Fortiphone Ltd., Fortiphone House, 247 Regent Street, London, W.I. Johnson Matthey Wax-Protected Precision Silvered ... Cambridge. Marconi Instruments E.H.F. Signal Generator (OA 1000) (Illustrated below} ELECTRICALLY this ... The instrument, which is an RC fia#39;ter with valve anode impedances replacing some of the resistance elements, ... When the light path is lengthened by moving the mirrors, a point is reached where the image of the spark on the viewing screen disappears, anbsp;...
|Title||:||Electronic Engineering Design|