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Retro HB: home-made projection type tuning scale (+ slow motion drive) ?
Do you know of anyone using a transparent scale scale + lamp + lens +
screen to PROJECT the tuning scale in a homemade device? This would be so retro cool! I'd even be tempted to write in the names of a selection of broadcasters, coastal stations, nets, QPR windows, USN fax, GCSS, whatever.... I'd rather not mess with film and sprockets (a la Racal, was it?), while I would ask the local glass shop to cut me a glass pane disk to my liking, like a foot across. As an added benefit, the disk itself would be rigid and stable enough to act as slow motion drive: I would turn it through a standard sized rubber covered shaft leaning against its rim, with some nice big knob on it. For the scale proper, I'd start with a log scale using one of a number available free programs, print it on a transparency, and maybe add frequency marks (& icons, logos, etc.?) manually in a later version. |
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