Good morning, I purchased a Nanovna2 some time ago, now an angular SMA connector has broken. Is it possible to know if there are spare parts and how to find them so that I can replace it. Thank you.

You are asking where to buy a common RF connector?

On Wed, 20 Mar 2024 at 16:30, <iw4ehj@alice.it> wrote:

>
> Good morning, I purchased a Nanovna2 some time ago, now an angular SMA connector has broken. Is it possible to know if there are spare parts and how to find them so that I can replace it. Thank you.
>

Try adafruit.com


On Wed, Mar 20, 2024 at 11:30 AM <iw4ehj@alice.it> wrote:

> Good morning, I purchased a Nanovna2 some time ago, now an angular SMA
> connector has broken. Is it possible to know if there are spare parts and
> how to find them so that I can replace it. Thank you.
>
>
>

Hi!

I'm in the U.S. so I can't see the Aliexpress for Italy, but this link ( https://www.aliexpress.us/item/3256804843806184.html?spm=a2g0n.productlist.0.0.19bc392aBUURe9&browser_id=31e6c9efce584f069669e5a562814341&aff_platform=msite&m_page_id=iaihdqtmicauoqyj18e5f6c8b1714849bc61ba0d86&gclid=&pdp_npi=4%40dis%21USD%211.42%210.99%21%21%211.42%210.99%21%402101e5f117109979328045498e5e7c%2112000031390698270%21sea%21US%210%21AB&algo_pvid=973e9afb-2c78-41a6-b389-5ff440d37eff ) has a promising connector.

I see two at it.farnell.com, one by Johnson-Cinch Connectivity (Part Number 142-0701-501) and another by Amphenol RF (Part Number 132203).

It will take some care and patience to remove the broken one from the PCB without damaging the PCB. It looks like it will require flux, and some solder wick (braid), etc.

Hope this is helpful! Please let me know if there are any questions or concerns!

Good luck!!

- Steve

No worries they are easy to change. Best to cut off the old pins then remove the bits with. Soldering iron and resolder a new one.

One tip is always cover your sma sockets with the red rubber caps when not in use. If you are clumsy like me and drop your vna chances are the sma sockets, even if slightly are no good anymore. The treads are very fragile and you will find you have a hard time screwing a cable on again.

Another thing to do is get good quality M-F SMA “jack savers” and mount them on the SMA connectors. This way, if the threads get buggered up, you just change the jack saver, and you are back in business. It doesn’t help with snapping them off, but I think that is not as much a big deal than cross threaded or other wide “screwed up” threads

Frank

KA2FWC

heat the ground side and centre and peel it off the board (pull sideways)

easy with hot air.. not so easy but doable with a bigger soldering iron

dg9bfc sigi



Am 21.03.2024 07:06 schrieb stevenmclark1@gmail.com:

> Hi!
>
> I'm in the U.S. so I can't see the Aliexpress for Italy, but [this
link](https://www.aliexpress.us/item/3256804843806184.html?spm=a2g0n.productlist.0.0.19bc392aBUURe9&browser_id=31e6c9efce584f069669e5a562814341&aff_platform=msite&m_page_id=iaihdqtmicauoqyj18e5f6c8b1714849bc61ba0d86&gclid=&pdp_npi=4%40dis%21USD%211.42%210.99%21%21%211.42%210.99%21%402101e5f117109979328045498e5e7c%2112000031390698270%21sea%21US%210%21AB&algo_pvid=973e9afb-2c78-41a6-b389-5ff440d37eff)
has a promising connector.
>
> I see two at it.farnell.com, one by Johnson-Cinch Connectivity (Part Number
142-0701-501) and another by Amphenol RF (Part Number 132203).
>
> It will take some care and patience to remove the broken one from the PCB
without damaging the PCB. It looks like it will require flux, and some solder
wick (braid), etc.
>
> Hope this is helpful! Please let me know if there are any questions or
concerns!
>
> Good luck!!
>
> \- Steve



_._,_._,_

* * *

The M-F SMA "jack-savers" look like the image below-

These are particularly useful because SMA connectors have a limited number of mating cycles ( ~600) and if these are used on both ports they can just be replaced when the contact becomes suspect. This means the jack on the PCB does *not* have to be replaced because it has only had, for example, the one mating cycle when the "jack saver" was put in place.

The image is of a part from Amphenol SV Microwave Part Number SF2997-6003 listing on DigiKey... Less expensive parts are available from Aliexpress, etc.

I just wanted to be sure it was clear what the discussion was about... Sorry if this seems pedantic.

Again, good luck with all your projects!

Best,
Steve