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If I connect the NanoVNA-H to a length of coax (about 20m of RG-11/U in this case) and perform an SOL calibration through the coax, will the NanoVNA then show me the feed point characteristics of the antenna to which the load end of the coax is connected?

Are there any other special settings that must be made?

Update from Mike, K0JTA:
Picked up and processed May 6 in Hong Kong via DHL, and is now in "CINCINNATI HUB, OH - USA" at this time!!! -Looks as if I will have the shipment in hand VERY soon, unless there is a US Customs delay!!! (Woo-HOO!)
--
*Mike* , K0JTA
?袄冲(ツ)冲/?

How about the rampant misuse of "your" and "you're"?

---?
Ciao baby, catch you on the flip side
??
73 de W3AB/GEO ???



You can say "over", you can say "out", you just can't say "over and out".

On Mon, May 18, 2020 at 12:09 PM, DiSlord wrote:

...Add Brightness setting to config menu. Now for set Brightness need select Config->Brightness and use leveler button Left or Right for adjust it. On done press leveler button Down for set. For save value need use Config->Save.

...Fix calibration reset error added in last patch, now this should work correct. Possible made calibration and not reset old calibration data, just disable
correction (not made reset) and made another calibration.
Open - Short calibration depend from self, need recalibrate it together.
Load calibration possible made alone
Isoln, Thru also depend from self, need recalibrate it together.
======================================================
DiSlord,
1. Thanks for adding the brightness menu back into the -H4 firmware. Changing and setting the brightness level using the lever is much more intuitive than using the keypad.

2. The calibration shortcut of turning off "correction' instead of Using "reset" is clever. I often need to re-do my THRU calibration with a different cable without losing my SOL calibration. The disable "correction" short cut worked great for this.

3. My CH1 noise floor terminated with 50 ohms looks very good up to 1500 MHz (see attachment). After the 5th harmonic of 260 MHz (1.3 GHz) actual measurements start to worsen, but I have a NanoVNA-V2 for measurements in that range.

4. Measurement of a 40 dB attenuator was fine up to 1500 MHz using your previous suggestion of using the DUT as a terminator for CH1 when doing the isolation calibration (see attachment).

Thanks again for your many contributions.

- Herb

What's a Grocer's Apostrophe? (humor)

--
73 de Rich NE1EE
On the banks of the Piscataqua

I purchased mine from

as suggested by members of the microwave group I'm a member of.

Delivery was less than a month.

---?
Ciao baby, catch you on the flip side
??
73 de W3AB/GEO ???



You can say "over", you can say "out", you just can't say "over and out".

R&L said that there may be H4's stock this week!

randy.ab9go@...


This message sent to you from my mobile device via speech-to-text
technology.

I also always upload last stable version of my firmware to:

nanovna-users@...>Files->Dislord's Nanovna -H Firmware

/g/nanovna-users/files/Dislord%27s%20Nanovna%20-H%20Firmware

Last NanoVNA-H is v0.8.4.5 at Apr 30
I not update H variant (most changes is H4 hardware depend, like ADC for touch, Brightness, gain settings, flash latency and e.t.c)

On Mon, May 18, 2020 at 01:40 PM, Oristo wrote:

Next H4 update

Added Wiki links: /g/nanovna-users/wiki#Sources
.. for -H and -H4 dfu appends, as well as H4 Hardware.py
The most recent NanoVNA-H found was from Apr 30..?
Those links will need updating when new DFU file appends are messaged..

Next H4 update

Added Wiki links: /g/nanovna-users/wiki#Sources
.. for -H and -H4 dfu appends, as well as H4 Hardware.py
The most recent NanoVNA-H found was from Apr 30..?
Those links will need updating when new DFU file appends are messaged..

I use standart case for NanoVNA-H and iPhone 5s battery on 1560mAh (height 3.5mm) many phone battery have height 3-3.5mm and can be put in this case.

On 5/18/2020 3:22 AM, M Craig Leftwich wrote:

I wanted to add a larger capacity battery to my NanoVNA and protect it from getting damaged, so housed my device in an enclosure from Standard Supply Electronics obtained at .
It is nearly the perfect size, once you take a Dremel tool to it to remove some of the excess mounting slots and standoffs. Removed the front plate and mounted directly into the top of the case, in which I made a cutout for the display, using the NanoVNA frontplate as a template, and using the original screws (had to countersink the holes a bit to accommodate the screw heads to be flush to the surface; the enclosure was a bit thicker than the PCB frontplate). I cut up the original front plate to retain the labeling and attached the 2 label sections to the top of the enclosure. Cut slots in the sides to make holes for the USB-C, and Power and Control switches (countersink the area around the Power switch for better access). The case has a separate panel for the coax connectors to go through, it was a simple task to measure and drill these holes.

