RG59 and BNC crimping help

[vavet]

I should clarify...I *think* this is RG59 cable...but my google-fu tells me the copper core should be about 0.8mm and mine is 0.4mm.

I have a Q-see DVR with the Siamese coax/DC power cables. I'd like to shorten the cables to get rid of the excess wire that runs into the cabinet.
I ordered a cheap crimper, stripper, and BNC cable ends from amazon. I figured I'm only doing 3 of these so I can cope with cheap tools. Hopefully that's not my downfall.

So here's where I am: I've stripped the cable. I have the copper braid peeled back. I have the dielectric, and I have a portion of the bare copper conductor in the middle.

The BNC conductor appears to have two pieces of metal folded together that prevents insertion of the conductor. The conductor bends if I try to force it. I sacrificed a connector and forced a small screwdriver down between the two folds...now it's wide open but won't clamp the conductor.

I've watched several YouTube videos on this process. Several of them are using connectors with separate pins that get crimped onto the conductor. The connectors I have already have the center pin inside the connector. The other videos I've seen just show the person inserting the stripped/prepared cable into the connector and crimping it. They don't seem to have the issue I'm having.

At first, I thought the connectors I got were defective. I've ordered new connectors and they are the same way. What am I missing? How do I insert the center core into the connector?

 

[rlitman]

Those work like the blades in an outlet, and are tightly sprung together to make good contact with your wire. You could insert a steel sewing needle towards the side to open the gap enough to get the soft copper started.

 

[nh_yota]

Are you sure you ordered the right connectors? Those look like F to BNC connectors not cable ends.

 

[dogdog]

Are you sure you ordered the right connectors? Those look like F to BNC connectors not cable ends.

^^^ that...

make sure it is something like these.

when you order, make sure it is for the RGx what ever cable you are ordering... I think they have different bnc for different cables.. just like those other F, SMA ETC...

https://www.digikey.com/en/products/detail/amphenol-rf-division/112120/2627836

 

[wyliesdiesels]

you bought the wrong connectors

you need either crimp to bnc connectors or compression to BNC connectors.

i dont like the crimp style so i buy the compression style but you would need the compression tool to terminate them

here is what i use

https://www.amazon.com/gp/product/B001UFJK1O/?tag=atomicindus08-20

 

[theoldwizard1]

Snap-N-Seal are THE BEST F connectors ! Of course you need a special tool to install them.

 

[wyliesdiesels]

Snap-N-Seal are THE BEST F connectors ! Of course you need a special tool to install them.

snap and seal is a thomas and betts product.

the name of the type of connector is compression

 

[iron block]

How about putting F connectors on your cables, then screwing those into the F-to-BNC adapters that you have on hand?

Cascaded connectors aren't ideal, but should work fine here. Worth a try?

 

[rlitman]

How about putting F connectors on your cables, then screwing those into the F-to-BNC adapters that you have on hand?

Cascaded connectors aren't ideal, but should work fine here. Worth a try?

That's what I usually do. It's a fraction of the price of crimp on BNC.

As for cascading RF connectors, ALL BNC are cascaded to an extent, as the center wire has to make contact with the center pin, and that will cause the same reflections whether it's an F to BNC adapter, or an actual BNC end. It's one of BNC's shortcomings. And the shield won't be hurt by this setup either.

 

[wyliesdiesels]

How about putting F connectors on your cables, then screwing those into the F-to-BNC adapters that you have on hand?

Cascaded connectors aren't ideal, but should work fine here. Worth a try?

dont think he realized that he has f to bnc coupler adapters. he thinks they are f connectors...

 

[theoldwizard1]

snap and seal is a thomas and betts product.

the name of the type of connector is compression

Snap-N-Seal has been sold once or twice since T&B owned it. I think the current owner is Belden.

 

[vavet]

Those work like the blades in an outlet, and are tightly sprung together to make good contact with your wire. You could insert a steel sewing needle towards the side to open the gap enough to get the soft copper started.

OP here...this is the winner. I used a T-pin to open the contacts just enough to let the copper core slip in.
The crimps are not pretty.
I think the Siamese coax cable is not the same OD as normal RG59.
The connectors I have are not F connectors. They are legit RG59 BNC connectors.

Thanks for all the tips. If I ever had to do it again, I think it would be worthwhile to get the 3 piece connectors including the crimp on center pin. I think that would work better.

 

[wyliesdiesels]

OP here...this is the winner. I used a T-pin to open the contacts just enough to let the copper core slip in.
The crimps are not pretty.
I think the Siamese coax cable is not the same OD as normal RG59.
The connectors I have are not F connectors. They are legit RG59 BNC connectors.

Thanks for all the tips. If I ever had to do it again, I think it would be worthwhile to get the 3 piece connectors including the crimp on center pin. I think that would work better.

they dont look like the right connectors to me

can you take a pic with the connector laying sideways on the table.