How to build 9:1 unun for a random wire hf antenna

Video Description

How to build the 9:1 UnUn / balun matching transformer to use with a random wire antenna. This video shows step by step how to wind a 9:1 unun. 👍 *Support Budget Ham Radio channel* - https://buymeacoffee.com/budgethamradio 👍 *Be sure to Like, Share, Comment, and Subscribe*. 👉 Like this video? For more videos similar to this, click here - https://youtube.com/@BudgetHamRadio?sub_confirmation=1 This video is one in a series that shows how to build your own balun and unun matching transformers. After the step by step builds we do insertion loss tests and take other measurements as needed such as resistance, SWR, etc. As an Amazon Influencer, I earn from qualifying purchases. Some links are affiliate—meaning I may get a small commission if you buy (at no extra cost to you). All opinions are my own; I only recommend what I'd use myself. Thanks for supporting @BudgetHamRadio! **Amazon link to gear used in this video** - https://www.amazon.com/shop/budgethamradio *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 *Chapters* 00:00 Intro to building your own 9:1 unun 00:38 Build description for the 9:1 matching transformer 01:28 Toroid core size and mix type 01:58 Wire type and length needed for unun 02:40 Start winding 9:1 toroid core 10:21 9:1 wiring diagram explanation 11:24 Make winding connections 20:15 Verifying the 450 ohm load resistors 23:10 Test 9:1 UnUn with NanoVNA for impedance matching 27:23 NanoVNA testing for Insertion Loss 31:59 Summary 33:31 Outro #hf #hamradio #9:1 #unun #balun #random #wire #antenna #howto #hfradio #diy #homemade 👍 Be sure to Like, Share, Comment, and Subscribe. 👍 *Support:* https://buymeacoffee.com/budgethamradio 73 de KM4ZKB, Jerry