NanoVNA shielded eBay sellers?  - Page 1
Forum section: electronics / general

author: jimdeane
author_rank: Regular Contributor
timestamp: September 29, 2019, 03:59:54 am
content: I have a credit burning a hole in my pocket on eBay, and it's coincident with me really wanting a NanoVNC. In my research it seems some of the clones out there are built better than others.I haven't been able to get answers from sellers on Ebay, so I thought I'd ask if any of you have bought one recently (in the US) and can confirm that you have the shielded version?https://groups.io/g/nanovna-users/attachment/1106/0/NanoVNA_006.JPGIf so, I'm interested in hearing who to buy from.

author: MarkF
author_rank: Super Contributor
timestamp: September 29, 2019, 04:07:28 am
content: You may want to see this first (starting @ 2:05):

author: jimdeane
author_rank: Regular Contributor
timestamp: September 29, 2019, 04:38:28 am
content: I have seen reports of the quality variability. The person responsible for the current design, who apparently doesn't make them any more, suggested that finding ones with shielding was a clue to higher quality.I realize I may get a dud, but for $35-40... I'm willing to give it a try.

author: jimdeane
author_rank: Regular Contributor
timestamp: September 30, 2019, 10:55:06 pm
content: Has nobody here purchased one from ebay?

author: xrunner
author_rank: Super Contributor
timestamp: September 30, 2019, 11:41:09 pm
content: Quote from: jimdeane on September 30, 2019, 10:55:06 pmI have .I works fine, very impressed. I've done my own testing and it's quite a neat little device and accurate.There's some debate over whether the mixers need to have shields over them. Mine didn't, although I made some for it. However, it seems to be a non-issue. People with the knowledge and equipment to test this have done so and found it's nothing to worry about if it comes without shields.You can check for yourself here -https://groups.io/g/nanovna-users/topicsShowing return loss for my fan dipole for the 5 HF ham bands it is made for -

author: jimdeane
author_rank: Regular Contributor
timestamp: October 01, 2019, 09:56:16 pm
content: That is good to hear, thank you. I see yours is the white face / lizard variety. Maybe I'll aim for one of those.

author: VK3DRB
author_rank: Super Contributor
timestamp: October 02, 2019, 08:51:55 am
content: I bought one recently from eBay. Incredibly cheap and OK up to 1GHz (OK for ham radio; no good for BLE and WiFi).Fairly well built, but I suggest if you have a 3D printer you print one of these enclosures to protect everything including the switches at the side...https://www.thingiverse.com/search?q=nanovna&dwh=695d946209dc8d5Beware there are two main types of VNAs out these; hence there are two types of cases. One wont fit over the Micro USB but the other will. Here is the photo of my NanoVNA with its enclosure... printed in black PLA+ (to impress the chicks). The cover at the end contains the stylus.

author: xrunner
author_rank: Super Contributor
timestamp: October 02, 2019, 11:32:43 am
content: Quote from: VK3DRB on October 02, 2019, 08:51:55 amMine ... printed in two-tone PLA, one for me and another for a friend ... you know - to impress the chicks.

author: jimdeane
author_rank: Regular Contributor
timestamp: October 03, 2019, 05:06:39 pm
content: Very nice! Love the enclosures. Another reason to finally dig out and fix my printer.