TRANSISTOR MUSEUM

Historic Transistor Photo Gallery

 

 

Transistor Size (1/4 Diameter X 1/4H)

Standard T0-5 Case

No Date Code

 

Cardboard Box Packaging

 

 

GE 2N508

 

TYPE

Germanium PNP Alloy Junction

Stable Power Gain

 

USAGE

Audio Driver

 

DATE INTRODUCED

1957

 

CASE STYLES

Black Metal (Early)

Silver Metal (Later)

 

AVAILABILITY

Common (High Volume Production)

 

 

HISTORIC NOTES

The 2N508 was one of the first germanium transistors developed specifically for stable and high quality audio driver performance. Introduced in 1957, this was a very successful device and was produced by GE for over a decade. The first use of the 2N508 in HiFi audio circuits was documented in the 1958 3rd edition of the GE Transistor Manual, where this device is shown in both solid state and in hybrid (transistor and vacuum tube) HiFi circuits. In addition, GE manufactured professional quality audio preamplifiers in the late 1950s and early 1960s which used the 2N508. The 1958 Allied Radio catalog lists the 2N508 for $1.87.

 

 

 

 

 

 

 

Copyright 2004 by Jack Ward

http://www.transistormuseum.com