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Does anyone know of a reasonably priced U.Fl calibration kit?

Thanks,
Mark

I purchased an RF Demo Kit (picture attached) that uses SMA to u.fl cables to attach VNAs to a small circuit board with 18 different circuits on it. When I calibrated my H4 using one cable and using the Short, Open and Load on the PCB, I got the expected results on the 33 ohm, 75 ohm, 3 dB attenuator and 10 dB attenuator across 10 MHz to 1.5 GHz. The attenuators were open on the output side so the return loss was 6 and 20 dB. I didn't try any thru tests.

About $25 on Amazon, less from eBay and China.

Hope this info is helpful.

Here is the picture. LOL

On Fri, Jun 19, 2020 at 11:45 PM, <david.hostetler@...> wrote:

I purchased an RF Demo Kit (picture attached) that uses SMA to u.fl cables to
attach VNAs to a small circuit board with 18 different circuits on it.

Hello David,

There was already a longer thtead started December last year:
/g/nanovna-users/topic/rf_demo_kit_testing_tutorial/65778338

73, Rudi DL5FA

Solution used in the shop was U.FL adaptors to SMA, then offset the
plane of meausrement buy the needed distance in picoseconds.

At below 30mhz its not an bit issue.

Allison
-----------------
No direct email, it goes to bit bucket due address harvesting in groups.IO

On Fri, Jun 19, 2020 at 02:29 PM, MarkZ wrote:

Does anyone know of a reasonably priced U.Fl calibration kit?

Thanks,
Mark

Hi , just to learning , why not use the short open load and thru already available on the board ?
73 de IZ1MDJ Maurizio

Hi Mark,

what about this one:
.
1000014.11.1dba3346IgYDPz&gps-id=pcDetailBottomMoreOtherSeller&scm=
1007.13338.128125.0&scm_id=1007.13338.128125.0&scm-url=1007.13338.128125.0&
pvid=974fdefd-61d5-43c3-8e97-161cf39f18b7
()
?




Milo?


---------- P?vodní e-mail ----------
Od: Maurizio IZ1MDJ <redifon500@...>
Komu: [email protected]
Datum: 20. 6. 2020 17:13:32
P?edmět: Re: [nanovna-users] U.Fl calibration kit
"On Fri, Jun 19, 2020 at 02:29 PM, MarkZ wrote:

Does anyone know of a reasonably priced U.Fl calibration kit?

Thanks,
Mark

Hi , just to learning , why not use the short open load and thru already
available on the board ?
73 de IZ1MDJ Maurizio



"

Thanks everyone for the info. I did order/receive one of those apparently ubiquitous boards with male u.fl connectors on it. Although the open/short/load seemed to work to calibrate the cable, the 900MHz antenna I'm testing uses a female U.Fl so I used the through to attach it and got strange results. Close but shifted down in frequency... as if there's extra length or an inductor in there somewhere.. I just don't trust the through to be a transmission line I guess. I'll see if I can de-embed it somehow.

Thanks.

Ok, I took your advice and after calibrating I tried a U.Fl to SMA on the through with a known SMA dipole antenna and the measurement was spot on... implying the 'too low' measurement is probably accurate and it's user error. Thanks everyone.

Mark