The 1000mAh battery mounted to the back of the original NanoVNA backplate using some double-stick tape. Drilled a couple holes in the original backplate to accommodate the mounting screws for the enclosure bottom (had to find some shorter screws from an old used enclosure. The screws that came with the enclosure could be used if you are skilled at cutting down screws ( I cut mine too short). The standoffs for the enclosure bottom mounting screws should be trimmed to be slightly above the surface of the NanoVNA backplate for a more secure fit of the enclosure bottom.

Overall, I was amazed at how well the it fit. Even the divide between the enclosure halves were perfectly positioned to avoid the extra work of having to mill holes for the connector and switches. If anyone would like pictures and more detailed instructions. Let me know and I will be happy to ablige.

If anyone wants good project boxes, MPJA has a nice assortment at reasonable prices.
<>


--
All the Best & 7 3s
Dale Miller, KC2CBD
Cookeville, Tennessee
Putnam County TN ARES
Emergency Coordinator
Vice President Cookeville Repeater Association
Ham Operator since 1997 (Extra)

stpatrick2@...
Registered Linux User: #317401
Linux since June 2003
Registered Ubuntu User #26423

--



--
All the Best & 7 3's
Dale Miller, KC2CBD
Cookeville, Tennessee
Putnam County TN ARES Emergency Coordinator
Vice President Cookeville Repeater Association

Ham Operator since 1997 (Extra)
kc2cbd@...

Registered Linux User: #317401
Linux since June 2003
Registered Ubuntu User #26423

Here's one I got from an Ebay seller name Rexroillc.? It was $12.99

I've seen an enclosure a fellow ham friend has that has his callsign on it.? I don't know where he got it though.

73

Stan
KM4HQE

it's not just China. I ordered something in April from an individual in Brisbane, Australia. He gave it to their Postal Service for express air, and it sat "awaiting departure" for a solid month.

If the item shipped via Hong Kong, which a lot do, highly likely the hold up is there. One of the postal options seems to be it has no priority and will get put on a plane if there's space. Often this type gets forgotten and lies around in a depot until someone queries it. Chase the supplier up, they can find out what's happening and expedite.

Next H4 update:
Cleanup ADC code (used for touch screen and battery measure).

Reduce touch press check from 1kHz to 20Hz and set touch press ADC time to 1 tick (it allow little more reduce measure noise), for vbat, touch X and Y measure use bigger ADC time.

Add Brightness setting to config menu.
Now for set Brightness need select Config->Brightness and use leveler button Left or Right for adjust it. On done press leveler button Down for set. For save value need use Config->Save.

Fix calibration reset error added in last patch, now this should work correct

Possible made calibration and not reset old calibration data, just disable correction (not made reset) and made another calibration.
Open - Short calibration depend from self, need recalibrate it together.
Load calibration possible made alone
Isoln, Thru also depend from self, need recalibrate it together.

Add some measure screenshots

R&L. Still $59.95 for the H4 but out of stock,



The H is in stock for $49.95



If you want the H4 you might want to check and see when they will have more.

Vince - K8ZW.

--
K8ZW

i got my from Amazon it the new one comes with battery,
Its working great and i got it in less than a week, if you need a link let me know.

There are several great case designs for the smaller NanoVNA for 3D printers on Thingiverse. I printed one and it fits like a glove. There are several designs for building cases that protect the fragile SMA connectors as well as designs to hold the calibration devices.

73 de Jim Parks, NY0J

Mark,

If you are just measuring SWR on HF antennas you can do the calibration from 1 to 30 MHz. on the CH0 SMA connector and store it in one of the memory slots 1-4. Then just recall it after powering up. You then use Stimulus to zoom in on the band of interest (40m, 20M etc.) and the NanoVNA interpolation routine will take care of it. Attached is a file showing what happens with different calibration settings when measuring SWR. Note: I am referring to SWR measurements ONLY here.

Roger

Ordered the NanoVNA-H 4 from Amazon on 5/14, shipped on 5/15, arrived 5/16.

Now I just have to figure out what to do with it.

Michael WA7SKG


Arnie Merrick via groups.io wrote on 5/18/20 9:56 AM: