Differences
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221 [2007/10/24 12:49] n5na |
221 [2011/12/02 11:39] n1eu [Additional Information] |
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| ====== 9 MHz 6 Pole 250 Hz Crystal Filter Model 221 ====== | ====== 9 MHz 6 Pole 250 Hz Crystal Filter Model 221 ====== | ||
| - | Special 250 Hz filter with the passband centered on 500 Hz rather than 750 Hz. Same as 219 except for the passband. | + | Special 250 Hz filter with the passband centered on 500 Hz rather than 750 Hz. Same as 219 except for the passband frequency. |
| ===== Specifications ===== | ===== Specifications ===== | ||
| | Center Frequency | 9.000500 | | | Center Frequency | 9.000500 | | ||
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| This is not a "one-time" offer; we will be stocking this filter as a permanent | This is not a "one-time" offer; we will be stocking this filter as a permanent | ||
| addition to the line. | addition to the line. | ||
| + | |||
| + | //(note: my #221 filter has a measured center freq of 450hz - N1EU)// | ||
