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OK0EPB (exact pendulum beacon) edit / delete
Radio beacon using a pendulum clock. Very neat!
to beacon clock pendulum radio timekeeping ... on 19 June 2012
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| - pendulum | |
| 1 | + beacon |
| 1 | + clock |
| 1 | + radio |
| 1 | + timekeeping |
tasty by Adam Sampson.