connecting coaxial inside a wall plate for TV

The clamp goes onto the braid, ie the outer sheath has to be removed. Make sure the braid doesn't short onto the central solid wire.

No!

Strip back the outer sheath then fold the braid back over the sheath - you may have to partially or totally unravel it - and place both the braid AND sheath together under the clamp.

If the cable also has a copper foil screen, rather than a bonded aluminium one, tear it off so that it can't get in the wrong place.

The clamp performs two function, one physical and one electrical.

yes, otherwise it'll amplify your bile. Or something like that.

Cheers, T i m

Drivel. The cable is not subject to mechanical stress as it's behind the wall plate.

Is it ... IYHO of course!

So, between the faceplate being off and back in place, there is no chance any strain could be put on the inner conductor (if the clamp wasn't providing any mechanical support)?

Or if someone pulls the cable from the other end ... ?

What you meant was in 'harry's world' (... Imagine how sad / sick a place that would be if it was a Theme Park ...) you couldn't imagine any circumstances where making sure the mechanical clamp was as good as possible would be a 'good idea'?

Cheers, T i m

It's probably bent at an angle that is trying to pull it out of the clamp.

Of course it does, they don't just put it there to annoy people trying not to short it out you know. I think if you have to ask such a question you might not be the best person to wire up aerials. Brian

Its the wrong wall plate then. The minimum radius on coax is quite large. If its TV it matters less than for sat.

On 11/04/2019 08:50, Brian Gaff wrote: ...you

True

Dribble yourself Harry! It's much easier to put the wallplate into position if the cables are secured to it firmly. Also, if the outer sheath doesn't reach the braid clamp the dielectric can deform as the plate is fitted, causing an impedance bump.

Bill

There's no way a wallplate can align the cable entry so the cable doesn't have to bend.

CT100 semi-airspaced is about 70mm. Foam is a bit less.

How come, since cable losses are greater at higher frequencies, meaning that signals reflected due to poor VSWR are absorbed more rapidly?

Bill

The braid goes under the clamp.

So why don't they have a cable grip on the incomer(s) of a 13a socket?

The consequences of an aerial cable coming loose are trivial anyway.

the frequency from the LNB is higher than Digital TV IIRC.

Use a deep box with F type both sides if its through the wall and line up the hole in the wall?

Because the conductors are typically 2.5sqmm and between them generally hold the cable group in place. Not the same with a very fine central conductor on a co-ax cable (especially one that may have been nicked with the cutter when being stripped).

Not really the point though eh?

Cheers, T i m

Because the individual conductors are separated and the whole conductor is gripped by the screw. With coax only the thin inner is gripped.

Not if it's in a system that's under warranty and is 200 miles away.

Bill

Exactly.

Bill