TRANSISTOR MUSEUM Historic Transistor Photo Gallery
Transistor Size (1/4” Diameter X 1/4”H) 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 3^rd 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.
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