| An interdigital filter for the 23cm band - PA4DAN |
| An interdigital filter for the 23cm band - PA4DAN http://www.i1wqrlinkradio.com/antype/ch41/chiave8.htm  |
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| An interdigital filter for the 23cm band - PA4DAN |
| An interdigital filter for the 23cm band - PA4DAN http://www.i1wqrlinkradio.com/antype/ch41/chiave8.htm |