开云体育

Fair enough. I'm a bit sceptical of the T-check method. R&S don't sell the device to do this any any more, but they used to. They only sell verification kits based on airlines and attenuators. Ken

I guess a revisit to using an impedance matching network to solve this issue is required. Once a upon a time we spent significant effort building RX bridges, noise bridges, etc... and spent much time

========================================================== The newest hardware release is the NanoVNA-h, see attachments. It is priced slightly higher than the old release but is a better overall

Mechanical construction of standard have a relationship to the plane of calibration. Basically you can measure that as distance or time they use time as its easy to measure. What does it mean is that

Are any of them newer hardware release levels? Any to avoid?

Here's what I use. Drill 2 holes and cut a 2" slot and presto, a case with a lid for $1.60 plus 4 more cases for other projects.

2 - @Gary O'Neil, N3GO 15 December 2019 - /g/nanovna-users/message/8238 Hello again, We are terribly sorry but we forgot to emphasize enough that a model such this one is totally

@Gary O'Neil, N3GO 15 December 2019 - /g/nanovna-users/message/8238 Dear Gary, Not at all. Would you read, please, our related message: #85: On the Formation of a Virtual Port 15

GIN& PEZ; Do your assertions in: #84: On the Virtuality of the "Measurement Port" signal that you are abandoning your pursuit of a two port model of a “LeastVNA”, or is it simply a statement that

#85: On the Formation of a Virtual Port Hello, Allow us, please, to somehow explain the formation of a Virtual Port facupov, in our sow. Well, since we can always introduce the "reflection" relation:

A few years ago I made an open and a short female SMA standard for calibrating my HP 8753C VNA (for the load I used a very nice 85052 female 3.5mm load). I never used the open and short above about 30

As measured impedance get significantly higher or lower then 50 ohms the variance in bridge resistors create greater errors.

I bought a case from the eBay source Terry referenced. I did have fo file one edge to get the proper fit, but otherwise, no problems. -ed, k9ew

I had 3d printed some cases and some people were happy, some were not. Seems these things are all not the same and sometimes you need to shave some of the holes to make it fit

I typed nanovna case into google and hit the first ebay listing that came up https://www.ebay.com/itm/NanoVNA-Case-/174039026524 Note that there is no gap between nano and vna in the search term. --

Hi Dave, Your email is working now? I read in forum his email was worng. I tried send emal two times but notl answer. Delay between two mail several weeks. Many expert help me a lot. Including you, on

Try Etsy ... I bought a 3D printed case from a guy there and it works fine for my unit. 73, Dave?? AB7E

Thanks for the reply. I tried eBay and eBay Canada and all that comes up is the whole units not just a case for an existing unit. I searched nano VNA case and VNA case.

Search Ebay, there's plenty of them. Do note, however, they might not fit your particular model, as there are slight differences between the original "VNAs' and the clones regarding physical size and

see msg #322. Search under vna cases or 3D cases.