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Old 6th Jul 2020, 7:57 pm   #36
ChrisKt
Triode
 
Join Date: Apr 2019
Location: Cheltenham, Gloucestershire, UK.
Posts: 26
Default Re: DIY X-Ray & Auto Jigger transmitter

This was still going on several years later. Attached a similar section from 'The Boy Electrician' originally published 1920 though this edition is a 1941 update with additional advanced topics such as television. Note there is now a safety warning about X-Rays (though not for the cyanide to make the fluorescent screen ).

Chris K
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