On Tue, 16 Sep 2014, Jeefaw K. Effkay wrote:

On 16/09/2014 16:53, Jerry Stuckle wrote:

Ah, heck - don't make it so easy. A REAL HAM would mine and smelt his
own ore (using a garden trowel and blowtorch). He would create his own
insulating material from raw materials (bakelite would probably be
easiest), and finally shape and assemble the final product.

A real ham wouldn't make coaxial connectors.

A real ham would be using a link-coupled output from his PA, to a balanced
transmission line.

And you can certainly make ladder line yourself, once you figure out
something for the spacers. I doubt anyone's ever made coax at home.

Michael

PS - don't feed the troll :-)

"Michael Black" wrote in message
news:alpine.LNX.2.02.1409161411150.29263@darkstar. example.org...
I doubt anyone's ever made coax at home.

It would be an interesting exercise to conceive of the mechanism
for weaving the braid, such that it was tight onto the dielectric

On 16/09/2014 19:43, gareth wrote:
"Michael Black" wrote in message
news:alpine.LNX.2.02.1409161411150.29263@darkstar. example.org...
I doubt anyone's ever made coax at home.

It would be an interesting exercise to conceive of the mechanism
for weaving the braid, such that it was tight onto the dielectric

Would you need to weave braid?
Could it not be made by wrapping the dielectric in foil?
Spiral winding foil or otherwise wrapping in foil would seem to be a lot
easier than braiding on the fly.

Andy

AndyW wrote:
On 16/09/2014 19:43, gareth wrote:
"Michael Black" wrote in message
news:alpine.LNX.2.02.1409161411150.29263@darkstar. example.org...
I doubt anyone's ever made coax at home.

It would be an interesting exercise to conceive of the mechanism
for weaving the braid, such that it was tight onto the dielectric

Would you need to weave braid?
Could it not be made by wrapping the dielectric in foil?
Spiral winding foil or otherwise wrapping in foil would seem to be a lot
easier than braiding on the fly.

Andy

I salvaged a load of old Rediffusion coax that was hooked to my house and
that had sheet copper wrapped around the dielectric.

--
Stephen Thomas Cole // Sent from my iPhone

In rec.radio.amateur.homebrew Michael Black wrote:
On Tue, 16 Sep 2014, Jeefaw K. Effkay wrote:

On 16/09/2014 16:53, Jerry Stuckle wrote:

Ah, heck - don't make it so easy. A REAL HAM would mine and smelt his
own ore (using a garden trowel and blowtorch). He would create his own
insulating material from raw materials (bakelite would probably be
easiest), and finally shape and assemble the final product.

A real ham wouldn't make coaxial connectors.

A real ham would be using a link-coupled output from his PA, to a balanced
transmission line.

And you can certainly make ladder line yourself, once you figure out
something for the spacers. I doubt anyone's ever made coax at home.

Michael

I've made short lengths of rigid, air dielectric coax for UHF projects
from hobby store brass tubing on several occasions.



--
Jim Pennino

On Tue, 16 Sep 2014, wrote:

In rec.radio.amateur.homebrew Michael Black wrote:
On Tue, 16 Sep 2014, Jeefaw K. Effkay wrote:

On 16/09/2014 16:53, Jerry Stuckle wrote:

Ah, heck - don't make it so easy. A REAL HAM would mine and smelt his
own ore (using a garden trowel and blowtorch). He would create his own
insulating material from raw materials (bakelite would probably be
easiest), and finally shape and assemble the final product.

A real ham wouldn't make coaxial connectors.

A real ham would be using a link-coupled output from his PA, to a balanced
transmission line.

And you can certainly make ladder line yourself, once you figure out
something for the spacers. I doubt anyone's ever made coax at home.

Michael

I've made short lengths of rigid, air dielectric coax for UHF projects
from hobby store brass tubing on several occasions.

That's true. For inside a chassis. And I suppose making rigid is much
easier than making flexible coax, since you can get that brass tubing.

Michael

Michael Black wrote in
news:alpine.LNX.2.02.1409161603130.29800@darkstar. example.org:

I've made short lengths of rigid, air dielectric coax for UHF projects
from hobby store brass tubing on several occasions.

That's true. For inside a chassis. And I suppose making rigid is much
easier than making flexible coax, since you can get that brass tubing.


I've never used it for that (not done much RF work at all), but I like it,
it's very precise (and in the UK and on eBay precision imperial sized tools
to go with it are often a lot cheaper than metric, and mixing units can offer
suprising answers to tough problems, like tight fits of 4mm into a 5/32 hole
or a bit of that tubing of same size ID (3.96875mm). (Which incidentally
might help answer the original question, as one way to make accurate DIY 4mm
sockets.) Brass brazing rods can also be used, they're supplied very clean,
straight, and with even thicknesses, and I suspect hard drawn quality too.

If I had to make a aired cored coax I might hard-draw a bit of stripped mains
cable by hanging it off the top of a door and putting my weight on it to pull
the other end. I have done that a few times and got very good straight copper
bars that way in thicknesses up to about 2mm diameter.

Michael Black wrote:
On Tue, 16 Sep 2014, wrote:

In rec.radio.amateur.homebrew Michael Black wrote:
On Tue, 16 Sep 2014, Jeefaw K. Effkay wrote:

On 16/09/2014 16:53, Jerry Stuckle wrote:

Ah, heck - don't make it so easy. A REAL HAM would mine and smelt his
own ore (using a garden trowel and blowtorch). He would create his own
insulating material from raw materials (bakelite would probably be
easiest), and finally shape and assemble the final product.

A real ham wouldn't make coaxial connectors.

A real ham would be using a link-coupled output from his PA, to a balanced
transmission line.

And you can certainly make ladder line yourself, once you figure out
something for the spacers. I doubt anyone's ever made coax at home.

Michael

I've made short lengths of rigid, air dielectric coax for UHF projects
from hobby store brass tubing on several occasions.

That's true. For inside a chassis. And I suppose making rigid is much
easier than making flexible coax, since you can get that brass tubing.

Michael

Actually for feeds on UHF antennas; judicious selection of tubing size
allows female N connectors to be soldered on the end.


--
Jim Pennino

wrote in message
...

I've made short lengths of rigid, air dielectric coax for UHF projects
from hobby store brass tubing on several occasions.

.... and for the main line in an SWR meter