How about using this balun instead--TC1-1-13M+

Beware of cheap underperforming clones

As of 2022 there are many badly performing clones on the market. V2/3GHz NanoVNA uses parts like ADF4350 and AD8342 which are costly and clones have been cutting costs by using salvaged or reject parts.

See official store and look for V2 Plus4/V2 Plus4 Pro versions only to avoid getting a bad clone. We have stopped selling V2.2 versions since October 2020, so all V2 hardware that are not Plus or Plus4 are not made by us and we can not guarantee performance.

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How about using this balun instead--TC1-1-13M+

593799546myl 2021/03/13 10:35

I read your design and it is completely open source, It is very commendable.
I noticed that you use two 617DB-1023 = P3. I don't understand the purpose of this design. Maybe it is to compensate for physical asymmetry?
In that case, can it be replaced by TCM1-63AX+, it is a physically symmetric structure, and its cost is much higher, but I also noticed that TC1-1-13MX+ seems to be physically symmetrical too.

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