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Hi Hugen,

Existing plastic boxes should be rework. I think the best solution would be to increase the bolts' towers by 0.5mm, which can be glued with 4 plastic washers.
But any other distance can be a solution.
For example, a single-sided film glued to pcb, which raises 0.5 mm.
When I worked at QAM, we ensured the quality of the incoming and outgoing products. There was also an opportunity to solve the problem.
So life doesn't stop, we just see the world differently.

Good health to all.
73, Gyula HA3HZ

Sorry again for the trouble caused by our mistake, I have pasted the pillars for the NanoVNA-H4 currently on sale to temporarily solve this problem. I also received the improved shell, and I am a little bit dissatisfied. I will improve it further and use a revised version in April. If you have received a structural problem with the NanoVNA-H4 before, please contact me, and I will provide a revised shell for free. Sorry again!

hugen

On Fri, Mar 13, 2020 at 11:26 AM, Gufo Rosso wrote:

Ad9361 have 52mhz span

Being like a cost effect development board student hack-able device... looks like reading into a little more some are changing the TXCO to a 0.2ppm.

Wondering if there are better like external input capabilities (using the lab GPSDO) and using more capabilities on the chips for more performance? Looks like the sampling rate limit of the signal path is the USB 2.0, so wondering about that hack too.

Looks like the AD9361 datasheet grid array ( ) is different... plus might not be many options for other chips using a CSP BGA adapter sockets if thinking using a different chip. Checked and even on Aliexpress the socket adapters are half as much as the Pluto. First time for me looking at BGA socket adapters, interesting.

Roger,

If you are that unhappy with your purchase, contact me by email and I will buy your H4 from you.

You should probably consider buying a commercial vendor VNA that has the support, fit, and finish that you expect. Hugen's VNA offers terrific performance at a very low price but it is designed for people that expect to tinker rather than a plug-and-play product.

Cheers,
Bill

On Fri, Mar 13, 2020 at 02:00 PM, D R wrote:

What's the matter, Roger? Still don't know which end of a screwdriver to
hold? The required "fix" is well off the lower end of the scale for the
degree of difficulty involved, but all you can do is whinge because a little
too much tightness was applied to the case screws. If the solution is too
difficult for you to carry out, then send your H4 to me and I'll do it for you
FOC.

You expect to get a free replacement case for your "defective" H4? You do
realise that that would involve your having to completely remove the case
screws, thereby going well past the requirements for the simple fix? Are you
sure you're sufficiently technically qualified to carry out such an operation?

Read again what Herb posted and absorb the message!

Regards,
Dave

DR - Dave,

Herb Walker, David Eckhardt, Jim Allyn and nanovnauser disagreed with me and expressed their comments in a constructive and civil manner. I can see their point of view.

You on the other hand found it necessary to make this personal for some reason, question my technical skills and hurl insults. I guess that is just your way of communicating.

This is usually a friendly group. To keep it that way I will stop posting on this topic. Roger Need

I wasn't going to respond further, but I must. So, forgive me if I step on
anyone's toes.

Most of the buyers of the NANOVNA products have absolutely no idea what the
creators of these instruments have offered the RF community! They are so
far beyond the average "antenna analyzer" there is absolutely no comparison
at 10X the price, may even 30X!! I could name three offerings from other
suppliers that are priced between $ 350 and $ 1500 that don't even approach
the performance and capabilities of the NANOVNA offerings.

I am fortunate to have once worked for HP. At the time, HP encouraged
dumpster dipping. It was Bill and Dave's philosophy that if something
turned up in the large dumpsters and you had a good use for it, take it
home and its yours. That was the old HP (BC = before Carley, bless her
little crooked selfish self-centered heart!!). I am fortunate enough to
have acquired an HP 8753C with the associated S-Parameter test set - a VNA
(much like the NANOVNA products) that covers 300 kHz through 3 GHz with
guaranteed 100 dB dynamic range. In its day, that combination went for
something over $60,000. Maybe more as I no longer have my collection of HP
catalogs (we shouldn't mention the Nealy Sales "experiment"). The creators
of the NANOVNA products have reduced HP (R&S, TEK, ....) prices to
something around $100 that most of us can afford! After all, name a radio
we might buy, if your a ham, that costs $100? The last radio I bought,
likely my last, cost a bit over $3000. That was for the Icom 7610 and the
7300 is about $1K. These new instruments offer much of the capability that
the HP 8753C offerings. Sure, the noise floor doesn't guarantee 100 dB,
but, then, it isn't an HP piece of gear. 40 (at 1.5 GHz) to 80 (at LF and
HF and low VHG) dB of dynamic range (I refer to a typical reflection
measurement or out-of-band filter measurement) from 100 kHz (some lower
than that) through 1.5 GHz is a dream to me for all of $100 and is more
than the typical amateur can utilize!! And....... I can use them at the
antenna feed point. They even cover our newest amateur band - 2200-Meters
- which my 8753C does not.

