old coax plugs

On Mon, 16 Jul 2012 10:01:07 +0100, Ian Jackson
wrote:

In message , Paul D Smith
writes

"Bill Wright" wrote in message
...
https://dl.dropbox.com/u/11023364/ol...%20etc%202.jpg

Bill

What on earth was the thing that looks like a bayonet for?

I know what it is. My phone line is attached to the brickwork of the
house using them. The bent bit is lead, which you bend to hold the
cable. You don't see many around these days.

They're known as "Lead Lugs".
--
Regards, J B Good

In article , Bill Wright
scribeth thus
Graham. wrote:

The fact is Charles, UHF signals do pass very well through such a
connection. Try removing the aerial plug from a TV and just hold it 1
or 2 mm from the socket, you may be surprised.

There would be more capacitive coupling with the oxide dialectic you
describe than the 1mm air gap in my argument.

Yes an unknown "variable" in the circuit..


The fact is, plugs where the coax inner is just loose inside the pin can
lose 3dB easily.

Bill

Indeed you can and more. Does anyone not solder or crimp N or BNC or TNC
connectors used at UHF.

No, and why shouldn't you do the same for Belling Lee coaxial?..


--
Tony Sayer

PeterC wrote:
On Mon, 16 Jul 2012 04:12:08 +0100, Bill Wright wrote:

charles wrote:

The fact is Charles, UHF signals do pass very well through such a
connection.
I can assure you that 20+ years experience of domestic aerial installations
shows me that unsoldered joints give rise to terrible problems.
Apart from a bit of loss there can be mismatch problems.

possibly if there is a lot of signal, you will still get a picture. If the
singal is marginal, the foregt t.
See! Charles has gone all pixelated now! Obviously a loose plug!

Bill

Damn you! Museli on me monitor!

To be honest I wanted to expand the remark and say something about a
screw being loose as well, but Charles is such a gentleman I thought it
a shame to provoke him to the point of using intemperate language.

Bill

Paul D Smith wrote:

"Bill Wright" wrote in message
...
https://dl.dropbox.com/u/11023364/ol...%20etc%202.jpg

Bill

What on earth was the thing that looks like a bayonet for?

Paul DS.
The lead-headed wall nail?

Bill

Ian Jackson wrote:
In message , Paul D Smith
writes

"Bill Wright" wrote in message
...
https://dl.dropbox.com/u/11023364/ol...%20etc%202.jpg

Bill

What on earth was the thing that looks like a bayonet for?

I know what it is. My phone line is attached to the brickwork of the
house using them. The bent bit is lead, which you bend to hold the
cable. You don't see many around these days.
Yes, they were the only way. They were very hard to hammer in, the lead
head used to fall off, and they were expensive.

Bill

Stephen Wolstenholme wrote:
On Mon, 16 Jul 2012 08:41:33 +0100, "Paul D Smith"
wrote:

"Bill Wright" wrote in message
...
https://dl.dropbox.com/u/11023364/ol...%20etc%202.jpg

Bill
What on earth was the thing that looks like a bayonet for?

Paul DS.

External cable support. Not specifically for coax.

Steve

They still sell them in garden shops.

http://www.amazon.co.uk/38mm-Lead-He.../dp/B0051SZVGE

http://www.capitalgardens.co.uk/gard...s-p-17805.html

Bill

What on earth was the thing that looks like a bayonet for?

I know what it is. My phone line is attached to the brickwork of the
house using them. The bent bit is lead, which you bend to hold the
cable. You don't see many around these days.

They're known as "Lead Lugs".
--
Regards, J B Good

I think the ones used to secure the phone wires
In my old house had the manufacturers name
"Snow" embossed on the lead tail.

Thanks, Bill and others. Yes it's a big "Whoops!" from me, cos I forgot
about DC. (I also recall trying to solder some of the polythene (?) mounted
centre pins in the early days and found it was a wonderful way to remove the
pin from the mount.) For many years since (and please understand that I've
only played with these things on my own equipment) I've found that a gentle
curve or bow placed in the centre conductor, so that it maintains contact
with the inside of the pin by sprung tension, has been adequate - but
perhaps it wasn't?

Chas


"Bill Wright" wrote in message
...
Chas Gill wrote:

But why would you want to solder them?

1. Because of DC pass requirements.
2. Many a time I meter the loss on a flylead and find it to be erratic.
The variation is only a few dB. Crimping or soldering fixes it.

Bill

Chas Gill wrote:
Thanks, Bill and others. Yes it's a big "Whoops!" from me, cos I forgot
about DC. (I also recall trying to solder some of the polythene (?)
mounted centre pins in the early days and found it was a wonderful way
to remove the pin from the mount.) For many years since (and please
understand that I've only played with these things on my own equipment)
I've found that a gentle curve or bow placed in the centre conductor, so
that it maintains contact with the inside of the pin by sprung tension,
has been adequate - but perhaps it wasn't?

That's a common trick, and I guess most of the time it works well enough
or people wouldn't do it.

This business of the polythene melting though — well we solder these
plugs in large quantities because we make special flyleads up for use in
the jails. We make clip-on heat sinks by squashing the jaws of small
croc clips in a vice, so they have minimum width. Two of them at the
base of the pin solves the problem. The lad I have who does this job
whips though a pile of leads in no time, never a problem.

Bill

On Tue, 17 Jul 2012 20:12:51 +0100, Bill Wright wrote:

This business of the polythene melting though — well we solder these
plugs in large quantities because we make special flyleads up for use in
the jails.

Are they such that they cannot be used to strangle anybody?