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No, jog wheel does not move anything in the drop downs, but yesterday it did move the cursor horizontally.
I have tried to re-calibrate the touchscreen. Although, I'm not sure that helps with sensitivity.
Darn thing might be getting worse since yesterday, It may take 20 taps to get out of the Trace 0, 1, 2, drop down,
but then I'm in a loop with either Trace 0, Trace1, Trace 2, or Trace, Format, Scale, etc.
I'll pull the cover and try the connector.
Thanks for the input, Mikek

No, a firmware update probably will not help with this (but it would give you lots of other updates and features).
Can you get to the menu items properly using the jog wheel?
First try to re-calibrate the touchscreen - I don't remember how that is accessed in your version of firmware, perhaps under 'config -> touch cal', or maybe you have to do a factory reset, and then it is the first thing that comes up.
If that fails, you may have a hardware issue - maybe just need to re-seat the cable that goes from the main board to the touchscreen.
I hope this helps - good luck
Stan

I'm having great difficulty navigating between drop downs on my NanoVNA-H 4 edy555 design version 0.5.0.
First thing, I thought the first, 'about screen' disappeared after a short time, mine doesn't. If I tap the screen I get Display, marker,
stimulus, etc. I tapped or held and got trace. format, scale, etc. Then I tapped Format and got trace 0, 1, 2, etc. that's not correct.
Now tapping back only causes the grid to come and go with each tap. I did tap trace 0 and it did bring up the yellow Ch 0 in he upper left.
But back just keeps cycling the grid on and off. If I tap back enough it finally goes back to Trace, Format, Scale, etc. I can not get format to show.
It seems to know when the screen is tapped, but it doe not make the change as expected.
Would a firmware update help this?
Any thoughts?
Thanks, Mikek

Hi All
If it is really worth to replace the Chinese MS5351 by the Silicon SI5351a in my H4 SEESII Hardware 4.3_MS .

Thanks
73's Nizar

All,

It's that time of year again when we need to pay the annual $220 fee to keep the group going. The payment is due? the 18th and will be automatically paid by me.

Once again I ask that anyone who can contribute a few dollars is encouraged to do so. Here are the guidelines:

1. Every donation is appreciated by the group.

2. I will keep a log of all donations in chronological order. Assuming that the donation total reaches the $220 amount necessary, I will let the group know that we have enough to pay the fee.

3. Any donations that are made after the $220 goal has been reached will be returned. I do not have a good way to bank or track excess funds. Excess donations usually occur because of emails crossing in time, or me just getting busy.

4. All donations should be paid to me using PayPal "Friends and Family" (I am not making any money on this, obviously). My PayPal account is the same as my email address - kc0wjn at gmail dot com.

5. All donations will be kept in my (non-interest-bearing) PayPal account until I have paid the fee, after which time I will transfer the donated funds to my bank account.

6. In the past I have tried to personally acknowledge every individual contribution. I'll try to do that again this year, but I may not be able to for various reasons.

Thank you.
Dave Daniel, co-owner


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Thanks for the schematic.

// HIRO, JJ1FXF

Order new H4 or you can install slot as on new devices and use last firmware

Thanks for your reply, DiSlord-san.

My 2.8” NanoVNA-H is without microSD card slot.

Or any mod to add the one?

// HIRO, JJ1FXF

You can use unlimited calibration slots if save/load on SD card.

Hi, all.

I'm HIRO, JJ1FXF and I just joined this group today cause I'm also looking for some simple menu firmware of my NanoVNA-H.

Since the 2.8" screen is becoming too small for my age, so I will have a 4.3" screen hardware.

Then I would like to use 2.8" one for field use to check only the SWR of antennas on various HAM frequencies. I don't wanna configure NanoVNA on the field so I'd like to complete and save all configurations such as 1.8-1.9, 3.5-3.6, 3.7-3.8, ... in advance while I'm home.

Is there any mod or version of firmware that measures SWR only but has more configuration save area, like 10 or 15?

Thanks for your advice.

HNY es 73/88,

// HIRO, JJ1FXF

You can set the frequency to output on one frequency but you can’t set the level. It is much higher than -73 dBm so you need attenuators and a way to measure that level so you can adjust the attenuation

The Tiny SA Ultra has this ability, to generate a signal on a precise
frequency, at a very precise, calibrated level. Use that. -- Rich

On Wed, Jan 8, 2025 at 9:25?AM M0KCB via groups.io <qsl.m0kcb=
[email protected]> wrote:

Hello

I am looking to use my H4 to generate a signal on HF at -73db and -70db to
do some calibrations after a firmware update on a my receiver.

Some Nanovna have a tab called "Signal Generator" but the H4 does not (or
I can't find one).

I Can generate a signal on the frequency wanted by setting the start and
stop to the same frequency and can hear the signal on the receiver but is
it possible to somehow control the output precisely?

It is possible to use the Power setting but they are preset and the only
options are "Auto, 2mA, 4mA, 6mA,8mA" and not what I want.