So.......quit the belly aching and learn to use the instrument. These
online groups are here to help you learn, not belly ach.

And, once again, thank you guys and gals in China who created these
instruments for a job well done and appreciated!!!! Wish I could give all
of you a big hug. You've done all of us RF types a *major* favor!!!!!

So, quit the belly aching and learn to use the devices. Sincerely learning
how to fully utilize a vector network analyzer will teach you so much more
about our hobby of all things RF than any undergraduate text book on the
subject possibly could.

Dave - W?LEV

<>
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On Fri, Mar 13, 2020 at 9:29 PM Jim Allyn - N7JA <jim@...>
wrote:

On 3/13/20 11:21 AM, Roger Need via Groups.Io wrote:

Why should customers have to start fixing a new product that they

purchased? Any reputable suppler stands behind their product.


Maybe you should start looking at Keysight or Rohde and Schwarz
network analyzers. They start at about 250 times the price of the
NanoVNA and up - WAY up.







I consider the NanoVNA to be a bargain. It's not the equivalent
of a Keysight or a Rohde and Schwarz, but then it's only 50 bucks. And
the NanoVNA design is open source, you could start manufacturing them
yourself with better build quality.

--

*Dave - W?LEV*
*Just Let Darwin Work*
*Just Think*

On 3/13/20 11:21 AM, Roger Need via Groups.Io wrote:

Why should customers have to start fixing a new product that they purchased? Any reputable suppler stands behind their product.

???? Maybe you should start looking at Keysight or Rohde and Schwarz network analyzers.? They start at about 250 times the price of the NanoVNA and up - WAY up.





???? I consider the NanoVNA to be a bargain.? It's not the equivalent of a Keysight or a Rohde and Schwarz, but then it's only 50 bucks.? And the NanoVNA design is open source, you could start manufacturing them yourself with better build quality.

I bought mine from Gigparts - yes it costs more but I have a 1 year
warranty on the thing. Caveat Emptor!

73! Mark KA6WKE

Latest Video:
Website:



On Fri, Mar 13, 2020 at 11:21 AM Roger Need via Groups.Io <sailtamarack=
[email protected]> wrote:

On Fri, Mar 13, 2020 at 06:17 AM, D R wrote:

Much ado about nothing: simply slacken the case screws a little to

relieve the

pressure on the display, and the problem will disappear.

Why should customers have to start fixing a new product that they
purchased? Any reputable suppler stands behind their product.

Hugen has not replied to my earlier question to him about what he intends
to do about the defective units that have been shipped. I have recommended
the Hugen product to multiple people on The Facebook NanoVNA User group but
sadly will stop doing that now....

Roger

What's the matter, Roger? Still don't know which end of a screwdriver to hold? The required "fix" is well off the lower end of the scale for the degree of difficulty involved, but all you can do is whinge because a little too much tightness was applied to the case screws. If the solution is too difficult for you to carry out, then send your H4 to me and I'll do it for you FOC.

You expect to get a free replacement case for your "defective" H4? You do realise that that would involve your having to completely remove the case screws, thereby going well past the requirements for the simple fix? Are you sure you're sufficiently technically qualified to carry out such an operation?

Read again what Herb posted and absorb the message!

Regards,
Dave

no mater what faults and niggles the nanovna's have imagine going back to a gdo or mfj 259??,cant knock them,as far as im concerned there a great piece of kit,im supprised a lot more hams are unaware of them!!

any more thoughts on my ts-850 tunner/null issue yet dave? 73 m3vuv.

Remember, this is an open sourced product. No warranty and guarantee,
explicit or implicit. They do their best in China, but it is somewhat
expected that there may be user 'adjustments' required. Same for now
firmware downloads and installs. I have the original small display, the -F
and the -H4 versions. No problems with any of the three. So, loosen the
screws a bit - pretty simple and it doesn't even expose the electronics.

Can you imagine a torque wrench on every line on which these NANOVNA's are
assembled? not..........

Dave - W?LEV

<>
Virus-free.
www.avast.com
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On Fri, Mar 13, 2020 at 6:21 PM Roger Need via Groups.Io <sailtamarack=
[email protected]> wrote:

On Fri, Mar 13, 2020 at 06:17 AM, D R wrote:

Much ado about nothing: simply slacken the case screws a little to

relieve the

pressure on the display, and the problem will disappear.

Why should customers have to start fixing a new product that they
purchased? Any reputable suppler stands behind their product.

