Create a Band Reject Filter using just Coax: Shorted Stub Version (049b) скачать в хорошем качестве

Create a Band Reject Filter using just Coax: Shorted Stub Version (049b)

Let's build a Band Reject Filter using just coax! There are two ways to do this. In the first video I showed you how to do this with an OPEN stub. This was the easiest way. In this video, I will show you how to create a Band Reject Filter using a SHORTED stub. We can get some pretty amazing rejection with it! Admittedly, they are not not narrow band filters by any stretch of the imagination. Promised LINKS: -------------------- Smith Chart - Downloadable FREE Complete Smith Chart https://www.scribd.com/doc/57547182/S... SPEED OF LIGHT VALUES 11802.85E6 inches/sec ... 11802.85 mega-inches/sec 29979.24E6 cm/sec ... 29979.24 mega-cm/sec Time Markers for Your Convenience ---------------------------- 00:05 Introductory Comments 01:38 How do they work? 01:42 Single Stub 03:48 Double Stub 05:43 Designing One 05:48 Know Your Materials 06:42 Determine your Frequency (fo) 06:52 Calculate Cable Lengths 07:45 DEMO: 250 MHz Miscreant Signal 08:12 Designing the Filter 10:26 Cutting the Coax 11:06 The Actual Build 11:18 Creating the Shorts at the end of the Stubs 12:02 Performance 12:31 Tuning the Filter 15:04 Adding Adjustability/Shortening the Stubs 15:31 How? 17:54 How to Design one 18:23 Smith Chart Assumptions 18:48 Two ways to approach the design ... 19:36 DEMO: 90.9 MHz FM Broadcast Signal 20:17 Some good advice ... 20:48 DESIGN with WAY #1: Step-by-Step 24:16 DESIGN with WAY #2: Step-by-Step 28:17 Performance and Tuning 29:51 Final Comments and Toodle-oots -----------------------------