LibreVNA 100Khz to 6Ghz VNA may be worth watching.

[VK3ZYZ]

This is a work in progress that I'll keep an eye on.

GitHub - jankae/LibreVNA: 100kHz to 6GHz 2 port USB based VNA

100kHz to 6GHz 2 port USB based VNA. Contribute to jankae/LibreVNA development by creating an account on GitHub.

github.com

I wonder how long before it appears on Ebay or AliExpress?

 

[BillC]

Looks interesting , see the three quad diode mixers in the lower foreground of version # 2 board . Good jiggers diode mixers! .

 

[VK3YNV]

According to the LibreVNA group, the official hardware is the one on the Aliexpress Zeenko Store.

https://www.aliexpress.com/item/1005002428364525.html?spm=a2g0o.cart.0.0.49703c00PhLoZF&mp=1

It's early days yet, but should be an interesting one to watch.

 

[BillC]

Those things might not be mixers , might be coupling transformers.

 

[VK3YNV]

I think you are spot on there Bill, I haven't checked the schematic, but they look like tiny transformers.

 

[BillC]

Hi Ray . Its a bit hard to work out what is really going on with the front ends/ports , the block diagram and the description show 50 ohm resistive RLB's and suggests the advantage of wide band frequency response presumably fairly flat over the desired range , they might have trimmed the response with track layout and design too . Thanks for the discussion . The device certainly looks like something to watch out for as time goes on. Cheers .