开云体育

Does anyone have a source for a set of calibration standards on PL-259 / 239 connectors? Yes, I know I could “make them”, but I’d rather buy them! ;)

--
Regards,
Chris

Calibration using SO-239 or PL-259 connectors is marginally useful at lower frequencies like the HF band because it is not an impedance controlled connector. The link below is the only commercial set I know of and they are UHF to SMA connectors with SMA loads attached which you can buy from Amazon much cheaper.



A review of these Array Solutions cal loads was done by someone in this group.

/g/nanovna-users/topic/71375643#11047

You can make easily make better ones and there are several YouTube and web links that tell you how.

Disclaimer: There are a couple of topics on this group that have discussed the disadvantages of using UHF (SO-239 and PL-259) connectors with the NanoVNA.

/g/nanovna-users/topic/71097146#10935
/g/nanovna-users/topic/71523607#11501

Roger

I got a set from Amazon for like $15 US. 2 so239 and 2 pl259

MFJ is selling a set and that is good enough for HF and the tolerances are good enough for every day "hobby" work. I always lol at people promoting commercial calibration standards costing hundreds if not thousands of dollars for what I consider a piece of equipment just a notch over a toy.A useful toy but by no means high enough grade to spend a fortune on the accessories.

Here is some info on the MFJ cal loads suggested by W7ZQ. Says rated to 1 GHz. - really?

Roger