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| The main electronic board is below a transparent hemispheric dome. The only active electroinc components are one IC and 6 transistors; the small trimmer seen upper right adjusts the detecting capabilities. | |
| Total images: 9 | Help | |
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| The main electronic board is below a transparent hemispheric dome. The only active electroinc components are one IC and 6 transistors; the small trimmer seen upper right adjusts the detecting capabilities. | |
| Total images: 9 | Help | |