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Nano VNA




 
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W4AMV
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« Reply #25 on: August 03, 2019, 09:26:53 PM »

Hi,

I just spoke to Frank who makes the cases. He will be posting to the forum via the SALES area for "nanoVNA" cases. You can contact him direct. Any questions he will be able to address directly.

Thanks, Alan
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WA2SQQ
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« Reply #26 on: August 05, 2019, 09:37:58 AM »

I've been reading through the groups.io comments and I see many mentioning that "no battery" was included. What kind of battery does it use? Mine will be here in a few weeks and I'd like  to get ready.
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W4AMV
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« Reply #27 on: August 05, 2019, 09:46:28 AM »

Good day,

The units I have are Lithium. I believe 375 mA/hr. Some units come with or are spec with a 400 mA/hr. The operation current is spec at 120 mA. Mine typically runs for 2-to- 3 hrs before required charge off the USB port on the lap top.

Folks use flat profile cell phone batteries. I would check the users forum thread about any issues with the internal charging circuits and what batteries to avoid.

Alan
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WA2SQQ
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« Reply #28 on: August 05, 2019, 09:53:21 AM »

All noted, with my thanks. I'd be interested in receiving any info / links on what people are using. I read the ad of the one I purchased and no where did it say, no battery was included.
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WA2SQQ
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« Reply #29 on: August 05, 2019, 10:17:44 AM »

Just reread the ad from the guy I ordered it from. Can someone explain this about the port wiring?

This is a DIY product that provides perfect vector network measurement capabilities in the size of a credit card. It includes a 2.8-inch touch screen and 500mAh battery, which can be used offline for 2 hours. For longer measurement, please connect external power supply or contact me to make a larger battery version. The TX/RX method can measure the complete S11 and S21 parameters. If you need to obtain S12 and S22, you need to manually replace the transceiver port wiring.
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KD6VXI
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« Reply #30 on: August 05, 2019, 12:17:42 PM »

S11 and S21 are from Port A to Port B.

S12 and S22 are from Port B to Port A.

My vnwa has an output that will trigger an external relay box to physically reverse the device u Der test.

With the nano vna, you'd have to manually swap the leads.... 

It's for measuring the device under test in reverse.

Although I've built a relay box for my vnwa, I've never actually used it.

--Shane
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WA2SQQ
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« Reply #31 on: August 05, 2019, 01:17:24 PM »

Thanks for this simple and clear explanation. So it looks like many are ordering these. I'm wondering if anyone has created a list, or web page that would explain all that needs to be done once you receive it? I have my antenna analyzer, but its limited to what it can do on the bench. I'm looking at this as a low cost learning experience - that will require some reading and experimentation.

I'm also interested in one of the cases.
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W4AMV
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« Reply #32 on: August 05, 2019, 01:52:42 PM »

What Shane stated is correct.

Two items for you to consult. On the first page of this thread, Mike posted the English version of the manual. It is terse. However, the info is there.

Second, also on the first page of this thread, I posted the MENU flow pdf. Take a look at that. That pdf MENU flow provides you with a visual on the instrument softkey sequence and the MAP to get this tool functioning.

Antenna work, aka, antenna analyzer and for simple measurements of R,L and C components, you can configure the device as a so called ONE PORT or ONE CHANNEL tool. For filter response and all other TWO PORT devices, there is a slight step up in what you need to do.

If you want to gain a better understanding of the VNA, google Keysight Introduction into the VNA. Its a good basic read. Here is the link below:

http://literature.cdn.keysight.com/litweb/pdf/5965-7917E.pdf

I should add calibration is a key piece in setting these tools up to run. However, it is a straight forward process.

Regards, Alan
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W4AMV
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« Reply #33 on: August 06, 2019, 11:34:00 PM »

If you desire information on the case design email Frank below:

ka2fwc@bellsouth.net [undefined:ka2fwc@bellsouth.net]
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WA2SQQ
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« Reply #34 on: August 16, 2019, 06:56:03 AM »

So I received mine yesterday. Iím impressed! First question, the screen appears to have a protective film on it. It looks like Iíll have to partially disassemble it to remove it.

I assume it should be removed?
Also, many videos have appeared in YouTube. Just search Nanovna

One observation, when I turn it off, the blue light remains on. Need to hit the rocker switch to make it go out.
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W1ITT
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« Reply #35 on: August 16, 2019, 09:18:44 AM »

I left my protective screen thing on , and it works just fine.  That green tab of screen material that sticks up is confusing as to its function, so I left it there.
As to the led that shines after shutdown, I find that by waiting a minute or so, it goes off by itself.  There isn't any "official" word on these rigs so we can depend on user groups and just trying stuff to see what works.  As long as you don't connect one of the SMAs to something with power on it, they seem to be forgiving.  It's nice to see these VNAs getting into more stations and getting more hams on the learning curve.
And again, for those who are contemplating buying a NanoVNA, the black ones seem to have the better functionality than the white ones with the gecko.  And Ebay or Aliexpress seems to make no difference, so go with what works for you.
Norm W1ITT
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