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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:37, 17 April 2020 | 1,068 × 646 (2.63 MB) | Mary Mark Ockerbloom | == {{int:filedesc}} == {{Photograph |photographer = Herb Radin and Associates |title = Beckman Model 61 Potentiometer (Cermet Screening) |description = 5. Steatite substrates are placed into precision machines which automatically silk screen the precious metal conductive materials for the slider and end terminations. Substrates are then fired to temperatures in the range of 1,500 to 2,000 °F in tunnel kilns. The cermet resistance materials, composed of gla... |
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