Building a Common Mode Choke step by step. How to keep RF out of your shack.
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73's
Jerry
KM4ZKB
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*Version 3 Specifications:*
Since the original video there has been even more testing and tuning and some of the driven element lengths have changed in order to reduce the SWR even more. The original still works well but for even lower SWR on all bands, use the lengths in the chart provided here at this link:
*Link to Poor Man's POTA PERformer v.3 antenna wire lengths*
https://drive.google.com/file/d/1s49tTAAhWv7t9O7iSi4vJsp320DCjv0B/view?usp=sharing
Enjoy!
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A list of links is provided below if you would like to purchase anything seen or mentioned in this video. If you buy through these links I will earn a small commission on each sale which will help to support the channel to provide more videos. It will not affect the price you pay.
*Amazon Affiliate Links*
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Thanks for watching!
*Chapters*
00:00 Intro
00:49 Start build
01:28 Parts used in build
05:22 Parts List
07:15 Purpose of Common Mode Choke
08:34 Test rig setup
09:57 Test coax and show how turns affect choke
13:31 Winding the choke
17:51 Testing the choke
20:44 Prepare and mount choke to plastic
27:33 Solder connections
33:40 Test completed choke
34:10 Test results
36:12 Hot glue to protect coax connections
38:34 POTA Park Activation
40:56 Install choke
41:39 Antenna Resonance in 20m configuration for 10m?
42:32 QSO's on 20m
44:22 QSO's on 17m
47:48 Outro
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#commonmodechoke #hf #hamradio