I don't think anyone has mentioned the radio museum at Hoswick on mainland Shetland, run by Cecil Duncan GM0EKM. It's some years since I visited and met Cecil, and now I have retired from sea I may not be up that way again, so I hope that Cecil is well and the museum is still going?
http://www.shetlandheritageassociati...visitor-centre
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Roger/G3VKM