how to press a BNC antenna connector on a Linksys Wi-fi

Dell Dell latitude d400, d500, d600, d80...
June 8, 2012 at 19:11:19
Specs: Win XP Pro/SP3 & Linux Mint Katya, Pentium M/2GB
The right antenna BNC connector came off of my Linksys WRT54G wifi router. Does anyone know how to press in back on so it will stay and not come off again?

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June 9, 2012 at 10:28:49
I doubt it was pressed on. You press on bearings not connectors.

Just go buy a new wrt.

Hang up and live.

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June 9, 2012 at 16:00:23
I was wrong on what type of a antenna connector this is. It is a TNC. Linksys made the male side of the connector on the router as a two piece part that presses together. There is a small bulge on the back side of the TNC that fits into a small hole on the other part that looks like a small metal box with a hole in it and with a small metal spire coming out of the hole (the other side of the antenna). My guess is that Linksys uses a press die machine of some sort to put these two parts together before it is soldered on the circuit board. I took the router apart and was able the get these two parts mostly pressed together using a small vise grip tool but can't get it in all of the way. This particular router is the 2.2 version. I'll see about posting some pics of this so you can see what this looks like.

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June 9, 2012 at 19:02:52
Here are the pics. Some of the pics are a bit out of focus but will do for this purpose.
The bulge looks like a sort of green band and is not very easy to see in the pic.
The small hole the small bulge goes into looks like a small black ring in the pic.
This is how far I was able to get it in with the vise grips.
The left antenna Male TNC for comparison.

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Related Solutions

June 10, 2012 at 02:25:14
Hi Arcosanti,

Google can be your friend in such matters. Googling 'tnc connector' produces many hits and pictures. e.g.:-

I do not know this router, but suspect a special crimping tool (or press) was used, for assembling the socket and co-ax cable, when the circuit board was made.

The parts you show, relate to the co-ax cable screen. On your second picture (one marked small hole) should there be a metal pin on the inner cable? I cannot see if it is present.

Have you asked Linksys if they have offer an exchange /repair service?
This does not seem to me mentioned on their website support pages though.

Here in the UK, these routers are around £23 new. Vastly less if used, and possibly later/better models of such. (e.g. Ebay item 120925581037)

At these prices they are really throwaway items. Jefro is correct to advise purchasing a replacement as you will probably spend more in time and/or money attempting to repair without guarantee of success.

If you replace with similar unit, suggest keeping old one for spares.

Please advise back on progress.

As a matter of interest, where are you based. I am in Hammersmith, West London.

Good Luck - Keep us posted.

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June 10, 2012 at 20:00:42
I don't have any discretionary money these days so getting another router isn't something I am really wanting to do. Although I have seen these things at the various local Goodwill Thrift stores for a few dollars. If it is one of the early versions, I might be persuaded to get it, otherwise I am not that interested in it. I prefer to use dd-wrt over the original firmware as it is so much better. The later versions are a pain to put dd-wrt on it. Also I am not wanting to throw away a good wi-fi router if it can be fixed as I do not like seeing this stuff go to the land fill. Dealing with Linksys does not seem like much of an option to me assuming they would repair it , they'd only do so for a hefty fee.

Any I was able to press it in enough so it will stay in. I used a heavier pair of vice grips from my tool box that I keep in my car. I then put it back together and put the antenna's back on. For safety reasons, I made the right antenna the receiver and the left antenna the transmitter. The connector has no retainer pin to hold it together. Just the bulge that fits into the small hole. It's a pretty tight fit and it generally shouldn't come apart. Here's a pic of what it looks like before I put the router together:

It's not flush, but it is better than it was.

I am in Mesa, AZ a suburb of Phoenix.

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June 11, 2012 at 09:52:56
My firewall doesn't let me look at those images so I can't say.

If the connector is broken on the inside you might be able to get by with soldering some wire to some connector or crimping it with a tool. The tools are kind of expensive so you might see if there is a screw on or solder on type.

It may work OK with a single antenna. I assume the vswr would be way out but it should work for a home.

Hang up and live.

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June 12, 2012 at 04:34:39
Hi Arcosanti,

well done for getting it working. However if a contact is not 100%, please bear in mind it can slow transmissions down by causing repeats.

The pin I referred to is not a holding pin, but connects to the centre/signal cable of the co-ax.

If you follow my link above, in the first diagram it is (wrongly) labelled bushing, whereas it should be male centre contact. The pin is connected either by crimping or soldering depending on the TNC assembly.

The router on Ebay UK sold for £10 including postage.

Good Luck - Keep us posted.

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