Youtor
Trapped Antenna Design amp Build 008g1
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=8T6aldrwKak
This video is about the stuff that goes into the successful design of a trapped antenna. I show what kind of effects the Resonant Frequency, Q and Capacitance Value associated with the traps have on the overall antenna system poerformance. • I show the three most common kinds of traps that are used: • Discrete Inductor Capacitor • Coaxial • Self-Resonant • I show how to tune your traps. • From some viewers ... I will add more as they trickle in. • do not forget to pay attention to the voltage current rating of the capacitor. • adjust the L/C ratio so it resonates between the two bands and adjust the antenna to work for both bands. This reduces to voltage that will appear across the traps (and the trap capacitor). • I have provided all the files that you might need plus some extras ... see the links below. • === PROMISED LINKS === • Coaxial Trap Calculator Link • https://www.qsl.net/ve6yp/coaxtrap.zip • Self-Resonant Trap Calculator (spreadsheet) • https://drive.google.com/file/d/10iXi... • I put it in a ZIP file so Google wouldn't try to open in in Google Sheets. • Self-Resoant Trap Website • https://squashpractice.com/2021/01/10... • Coil Winding Spreadsheet that I created for myself and use • https://drive.google.com/file/d/1AdrS... • I put it in a ZIP file so Google wouldn't try to open in in Google Sheets. • Time Markers for Your Convenience • ---------------------------- • 00:05 Introductions • 01:35 The World of Antennas • 02:23 DEFINITION: Antenna Bandwidth • 03:32 A Symmetrical Dipole Antenna • 03:48 Trapped Antenna Defined • 04:15 Traps - the Multiband Magic • 04:35 What are Traps??? • 05:30 What are Traps made of? • 05:54 Trap Design Considerations • 06:20 Resonant Frequency • 06:51 The Experiment • 07:20 Observations • 07:22 Best SWR • 07:28 Bandwidth • 07:50 Quality Factor (Q) of the Trap • 07:56 Q Defined • 09:53 The Experiment • 10:20 Observations • 10:22 Best SWR • 11:01 Bandwidth • 11:25 Capacitor Value • 11:47 The Experiment • 12:27 Observations • 12:28 Best SWR • 12:38 Bandwidth • 13:06 OVERALL • 13:45 Types of Traps • 13:53 Discrete Inductor Capacitor • 15:02 Coaxial Traps • 16:03 Self-Resonant Traps • 17:16 Choosing Your Trap Design • 18:14 Modeling Requirements • 18:44 A Leg Up on Building the Antenna • 19:39 How to Tune a Trap • 22:41 Final Comments and Toodle-Oots • -----------------------------
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