Hugen has not replied to my earlier question to him about what he intends
to do about the defective units that have been shipped. I have recommended
the Hugen product to multiple people on The Facebook NanoVNA User group but
sadly will stop doing that now....

Roger

--

*Dave - W?LEV*
*Just Let Darwin Work*
*Just Think*

On Fri, Mar 13, 2020 at 11:21 AM, Roger Need wrote:

Why should customers have to start fixing a new product that they purchased? Any reputable suppler stands behind their product.
===========================================================================
Roger,
You have to take into consideration that hugen is a talented radio amateur enthusiast whose aim was to put a sub $100 VNA into hands of other radio amateurs. He learns from users and his own experience, but in the end the NanoVNA is a open source hobbyist device and hugen is only financially capable of offering the level of customer support attendant to a sub $100 product produced by an enthusiast. Technically the H-4 works as designed. The case design was probably farmed out and the tolerances are tighter than they should be on a number of units.

I would advise any potential customer of a new product (NanoVNA-H4, SAA-2, etc.) who has an expectation of receiving a product free of any warts not to be among the first version purchasers. Experienced amateur radio enthusiast don't mind being on the cutting edge and helping to improve and advance a project. Hugen, from past experience, has continued to provide technical support of the NanoVNA and I don't doubt that subsequent deliveries of the NanoVNA-H4 will address the packaging problems. Fortunately, all my recommendations have been to other radio amateurs who don't mind and even relish popping open the case and making the minor changes required. Again, it all depends on ones level of expectation. The NanoVNA-H4 meets my expectation for a hobbyist level sub-$100 unit.

You can identify the first wave of soldiers into battle by the number of arrows sticking out of their backs.

- Herb

Ad9361 have 52mhz span

Il giorno martedì 10 marzo 2020, David J Taylor via Groups.Io <david-taylor=
[email protected]> ha scritto:

From: Leif M

Are any these able to show close sidebands. Like what happens with 1kHz

or 100Hz SSB modulation

================================

The minimum receiver bandwidth range is currently 2 MHz, but the Pluto

can be used very successfully as a narrow-band receiver so I think this is
just a programming limitation at the moment. You could buy the programmer
(that's NOT me) a beer or two via PayPal along with with request for
narrower receiver spans!

Cheers,
David
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

On Fri, Mar 13, 2020 at 06:17 AM, D R wrote:

Much ado about nothing: simply slacken the case screws a little to relieve the
pressure on the display, and the problem will disappear.

Why should customers have to start fixing a new product that they purchased? Any reputable suppler stands behind their product.

Hugen has not replied to my earlier question to him about what he intends to do about the defective units that have been shipped. I have recommended the Hugen product to multiple people on The Facebook NanoVNA User group but sadly will stop doing that now....

Roger

Alberto forgot to mention the SATSAGEN Groups.io forum for further discussion of his fine new software for the PlutoSDR.

regards, Roy

On Fri, Mar 13, 2020 at 06:34 AM, Tom Wall wrote:

I received my 4" 1500 MHz H4 version 0.4.5-7-g57d62f2 a few days ago.....
==========================================================
I recommend you upgrade to version 5.0, , as it fixes some significant issues with version 0.4.5.

- Herb

I received my 4" 1500 MHz H4 version 0.4.5-7-g57d62f2 a few days ago, ordered thru Alibaba on Feb 7. Battery was fully charged and all is working fine. Nicely boxed and it includes a short carry strap which has a triangular plastic piece that can be used for menu selecting. Glad to see the on-screen battery level meter - no need to install a diode. It's communicating with NanoSaver and calibration works. Have not made any measurements yet using NanoSaver but SWR, Smith chart and R+jX measurements and calibration direct on the H4 are working. So far I'm very pleased.

73 Tom K2TW

Appears to be just existing nanoVNA with the addition of a balanced to unbalanced balun on the bridge Rx sens output. . Not to be confused with the high freq AD8343 mixers, ADF4350 synth version previously described as V2 model.

Naming is going to create confusion with various models.

Everyone-
Update- Maggie K replied overnight. They are sending a new case. I do read this blog every day and somehow missed any report of these issues. ( pause for 1st sip of coffee) Versus my 1st smaller NanoVNA, I was surprized that this came in a case... It must be saddening to find an improvement such as a case as nice as it looks now is a problem.

I still am concerned regarding the Multi-switch as with regard to my "old" (3 month) NanoVNA the multi-switch on it is better but not perfect. Inspection of the new multi-switch indicates it's kind of soldered on - surface mount style and would be difficult to remove and replace. I am not warm and fuzzy in that regard.

I will post my adventures in the future and enjoy all the support I have received.