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General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc. |
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10th Apr 2017, 9:37 am | #21 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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Re: Strange signal on 62mc/s
Local radiation from crt monitors was once a security issue. Video information from
a monitor in, for example, a bank, could be received outside on a sensitive Band I receiver. This led to crt monitor manufacturers adding a metallic screen to the crt enclosure. This harks back to the 405 line days where set makers fitted a foil screen to their wooden cabinets to limit local lw/mw interference. |