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AF4

Information - Help 
ID = 77893
       
Country:
Worldwide
Brand: Common type Worldwide tube/semicond.
Tube type:  Transistor   Audio Frequency 
Identical to AF4

Base Wires
Description

Aufbau/Material/Pol.: Silizium Planar NPN;
Form/Case/Outline: TO-5;
Daten/electr.data: I F: __ mA; U S: __ V; Isp: __ µA; ß (beta): __; N: 600 mW; Imax: __ mA; Umax: __ V; f g: __ MHz; tmax j: __ °C.

This is NOT a specific transistor - it is a Replacement Classification System ID of BRC (British Radio Corporation Ltd.)
AF4 stands for one of the following transistors: U3847, BC119UA, BFY52, BC140D, BSY54, TIP90, ...
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Weight 1 g / 0.04 oz
Information source -- Collector info (Sammler)   BRC Bulletin

af1_af4~~1.png
AF4: Eugen Queck Plan, nachgezeichnet
Ralph Oppelt

to_5_tvt~~262.png AF4: TVT 73
Günther Stabe † 19.8.20

Usage in Models 3= 1970? ; 1= 1971

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4

Collection of

 
af4_bearb.jpg

AF4
 

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