Crystal Ladder filter


Dan Watson writes:

Here’s a little board for making a four pole crystal ladder filter.
This type of filter has a very high Q and narrow bandwidth, allowing you to select a specific frequency from your signal. Because of the narrow bandwidth, selection of the capacitors and tuning of the filter is important to achieve the desired response. You will want to test your filter after designing and assembling it to verify performance.

Project info at The Sync Channel blog.

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