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272 [2007/05/21 00:41] |
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| + | ====== Crystal Model 272 ====== | ||
| + | {{xtal.jpg?100|}} | ||
| + | ===== Description ===== | ||
| + | Optional plug-in crystal to add the 10 meter band, 28.0 - 28.5 MHz, to the Century 21 Model [[570]]. Later models included this crystal. | ||
