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Good afternoon Gents. Ive just updated my firmware and manage to connect to the vna with putty however when I enter the command vbat_offset 150 I get the response vbat_offset? Any clues ?

It would be nice to have a menu option to calibrate the frequency. It is easy to adjust the Si5351A output frequency, all libraries for it include this function. 73, Mike AF7KR

I did this about 2 years ago similar to Roger Need's second link. On the output of the 1:49 balun I connected a 2400 ohm resistor and in series with this resistor on its ground end I connected an HP

Bill, That was a deleted word, not mispelled. Prolly due to my phat phingers. ?___ Sent from my two way wrist watch 73 de W3AB/GEO?

Hi Ed It is quite normal what you see. Please note that the number of point are only 100 so for the span used 50MHz you have a point for each 0.5MHz. Reduce the span to e.g. 140 to 150 MHz and see for

Hi Geo, In my two way wrist watch I have restricted the spell-checker to merely suggesting by underline any words it thinks are wrong and it is not allowed to "autocorrect". Sometimes it underlines

Should NOT flake off. My droid won that battle. Ugh! ?___ Sent from my two way wrist watch 73 de W3AB/GEO?

Jason, As an ex-employee of M/A-COM I can vouch for what you learned. We made special connectors for the test equipment companies, HP, Wiltron and such. The plating should flake off any OS connector.

Thank you for your message. I'm sure of my correct measurements: -1- The relatives frequencies errors are ~ equal on the CW output at 100MHz and direct TCXO (^-86 ppm) -2- The reference of my

Roger, The HW version is 3.4 and FW version: 0.4.5-1-gfbbceca. As i wrote before: " With a loop, i was able to measure the TCXO frequency and found 25.997748 MHz instead of 26MHz ! This error

Using the SMA-M/SMA-F adapters as connector savers like I think you show, Stan, is a very good idea. Even very high quality SMA connectors (>$50 each) degrade in match very quickly. Cheap ones with

Dr. Kirkby is right, as I can confirm from my own experience. Last year I wanted to do a RL measurement o find the losses of several lengths (up to 25 m) of leftover coaxial cables on all amateur

Sounds like a perfect excuse to buy a 3D printer! 73 Ed N5KZW

Thanks for all the suggestions!

No it look like hardware problem (or measure frequency problem) It possible fix by software need redefine To current XTAL frequency and rebuild Or replace XTAL

DiSlord suggested the error could be due to the firmware. What version are you running? Roger

Interesting way to measure balun loss with a single balun and a VNA. Thank you for posting this information. Roger

Hi, Is it posible for add the big CH0 screen info in version 0.7.1-20200321 by edy555 ? Tnx Andy - ON7BA

I just joined the nanoVNA group a couple of days ago and followed your thread on the balun measurement. If possible, why don’t you measure the scattering params, save the data, build a 3x3

Always perform a reset before setup and SOL. I have a piece of that DX400max 50ft long I do not see that oddity. That cable would have to be really poor to get that result. Several possible things,