"The dimensions of grids used in receiving valves must be kept to within very close
tolerances, for any variation in size would greatly affect characteristics and performance. Moreover, and particularly in
the miniature and sub-miniature types, the clearances between electrodes are so small that evan a minute inaccuracy in dimensions
would result in an internal short curcuit.
Each individual grid is therefore gauged before being issued to the assembly department. Our front cover
this month shows a grid being placed in a delicately adjusted machine which corrects the overall dimensions.
A fuller account of grid making is given elsewhere in this issue."
| Technical Contents : | Valve Manufacturing Technique (Pt.4) - The Manufacture of Grids Valve Testing in the Service Department Mullard World Series of Valvs for Television (pt.4) - Booster Diode Type PY80 Valves and Photocells in 16-mm Sound-On-Film Equipment |
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Last updated 21st December 2010 |