Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 79142
Brand: Telefunken Deutschland (TFK), (Gesellschaft für drahtlose Telegraphie Telefunken mbH
Tube type:  IC - Integrated Circuit   Audio Frequency 
Identical to U446B

Base SPECIAL TUBEBASE in general

Aufbau/Content: IC (4 Trans., 15 Widerst., 4 Dioden, 1 Kond.);
Form/Case/Outline: DIP-8 | SOP-8 (U446BFP) ;
Applikation/Type: DynamicTelephone Microphone Amplifier;
Daten/ Vcc: <43.2 V (z-stab.: 11.4 ... 12.7 V); Icc: 24 mA; Pd: <720 mW; Rin: 10 kΩ; Rout: 70...400 Ω; Gain: >50.3 dB; t op: -28...+60°C.
Ähnlich/similar: U646B, U647B (EMT radiation protected)

Dimensions (WHD)
incl. pins / tip
10 x 7 x 8 mm / 0.39 x 0.28 x 0.31 inch
Weight 1 g / 0.04 oz
Information source - - Manufacturers Literature   

U446B: Datenblatt
Karl-Heinz Kornath

Collection of



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]

Data Compliance More Information