

Information - Help 
ID = 4171
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  High-vacuum Rectifier 
Identical to 1S2A = DY87
Similar Tubes
Normally replaceable-slightly different:
  1R10 ; 1R12

Base Noval, 9 pin miniature (USA pico-9) B9A Top contact with a cap.
Filament Indirect
Information source Essential Characteristics, GE 1973   
 
1s2a.jpg
1S2A: SI
Stuart Irwin

 
1s2a_so.png
1S2A: RCA Reference Book 1968
Michael Schlör

 

from Just Qvigstad

Usage in Models 1= 1960 ; 1= 1961?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2


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