In this video we mount the 9:1 unun / balun matching transformer and build a reel wind-up random wire antenna using a chalk line. Either an internal or external tuner is required to make this random wire antenna resonant.
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👉 If you haven't watched the previous video that goes through the build steps for the 9:1 unun, here is the link: https://youtu.be/AUwMCJKpm4M?si=Yt62iYf7ZlfiQsI7
👉 How to build a CMC Common Mode Choke - https://youtu.be/ldls_9dKI9M?si=hvIyCiLfvesgpQYx
This video is one in a series that shows how to build unun / baluns using different types of windings, cores, and capacitors for the matching transformer. After the step by step builds we do various measurements and field tests.
👉 For other how to videos featuring baluns, ununs, chokes, or filters - https://www.youtube.com/playlist?list=PLVGuFAwp8kOWsi1w5k5xniGaTXuA_fl6N
👉 For other how to videos on DIY homemade antennas - https://www.youtube.com/playlist?list=PLVGuFAwp8kOWRIgOz_qUMrdTA1wsWmja0
👉 For other videos on how to use the NanoVNA - https://www.youtube.com/playlist?list=PLVGuFAwp8kOWiuZ0zH4BMaP0w7tMB31Tz
Thanks for watching and 73's.
Jerry
KM4ZKB
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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*Source for Fair-Rite 2643251002 toroids* (No commission)
https://www.digikey.com/en/products/detail/fair-rite-products-corp/2643251002/8594030?s=N4IgTCBcDa4GwBYDMYCsBGADJiBdAvkA
*Source for TDK capacitors - Mouser Electronics* (No commission)
https://www.mouser.com
Mouser part # 810-CC45SL3FD101JYVN
MFG Part No: CC45SL3FD101JYVNA
Description: TDK D: 8.5mm 3kV 100pF S / Ceramic Disc Capacitors
Thanks for watching!
*Chapters*
00:00 Intro
00:24 Mount 9:1 toroid to backer board
15:01 Start build of reel wind-up random wire antenna
33:01 Random wire antennas are not resonant
33:49 Measure antenna and trim to length
37:47 Setup random wire antenna for field test
39:49 Measure and test antenna with NanoVNA
41:21 Using external tuner to tune random wire antenna for 80 meter band
46:04 40m band tune
47:48 20m band tune
50:36 17m band tune
52:04 15m band tune
53:16 12m band tune
54:08 10m band tune
56:36 Summary
56:53 Outro
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#hf #hamradio #9:1 #unun #balun #antenna #howto #hfradio #randomwire #wireantenna #matching #transformers #transformer #reel