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Yeah. My new Yaesu has a ton of these U-FL connectors. I figure getting experience with these on this demo board is good practice before doing the same in more consequential circumstances.

Not just a quarter wave of coax in a mismatch. Any additional length of coax or transmission line with SWR (mismatch) will produce modification of impedance. Play with SimSmith using nothing other

There is not much mystery here. Transmission lines that are mismatched at all create impedance transformations at every odd multiple of a quarter wavelength. They become transparent, meaning the

I also found them difficult to connect. You must be "right-on" and give a straight push and you'll get a "snap" into place. They certainly are not connectors that should be connected and disconnected

Looks as NoMachine would allow access to RPI desktop , if I can get it installed.... wants to install package but does not tell you have to change folder.... However, I do not want to overstate my

Hello Andrea, The first U-FL connection is very stiff. So, you must center very good the connector. I have made some documentatio about that RD Demo Kit, see:

I've got the "RF Demo Kit for NanoVNA-F" by Sysjoint. Probably I never succeded so far in inserting any of the two U-FL connectors supplied. I also broke one socket on the board, fortunately it is the

Anne, you can have a remote desktop experience if you prefer using either RealVNC or NoMachine <https://www.realvnc.com/en/> <https://www.nomachine.com/> RealVNC works with Raspberry Pi if you enable

IMHO this is the most intelligent , no nonsense article about "how to Bluetooth" . Do not let "raspberry " distract you and SKIP all the GUI stuff , go down to command line.

After few detours I can SSH to my RPi. Now I have to re-learn now to navigate RPi using commands. Interesting how one forgets stuff after not using RPi for over a year. The Bluetooth "manager" on

There are videos on YT on how to measure characteristic impedances of stripline and coaxial cable.One I watched used a 50 ohm pulse generator on 75 ohm coax.I was wondering whether making the

Dave - Thanks for the additional analysis and plots which are all very interesting. I have noticed the sensitivity of everything involved in these antenna measurements. I had thought about the SO-239

Indeed Larry. Yes, hearty thanks is also due to those who set up and maintain this user group, and to all those, like yourself, who patiently contribute their time and expertise helping others with

Kent - Based on the additional information you've provided, it's possible that the SWR wobble in your 1st plot is due to the impedance bump in the UHF-SMA adapter with additional contribution from

The "Talking BT to a Pi" thing is out of my experience, so I can't help you there. Never heard of anyone doing "ssh to Pi over BT", and I'm not even sure that is a thing, so I'll stop. 8*) Finding the

It does identify my RPi with name, but I do not know the passcode . I am still learning about Bluetooth - especially how it is initialized on power-up. Now I am comparing behavior of HC-05 , got two

My new NanoVNA-H is working very well - it is an impressively capable, wonderful, little device! I send along very big Thank-You's to edy555, HuGen and those who provided earlier designs for the

I just could not get it to work right on manual calibration. The main issue is the sweep for 401 points is very particular and "fiddly", maybe more so on the wide sweeps. In any case, I just kept

If its silver and has a pin, it's your 50ohm load. <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Virus-free. www.avg.com

I still think complaining to the seller is the right way to go. Bob