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.

NanoVNA V2 Forum

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David Eckhardt 2021/01/29 22:24

With all my recent measurements of CMCs, I've been encouraged by several
readers to put together a procedure for the various measurements I've made
with the HP 8753C, but using the NANOVNAs and SAVER. The attachment is the
first installment which presents a procedure using the NANOs and SAVER to
measure the DM loss through any CMC. It is also useful for measuring other
two-terminal transmissive devices such as filters, attenuators, active
stages, and.......

Have a look at my first cut. I'd invite anyone to make suggestions to make
things clearer and/or correct any errors I've made in the write-up. Have a
read of the attachment.

The next installment will address measuring the bulk CM impedance presented
by the CMCs using the NANOs and SAVER (another day, please) which have been
previously measured using the HP equipment.

Dave - WØLEV

Don Bomer, W5MML 2021/01/29 16:33

Excellent Dave! Thank you for your many posts on this matter.
73, Don...W5MML🤠

On Fri, Jan 29, 2021 at 4:25 PM David Eckhardt <>

Dragan Milivojevic 2021/01/30 01:25

There should be a note in the beginning that the Nano itself
should be left in an uncalibrated state or calibrated for the desired

Measure just the parallel line without the core to determine the loss of
the line?

On Fri, 29 Jan 2021 at 23:25, David Eckhardt <> wrote:

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