Jean Herman (4)

1-09-2010 | In November 1968, the Belgian company MBLE (Manufacture Belge de Lampes et de Mmatériel Electronique) published an article in its “Special n...

1-03-2010 | The instrument described here lets you check that zener diodes up to 200 V are working correctly, and it lets you find out the reverse break...

1-11-2009 | The klystron was invented, and a first prototype constructed, by the brothers Sigurd and Russel Varian working at Stanford University (CA) i...

1-03-2008 | Dekatron valves were developed in the 50s and lasted right up to the end of 1970. They were used as up/down decade counters in applications...