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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 one of the "open circuit". It seems the connector just does not fit the socket, no matter how much special care I use in aligning the parts. What could be the resaon for this nightmare?

Thanks in advance!


Andrea

On Sat, Jul 24, 2021 at 11:35 AM, Andrea IK0RNT wrote:

What could be the resaon for this nightmare?

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 hope it helps.

73, Rudi DL5FA

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 repeatedly! I tried several sections of the card. Some were easier than others (nearly impossible). I chose to return the item as being almost useless!

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.

Thanks, Rudi.

I already came across your guide, though I underestimated the importance of using a screwdriver to press the connector.

Anyway I must have broken something with my subsequent attempts. I could properly insert just one connector. No way so far to achieve the same result on the other socket with the other plug.
Besides, the "Short" socket is gone, by now. So I've gotta give up, possibly ordering some U-FL SMD socket to make the replacement... and perhaps some cable with the U-FL plug too? I mean, might have damaged the U-FL male as well?

A.

On 7/24/21 2:00 PM, Andrea IK0RNT wrote:

Thanks, Rudi.

I already came across your guide, though I underestimated the importance of using a screwdriver to press the connector.

Anyway I must have broken something with my subsequent attempts. I could properly insert just one connector. No way so far to achieve the same result on the other socket with the other plug.
Besides, the "Short" socket is gone, by now. So I've gotta give up, possibly ordering some U-FL SMD socket to make the replacement... and perhaps some cable with the U-FL plug too? I mean, might have damaged the U-FL male as well?

A.

There is, also, a little tool designed to demate these without ripping the connector off the board.? Probably one for mating, as well. I've no idea where to get them, but I've held the demate tool, so someone got it somewhere.

On 7/24/21 2:00 PM, Andrea IK0RNT wrote:

Thanks, Rudi.

I already came across your guide, though I underestimated the importance of using a screwdriver to press the connector.

Anyway I must have broken something with my subsequent attempts. I could properly insert just one connector. No way so far to achieve the same result on the other socket with the other plug.
Besides, the "Short" socket is gone, by now. So I've gotta give up, possibly ordering some U-FL SMD socket to make the replacement... and perhaps some cable with the U-FL plug too? I mean, might have damaged the U-FL male as well?

A.

There is, also, a little tool designed to demate these without ripping the connector off the board.? Probably one for mating, as well. I've no idea where to get them, but I've held the demate tool, so someone got it somewhere.

You can get the tool from Data Alliance for 17 dollars. Digi Key also one but the Data Alliance tool looks better.
I may order one. With arthritis it is even more difficult to instruct them.
--
TTFN
Steve K4AH

Link at data-alliance (no, I neither work for them mor have any financial interest in them, only interest in not ruining any more u.fl assemblies)



cheers,
Waldemar
KI7VYJ

Digikey has the extraction tool: their part number is H9159-ND