HAM RADIO: The 64:1 EFHW Transformer build. 49:1 and 64:1 UnUn builds

HAM RADIO: The 64:1 EFHW Transformer build. 3 turn primary 21 turn secondary giving a total of 24 turns making this Transformer a 64:1 ratio (24/3=8, 8x8=64) However, this one has a 3 to 24 turn rate as a pose to my other 64:1 that has 2 to 16 turns. will this Transformer perform better than the other one, well we will find out in the next video, this one is all about the build.
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Cheers
Mike - M0MSN
P.S. do not take my word for it, give it a go for yourself.

[@JxH]

For those confused why 8:1 turns ratio becomes a "64:1" transformer, it's because the voltage ratio is in proportion to the turns ratio, and the current ratio is in inverse relation to the turns ratio, so the IMPEDANCE ratio is in proportion to the turns ratio SQUARED. In this example, the voltage on the secondary will be 8x higher, and

[@pcmultimedia1]

Would ,like to see a sweep with a VNA .

[@seanking7221]

Thanks for this video and detailed explanation of how everything connects.

[@seanwood8043]

Excellent craftsmanship as always Mike ! Keep the videos going they are worth waiting for .

[@randalweil8762]

Thank you

[@alexdokic5567]

Hello Mike, enjoyed winding this Transformer this morning and getting tangled up in wire and twine! Measure twice cut three times haha! I used 2mm wire but forgot that twisting the wire shortens it a bit, third time success. That’s a great way to twist the wire with a drill. 2mm wire is the absolute max to use although winding it wasn’t too difficult. Thanks for your videos on previous projects. 73 Alex M0KVA

[@2e0txe]

Fantastic build! Looking forward to the testing before I wrestle with the wire hahaha!

[@Capt_Duffy]

What a beautiful piece of work... 👍👌

[@W6IWN_Radio]

Beautiful work!

[@garyh8315]

Great vid Mike, I have been looking at building a 49:1 for /p on holiday. This looks really nice though in the clear lid box.

[@Joe-KN4IFI]

Nice job Mike. I sure do like the clear top case. Every time I go out and check my EFHW I have to take the cover off. The clear top case would make checking my EFHW so much easier. 73 Joe

[@MrLittlmike22]

amazing video - soso helpful!

[@M0PQA]

Excellent video. Very educational. Please do the LED version.

[@EA8CVZ]

Gracias por el vídeo. Un like para tí.

[@jeansalomon371]

Great !!!

[@brentjohnson6654]

I have ordered the EFHW 8010 kit from HF kits via ARRL. I have been interested in the EFHW for portable work as it can be resident on all the bands. I will need to make decisions on the low bands (SSB or CW) because of the high Q factor. Nice build

[@JBud1911]

NICE JOB KR6BJ , John

[@Oregun]

Nice job!

[@DonDegidio]

Hi Mike,

[@JxH]

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