Information is needed about this device. It carries the markings 1.5kV max anode voltage, 6.3V heater, serial number '01B 644'. The top section is marked 'secondary emission of target', character: 1.06 ± .02, background: 1.49. There are various symbols marked on the inside of the target but these are hard to make out - symbols such as circles and squares.
Donated by Gordon Shorley
This file was last modified15:51:54, Wednesday June 10, 2015