Television Journal November 1934 Page
480-481
Including Valves for the Microwaves down to 40
centimeters, and Home-Made Nicol Prisms by A.H. Berry, M.Sc.
(Lond.) Ah... That'll be my ancient relative on the Berry
side then!
Click to enlarge.
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pages and you have an interest in electronics or repair jobs,
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www.usefulcomponents.com
where there are details of
some good electronics kits and
the related sales outlets.