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PT2221

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ID = 72373
       
Country:
Taiwan (Republic of China)
Brand: Common type Taiwan tube/semicond.
Tube type:  IC - Integrated Circuit 
Identical to PT2221
Similar Tubes
Other base and data slightly different:
  PT2222

Base Wires
Description


 
Text in other languages (may differ)
Weight 1 g / 0.04 oz
Information source -- Original-techn. papers.   PTC

pt2221_umgeb1.png
PT2221: PTC
Günther Stabe † 19.8.20

pt2221_00x_s.png PT2221: PTC
Günther Stabe † 19.8.20

Usage in Models 1= 1997?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of

 
pt2221.jpg

PT2221
 

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