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I recently saw a YouTube video on these devices and I am very interested in getting one. Checking Amazon for instance, there are dozens of sellers of these and prices range from $35 to $85. I have no idea which one to get and which sellers are better. Any info would be greatly appreciated. My YouTube ID is hamrad88.

Thanks,

Tom Stiles

I bought one from here... It seems to work OK and and has the shielding fitted.

I too am a prospective buyer and I joined this group hoping to elicit more information. However the volume of argument over esoteric minutiae is putting me off. I agree with the call for simplified documentation to enable users to be able to use the device "out of the box" and for simple tasks. I think many purchasers/users of this item will be hobbyists attracted by the price which is a tiny fraction of that of other commercially available products. Professionals will already be using professional equipment and trying to make this device perform the same seems beyond the scope of it's design parameters.

Tom G6PZZ

From what I can tell here, most all the NanoVNAs you order work. The first thing to watch out for when ordering lowest cost is "no battery included". Most people will need this and unless you can buy a battery for less than the delta cost and are comfortable tack soldering the battery into your nanoVNA, order one with a battery.

Another place where low cost vendors scrimp is in the calibration kit. Cheaper vendors may omit all or parts of the calibration kit. You must have some kind of calibration kit to use any VNA. The SMA calibration kit that ships standard with the nano will serve although experts on this site say it is not the best.

Low cost vendors may not package the unit appropriately for shipping. People have reported some orders were unusable.

There is debate on this site about the value of the rf shields. To my knowledge, there is no proof that the shields help performance.

The units that I have with shields also have a Qr-code on the inside cover pointing to www.nanovna.com. I think that website has fairly good documentation that is well organized. Although, at a glance, the documentatin there may assume that you have upgraded the firmware inside the nanoVNA. So, read carefully.

If you are comfortable doing these firmware upgrades, some of the devices will work to some extent up to 1.5GHz. and new functions like TDR are supported.

Anyone have a recommendation for a good battery to add to a unit missing one?

if you search on the term battery size you will get a lot of information. But here is one post:


|kf7dur
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|Sep 5 #1870 ?
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|Karl,
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|I used a 602040 450mAH (5x20x31.5mm) battery in my Banggood NanoVNA. I don't think anything bigger will fit.
|$8.99 from Amazon.
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|Ken
|KF7DUR

I also added a nice board photo uploaded by Mike. Shows the battery very nicely.

Advice to newbies: Search .....Look at the Wiki..... Read the Tips and Users Guide. #RTFM Look at and use #Hashtags

The NanoVNA is not Plug and Play. Using a VNA is not Plug and Play if you want reliable results. It is not a grid dip meter (look that up) and it isn't an MFJ 259B. It is a work in progress, IT IS A KIT! Firmware is being revised every few weeks right now, and the NanoSaver software is maturing very nicely, but it is being worked on by people who are not getting paid. Don't worry about firmware upgrades until you have some time with the Nano.

Excellent information. Thanks for taking the time to provide this information.

Tom Stiles

You could do what I did when I got my Nano back in June - use a very thin cellphone battery.It's perfectly safe and there are a couple of photos in the photo section of the forum:
/g/nanovna-users/photo/0/40?p=Created,,,20,1,40,0

That looks like the Battery from an old Motorola RAZR Cell-Phone.
They are still available on e-Pay for short money.

73, Dick, W1KSZ
________________________________
From: [email protected] <[email protected]> on behalf of Larry Rothman <nlroth@...>
Sent: Monday, October 21, 2019 4:59 AM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] Newbie

You could do what I did when I got my Nano back in June - use a very thin cellphone battery.It's perfectly safe and there are a couple of photos in the photo section of the forum:
/g/nanovna-users/photo/0/40?p=Created,,,20,1,40,0

On Monday, October 21, 2019, 7:47:07 a.m. GMT-4, hamrad45 <hamrad@...> wrote:

Excellent information. Thanks for taking the time to provide this information.

Tom Stiles




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Welcome to Groups.io!


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Yup - about 600mAH?
I raised the rear cover using an extra 2mm using a small hex nut under each (longer) screw and it works great.
I'll have to see how long it runs on one charge.
The only issue I have now is I cannot perform a screen capture as my device has a clone ILI9343 display - INANBO-T28SPIP18-V16?
It appears this display's RAM buffer cannot be read.