“First siliicon in Silicon Valley”. A PNPN diode, 1958 production from the ill-fated Schockley Transistor Coroporation, working merrily in a simple relazation oscilator. The diode is the tubular gold-colored device in the clips at lower left. The pulse rate shown is 800Hz, but the falltime is so crisp as to put a vigorous whine into an AM radio receiver a couple of feet away.
In this issue
- William Shockley, the PNPN Diode, and the Schockley Transistor Corporation
- Review; Historische Elektronen-Rohren Telephonie und Radio
- Interrogation of Prof. Scherzer of the BHF
- GE “Train Control” Tubes
- Electronic Equipment in Train Control
- Repair Hint; Dissolving Base Cement
- Jennings Radio Manufacturing Co.
- Weird Tube of the Month: The “B” Tube
- The Murphy Electricity Rectifier
Leave a Reply