Jump to content
  • 0

How to pull broken pin in SMA connector?


markskjerve

Question

I've got a HT with a female SMA antenna connector and the center pin on the antenna broke in the connector somehow. The broken pin is buried deep enough that you can't really see it much less pull it out with tweezer's. I tried a kind of strong refrigerator magnet but that didn't work. Anybody know of a way to pull the pin without having to disassemble the radio?   

Link to comment
Share on other sites

7 answers to this question

Recommended Posts

  • 1

The question that needs to be answered is not "if" but "when" the radio case is going to be removed to retrieve the broken pin. Your concern should be if the pin works its way down inside the radio and short circuits something and causes a castistrophic and costly repair. Bite the antenna and retrieve the pin now.

Link to comment
Share on other sites

  • 1
1 hour ago, nokones said:

The question that needs to be answered is not "if" but "when" the radio case is going to be removed to retrieve the broken pin. Your concern should be if the pin works its way down inside the radio and short circuits something and causes a castistrophic and costly repair. Bite the antenna and retrieve the pin now.

Looking at a drawing of one type of female SMA, which has a solder cup on the other end of the center pin socket, it appears that the pin cannot go into the radio. If it could then opening the radio and pushing the pin through would be the way to go. 
IMG_3633.png.34ff36a225694ec3d2c2c3ffdcadba94.png

Link to comment
Share on other sites

  • 0

A data sheet for a high quality SMA male connector shows that the center pin may be beryllium copper, which is not attracted to a magnet.

https://www.fairviewmicrowave.com/images/productPDF/SC7033.pdf

Magnetic properties of beryllium copper:

https://materion.com/-/media/files/alloy/tech-briefs/at0006-0311---tech-briefs---magnetic-properties-of-copper-beryllium.pdf

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Guidelines.