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ID = 34913
Brand: Siemens; D (S.& Halske / S. Electrogeräte)
Tube type:  IC - Integrated Circuit   Audio Frequency 
Identical to TAA521 = µA709 = SN72709
Similar Tubes
Normally replaceable-slightly different:
  MAA503 ; MAA504 ; N5709T
Other characteristic (electr. data):
First Source (s)
Oct.1966 : -- Collector info (Sammler)
Successor Tubes TBA221  

Base Wires
Filament Solid State
Description Operational Amplifier 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
10 x 6 x mm / 0.39 x 0.24 x inch
Weight 1 g / 0.04 oz
  TAA521: Siemens Halbleiter-Beispiele 1973
Günther Stabe † 19.8.20
TAA521: G.S.
Günther Stabe † 19.8.20

TAA521: Elektor 1977
Günther Stabe † 19.8.20

TAA521: Siemens Integrierte Schaltungen 1972/73
Thomas Günzel

Usage in Models 1= 1974? ; 1= 1975?

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

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