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2N257

Information - Help 
ID = 36185
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Transistor   Power/Output 
Identical to 2N257
Similar Tubes
Normally replaceable-slightly different:
  4247 ; CTP1257 ; THP50 ; THP51
First Source (s)
Mar.1956 : -- Collector info (Sammler)
Base SPECIAL TUBEBASE in general
Description

PNP germanium alloy transistor intended as AF power amplifier.
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Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip		 27 x 10 x 40 mm / 1.06 x 0.39 x 1.57 inch
Weight 12 g / 0.42 oz
Information source -- Collector info (Sammler)   KTT 1969/70, TTT Steidle 1981
2n257.png
2N257: F T
Egon Strampe
to3_42.gif 2N257: TVT 1969 Verlag Nolde Dachau
Günther Stabe † 19.8.20
intermetall_2n257.png
2N257: INTERMETALL data sheet 1961
Harald Giese
More ...
Usage in Models 5= 1957? ; 1= 1958?? ; 1= 1958 ; 4= 1959? ; 5= 1959 ; 1= 1960 ; 1= 1961 ; 1= 1962 ; 2= 1964 ; 1= 1965?? ; 1= 1970??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):23

Collection of

Christian Schaufelberger (CH)
 
sh105281.jpg

2N257
 
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