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All, Thanks for a lot of good thoughts and info. I have done all except I did not add any washers: there was no difference with the case off. After all the tries, it seems to be working even though

Hello, Perhaps someone on here could point me in the right direction. I have been given an old HP laptop running 8.1. It would be perfect to use outside with my nanoVNA. I have two Win 10 desktop

Hello Roger, My answers are in yout text I postet it already in /g/nanovna-users/message/13893 See: NooElelc_Balun_9-1_S21_Loss.png Yes, I have also a No-Name version of the Balun.

Rudi, Glad to hear you got the results you expected A couple of questions... 1. Your concern was that S11 was different when you hooked up the NanoVNA instead of the 50 ohm load. Could you please post

I find using a soft stylus made a capacitance touch display or the eraser end of a mechanical pencil works better than my finger. See attachment. Don't use the hard pointed end of the stylus which is

That is typical of screen cal. Use the jog sw to select the screen cal function, cal and test but remember to save the cal through the menu.

I tried to cal the touch screen. The menu bar is erratic. Touch it and it usually disappears. I wonder if this is a screen cal issue or if it is something else (softwre?). wrote: -- Paul W8SBH ??

Thanks for the compliment and the advice. Attenuators are a design feature, component values are on he schematic for 3, 6, and 15 dB. I discovered a similar comment while researching various ideas in

Hi Mark, at first I didn't understand your question, then it started to dawn, maybe you have the touch screen doing this thing too. The touch screen is tensioned or pressed somewhere, or the cover

My suggestion is to remove the screen-side cover plate and see if the error phenomenon still exists. The touch screen is particularly sensitive anywhere there is tension or pressure on the surface.

Hello David and Roger, This was the solution. Thank you very much for the hint. I have the schematic of the balun, but I did not consider the R1 jumper. II cut the R1 jumper on the lower side of the

David had a good suggestion on cutting the trace on that NanoVNA balun. I have done that on the ones I own. Here is a circuit drawing of the balun and a photo showing how to cut the track. Roger

The high impedance output of this balun is center tapped and the center tap is grounded back to the input SMA (unless you cut the small trace on the back of the PCB). When you connect one side of the

Calibrate at the end of the 50cm of cable! USe a small SMT resistor 49.9 ohm 1% works well enough or you can get exact 50 ohm in 1% SMT. Short and open are easy. Did this kind of stuff for measuring

Have similar issues with my new H4. The touch screen interface is inconsistent. Sometimes pressing a menu action works with the correct option highlighted. Other times not either with the wrong button

Have similar issues with my new H4. The touch screen interface is inconsistent. Sometimes pressing a menu action works with the correct option highlighted. Other times not. I have calibrated the LCD.

If the touch screen still fails to work after recalibration, the touch screen may be damaged and you can contact your dealer for replacement.

Possible Need run touch screen calibrate Push leveler button Push right while not select CONFIG menu Push leveler button Push left or right to select TOUCH CAL Push leveler button On screen use stylus

Rudi, Here is a suggestion - Try the test again by putting the 50 ohm load at the end of the cable instead of connecting it to CH1. Now you just have the coaxial cable connected with the same load on

I have the -H model, HW ver. 3.4, SN 20011259 build Dec 26, 2019. I have had this for about 2 weeks and it had been working nicely. Purchased from GigaParts. 1. The unit turns on and the