To: | <tentec@contesting.com> |
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Subject: | [TenTec] Values of filter capacitors? |
From: | geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer) |
Date: | Sun, 02 Dec 2001 14:24:48 -0600 |
In the ladder filter that Tentec uses, the crystal frequencies determine the center frequency, while the capacitors determine the bandwidth. The larger the capacitors, the smaller the bandwidth. There can be a little shuffling of crystal frequency to refine the filter response curve. 151 is 150 pf 360 is 36 pf 510 is 51 pf 271 is 270 pf 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson. Reproduction by permission only. |
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