[GCARC] NanoVNA H4 Upgrades

[Kenneth Bozarth]

I am a Nanovna user, have the original -F model, which is nice. I recently
bought the new SV4401A, which has a 7" screen, N connectors and a ton of
internal memory. It is great for the bench but I would not carry it up a
tower or ladder. I got mine from Aliexpress for $299. DX Engineering is
gouging users at $599. There are issues with the first release, which have
been addressed, the main one being that the unit will not boot with a fully
changed battery. A SMD resistor change (easy to do) fixes that. The
nanovna-user app for that model is very poor; hopefully they will improve
it. The app is finicky with Win10 systems, may not run at all. But the
internal storage is great and you can save images to upload to your PC. If
anyone has further questions feel free to contact me.
Ken, KN2U

On Tue, Dec 6, 2022 at 8:58 AM Christopher Prioli AD2CS <cpprioli at gmail.com>
wrote:

> For a limited time only, I am offering SD Micro card reader upgrades to
> owners of NanoVNA H4 devices.  This upgrade is one that allows screen shots
> and data traces to be stored to a disk file completely within the NanoVNA,
> without the need to be tethered to a computer running VNA Saver or a
> similar application. The cost for this limited-time offer is a flat twenty
> dollars, which includes the SD card slot, modification of the enclosure to
> provide access to the card slot, and a 32GB SD Micro card.
>
> There are some things to be aware of...
>
>    - This update applies ONLY to the NanoVNA H4
>    - The update can be performed ONLY on those NanoVNA H4 devices that have
>    the card slot provision on the PCB.  A quick removal of the cover and a
>    look at the PCB will tell you if the update can be applied to your
> device.
>    I can look at it if you do not want to open up your device.
>    - The rate is available ONLY when the NanoVNA H4 is in a plastic
>    enclosure.
>    - The update also requires a firmware update if your existing firmware
>    does not support the SD card. The firmware update will be done if
> required
>    as a part of the installation process.
>    - The date and time will be set into the device at the time of
>    installation, as these factors are used for the NanoVNA H4 file naming
>    convention.
>
> When completed, you will be able to save screen shots and trace data to
> disk files on the SD card, which can then be read in a standard computer
> for use of the data as you please.
>
> If you are interested in having this upgrade performed on your NanoVNA H4,
> let me know and we can make arrangements to perform the upgrade.  It is a
> useful upgrade, and I have done several of these already.
>
> 73
>
> -- Chris   AD2CS
> ------------------------------------------------------------
> Christopher P Prioli
> 648 W Holly Ave
> Pitman, NJ  08071
> 1-856-689-6783
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