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

 

Philco was an early manufacturer of transistors, starting in 1953/54, with the famous Surface Barrier Type (SBT).  This used a unique electrochemical etching process during manufacture that allowed for an extremely thin germanium base layer, which in turn allowed the transistor to operate at very high frequencies (20 to 30 MHZ).  Philco sold millions of these transistors in the 1950s, which were used in high speed digital computer circuits and high frequency radio circuits.  Improvements to the SBT technology lead to even higher performing MAT and MADT transistors.   Philco continued to be the main supplier, while Sprague became a major second source of virtually identical transistors.

 

 

 

 

 

              

Your Surface Barrier Transistor Order Will be Supplied in the Storage/Display Envelope Shown Above, which Includes an Insert with Historical Description and a Schematic.

 

 

SURFACE BARRIER & MADT TRANSISTORS

 

PNP Germanium
Surface Barrier & MADT
2N128/588 Transistors

Vintage 1960s

Use: Radio & Computer

 

 

Your TransistorMuseum™

Order Will Contain:

 

Two Tested 2N128/588 PNP

 Germanium Surface Barrier/MADT

High-Freq Transistors

(See the Style Shown Above)

 

Hobbyist Insert Depicting the Historical Importance of this Classic Transistor, Includes a Schematic and Project Description of an Early Transistor Project Using the Surface Barrier 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 © 2002

By Jack Ward

All Rights Reserved.

 

  http://www.transistormuseum.com