From Philco Transistor Centre, USA. comes speed far beyond human perception. Philco's new MADT transistors represent a major breakthrough in the electronics switching frequency barrier... switching speeds measured in millimicroseconds (1musec-the time it takes light to go 1 foot ..traveling at 186,000 miles per second!).

Meet the mighty midgets of modern electronics...new, virtually indestructible surface barrier transistors from Philco Transistor Centre, USA. Here are transistors so reliable that they have amassed tens of millions of transistor service hours in computer circuits at a leading University...transistors so rugged that they have withstood a rocket plunge from 126miles above the earth and continued to operate with original performance characteristics.

This 2 color leaflet from Raytheon is donated by Frank Philipse from Holland, see website http://www.tubedata.info/. It is a four pages commercial document with the latest transistors for that time (end fifties) in the Jetec 30 packages. There where three packages styles from 0.59˚C/mWatt till 0.36˚C/mWatt. At the back of this folder we find 5 different diode packages with several diodes in the CK-series and 1N series.