THE TRANSISTORMUSEUM™ MUSEUM STORE

HISTORIC TRANSISTOR HOBBYIST SUPPLIES! Authentic Supplies for the Transistor Historian and Kit Builder. Available Only from the TransistorMuseum™ All Transistors Tested Before Shipment. Historical Background RCA introduced the 2N404 in 1957, and this device was one of the first of a series of highly successful germanium computer transistors developed by RCA throughout the late 1950s. Dr. Adolph Blicher managed the RCA group responsible for the 2N404, building on his earlier work at the Radio Receptor company where he developed the RR156 computer transistor. The 2N404 was soon adopted an as “industry standard” and sold in the millions, with multiple companies producing equivalent devices (Raytheon, Sylvania, Tungsol, TI, GE, General Instruments, and others). Related transistors include the 2N269 (electrically equivalent to the 2N404, but using a different case), the 2N404A (which is a higher current/voltage version of the 2N404) and the USAF 2N404 (qualified for military use). The 1957 Lafayette Radio catalog lists the RCA 2N404 price as $5.64, which was quite expensive for the time. The 1960 Lafayette Radio Semiconductor Directory lists the 2N404 as available from multiple companies (RCA, GE, Raytheon and Sylvania) for between $2.50 and $3.00. The 2N404 continued to be available throughout the 1960s/70s. The 2N404 remains in use today by hobbyists and experimenters, primarily as an audio or general purpose transistor – this modern usage is a fitting tribute to a classic germanium device, introduced almost 50 years ago!

2N404 GERMANIUM TRANSISTORS Germanium PNP Alloy Junction Transistor Type 2N404 Vintage 1950s - 60s Use: Computer Your TransistorMuseum™ Order Will Contain: Two Tested 2N404 Germanium PNP Computer Transistors (Vintage 1950s/1960s, from a Selected Set of Original Manufacturers) Hobbyist Insert Depicting the Historical Importance of this Classic Transistor, Includes a Schematic of an Early Transistor Digital Logic Circuit Using the 2N404 Computer Transistor A TransistorMuseum™ Classic Semiconductor Storage and Display Envelope ORDER NOW $10 per Package (Two Transistors) Includes Shipping Within U.S. Email me at transistormuseum@aol.com To Determine Payments Options (Paypal or Check) COPYRIGHT © 2005 By Jack Ward All Rights Reserved. http://www.transistormuseum.com Your 2N404 Transistor Order Will be Supplied in the Storage/Display Envelope Shown at Left, which Includes an Insert with Historical Description and a Schematic.