Philco 2N1158A  
Written by Accutron on 2017-02-09  

The Philco 2N1158A is a germanium PNP micro alloy diffused transistor (MADT), an improved type of surface barrier transistor capable of operating at frequencies in excess of 200MHz. The example shown here is a U.S. Army variant.

Philco 2N1158A germanium PNP MADT.

2N1158A transistor, underside construction.

This article is part of the [Discrete Semiconductors] exhibit.

©2000-2019 The Vintage Technology Association. All rights reserved.