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271 [2007/02/19 20:29] n5na |
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- | ====== Crystal Model 271 ====== | ||
- | {{xtal.jpg?100|}} | ||
- | ===== Description ===== | ||
- | Optional plug-in crystal to add the 15 meter band, 21.0 - 21.5 MHz, to the Century 21 Model [[570]]. Later models included this crystal. |