radiomuseum.org

 
Please click your language flag. Bitte Sprachflagge klicken.

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
Filament Solid State
Description

PNP germanium alloy transistor intended as AF power amplifier.
-

 
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
 
sh105281.jpg
2N257: scc
Christian Schaufelberger

 
to3_42.gif
2N257: TVT 1969 Verlag Nolde Dachau
Günther Stabe

 

Usage in Models 3= 1957? ; 1= 1958?? ; 1= 1958 ; 3= 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):20


You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
rmXorg