Thanks for any help

73 M0KCB

Hello

I am looking to use my H4 to generate a signal on HF at -73db and -70db to do some calibrations after a firmware update on a my receiver.

Some Nanovna have a tab called "Signal Generator" but the H4 does not (or I can't find one).

I Can generate a signal on the frequency wanted by setting the start and stop to the same frequency and can hear the signal on the receiver but is it possible to somehow control the output precisely?

It is possible to use the Power setting but they are preset and the only options are "Auto, 2mA, 4mA, 6mA,8mA" and not what I want.

Thanks for any help

73 M0KCB

hmm .. i own a v2 (saa2n) and a v2plus4 and have made over a dozen fw upgrades on each but but NEVER used a programmer!!

connect to usb, switch on with button pressed and voila its in upload mode ...

fire up nanovna app and it reacts with " found a v2 in upload mode ... do you wanna upgrade?" ... then select bin file and bingo all works fine

(in very early days used naovna qt but nanovna app works much better in my view)

dg9bfc sigi


Am 06.01.2025 um 08:48 schrieb Georges Ringotte via groups.io:

Many YouTube vids on the Smith Chart and tutorial PDFs are available also. Have a look. A few hours and you'll know how to use the chart...

On Tue, Jan 7, 2025 at 12:29 PM, Gary W9TD wrote:

Since the OP wanted to make antenna matching circuits that are remotely
switched, he should measure the antenna impedance at the desired frequencies
with the nanovna then synthesize matching networks for those impedances to 50
Ohms. Seems the simpler path than measuring a tuner.

Great answer...

Roger

Maybe I misinterpreted his intention. I thought he was going to mount the
(indoor tuner with protection) at the antenna base and manually adjust
recorded settings as he desired. Sorry about my misread. I made it more
complicated that it needs to be.

Dave - W?LEV

On Tue, Jan 7, 2025 at 8:30?PM Gary W9TD via groups.io <w9td=
[email protected]> wrote:

Since the OP wanted to make antenna matching circuits that are remotely
switched, he should measure the antenna impedance at the desired
frequencies with the nanovna then synthesize matching networks for those
impedances to 50 Ohms. Seems the simpler path than measuring a tuner.
Gary
W9TD

--

*Dave - W?LEV*


--
Dave - W?LEV

Since the OP wanted to make antenna matching circuits that are remotely switched, he should measure the antenna impedance at the desired frequencies with the nanovna then synthesize matching networks for those impedances to 50 Ohms. Seems the simpler path than measuring a tuner.
Gary
W9TD

OK...Easy Path.

1) For one, the NANOVNA can not "read" tuner settings. You will have to
record those yourself.

2) The NANOVNA should be connected to the "rig" side of the tuner with a
SHORT piece of good 50-ohm coax (less than 2-feet long).

3) The antenna, itself, should be connected to the "antenna" side of the
tuner with a SHORT piece of good 50-ohm coax (less than 2-feet long).

NOTE: If you are interested only in 160 throughj 20 meters, the coax
lengths can be up to 3 or 4 feet long.

4) Diagramatic "tutorial" on the Smith Chart to determine resonance:

SEE ATTACHMENT, PLEASE BEFORE PROCEEDING

A) Anything above the "PURE RESISTIVE AXIS" is inductive and NOT RESONANT.

B) Anything below the "PURE RESISTIVE AXIS" is capacitive and NOT RESONANT.

C) Anything ON the "REAL RESISTIVE AXIS" is purely resistive and IS
RESONANT but may not be
at 50-ohms which you desire for a match to your 50-ohm coax.

D) ONLY THE CENTER marked in the center with the circle "50 ± j 0 OHMS" is
purely resistive and
50-ohms. This is where you need to adjust your tuner when connected
to your antenna
through the tuner to the NANOVNA. It will be a different setting of
the tuner and
NANOVNA for each frequency.

Let me know if this isn't clear enough. If you have questions, please
email.

Dave - W?LEV

On Tue, Jan 7, 2025 at 6:32?PM Paul Wolf KY4XJ via groups.io <xyroto=
[email protected]> wrote:

I am thinking to build discrete circuits for a specific non-resonant
antenna to operate on HF bands without a remote tuner. I managed to snag
one of the last MFJ-948F Versa Tuner II left in stock. (But, that's an
indoor tuner. I want the tuning done at the base on a non-resonant
antenna.) On a nice day thinking to bring the new tuner right to the
base, tune it up for a few frequencies within each band. How could a
NanoVNA gather values set on the tuner? Seems so possible to use a few
parts and do this outdoor tuning in advance and for increased power.
Smith charts are used for this matching. But, I don't know how to read
discrete values from the Smith Chart on my NanoVNA. I suppose I could also
open up the tuner, use meters for the measurement and build the same.
Whatever, I am sure that my NanoVNA will confirm whether the tuning is
correctly after an individual network is made. Please lead me down an easy
path? Maybe I just need to buy a book and learn this?

Paul - KY4XJ

--

*Dave - W?LEV*


--
Dave - W?LEV