Looking for cable, 2 coax with overall 3rd shield

A

amdx

Guest
I'm looking to buy cable that has two wires, each in a shield, then this
whole thing is in another shield. Flexibility is good.
Thanks, Mikek
 
On 3/15/2014 9:45 PM, RobertMacy wrote:
On Sat, 15 Mar 2014 16:17:01 -0700, amdx <nojunk@knology.net> wrote:

I'm looking to buy cable that has two wires, each in a shield, then
this whole thing is in another shield. Flexibility is good.
Thanks, Mikek


is that called twinax?

Belden makes it, I think
Click to expand...

From what I see, twinax is 2 wires in one shield. I need both wires
in their own shield and then a third shield around both of those.
Thanks, Mikek
 
On Sat, 15 Mar 2014 16:17:01 -0700, amdx <nojunk@knology.net> wrote:

I'm looking to buy cable that has two wires, each in a shield, then this
whole thing is in another shield. Flexibility is good.
Thanks, Mikek
Click to expand...

is that called twinax?

Belden makes it, I think
 
amdx wrote:
On 3/15/2014 9:45 PM, RobertMacy wrote:
On Sat, 15 Mar 2014 16:17:01 -0700, amdx <nojunk@knology.net> wrote:

I'm looking to buy cable that has two wires, each in a shield, then
this whole thing is in another shield. Flexibility is good.
Thanks, Mikek


is that called twinax?

Belden makes it, I think

From what I see, twinax is 2 wires in one shield. I need both wires
in their own shield and then a third shield around both of those.
Click to expand...

VGA monitor cable?

--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
 
On 3/16/2014 3:02 AM, Michael A. Terrell wrote:
amdx wrote:

On 3/15/2014 9:45 PM, RobertMacy wrote:
On Sat, 15 Mar 2014 16:17:01 -0700, amdx <nojunk@knology.net> wrote:

I'm looking to buy cable that has two wires, each in a shield, then
this whole thing is in another shield. Flexibility is good.
Thanks, Mikek


is that called twinax?

Belden makes it, I think

From what I see, twinax is 2 wires in one shield. I need both wires
in their own shield and then a third shield around both of those.


VGA monitor cable?
Click to expand...
I'm not aware of what is inside,
does this super VGA type look right?
http://www.ebay.com/itm/6FT-10FT-30FT-50FT-100FT-HD15-PIN-SVGA-SUPER-VGA-Monitor-Cable-M-Male-Male-LOT-/350979305532

Thanks, Mikek
 
On 03/16/2014 06:46 AM, amdx wrote:
On 3/16/2014 3:02 AM, Michael A. Terrell wrote:

amdx wrote:

On 3/15/2014 9:45 PM, RobertMacy wrote:
On Sat, 15 Mar 2014 16:17:01 -0700, amdx <nojunk@knology.net> wrote:

I'm looking to buy cable that has two wires, each in a shield, then
this whole thing is in another shield. Flexibility is good.
Thanks, Mikek


is that called twinax?

Belden makes it, I think

From what I see, twinax is 2 wires in one shield. I need both wires
in their own shield and then a third shield around both of those.


VGA monitor cable?

I'm not aware of what is inside,
does this super VGA type look right?
http://www.ebay.com/itm/6FT-10FT-30FT-50FT-100FT-HD15-PIN-SVGA-SUPER-VGA-Monitor-Cable-M-Male-Male-LOT-/350979305532


Thanks, Mikek
Click to expand...

http://www.mouser.com/ProductDetail/Belden-Wire-Cable/1325A-009500/?qs=diL56h19LyhlP5VuOmySxg%3d%3d
 
On Sat, 15 Mar 2014 21:05:53 -0700, amdx <nojunk@knology.net> wrote:

On 3/15/2014 9:45 PM, RobertMacy wrote:
On Sat, 15 Mar 2014 16:17:01 -0700, amdx <nojunk@knology.net> wrote:

I'm looking to buy cable that has two wires, each in a shield, then
this whole thing is in another shield. Flexibility is good.
Thanks, Mikek


is that called twinax?

Belden makes it, I think

From what I see, twinax is 2 wires in one shield. I need both wires
in their own shield and then a third shield around both of those.
Thanks, Mikek
Click to expand...

TWIN CORE COAX CABLE ?
 
On 3/16/2014 9:14 AM, dave wrote:
On 03/16/2014 06:46 AM, amdx wrote:
On 3/16/2014 3:02 AM, Michael A. Terrell wrote:

amdx wrote:

On 3/15/2014 9:45 PM, RobertMacy wrote:
On Sat, 15 Mar 2014 16:17:01 -0700, amdx <nojunk@knology.net> wrote:

I'm looking to buy cable that has two wires, each in a shield, then
this whole thing is in another shield. Flexibility is good.
Thanks, Mikek


is that called twinax?

Belden makes it, I think

From what I see, twinax is 2 wires in one shield. I need both wires
in their own shield and then a third shield around both of those.


VGA monitor cable?

I'm not aware of what is inside,
does this super VGA type look right?
http://www.ebay.com/itm/6FT-10FT-30FT-50FT-100FT-HD15-PIN-SVGA-SUPER-VGA-Monitor-Cable-M-Male-Male-LOT-/350979305532



Thanks, Mikek


http://www.mouser.com/ProductDetail/Belden-Wire-Cable/1325A-009500/?qs=diL56h19LyhlP5VuOmySxg%3d%3d
Click to expand...
AS Phil would say, Are we supposed to guess what you need, give the
details. expletives deleted

OK here is what I want to duplicate.
Two separate coax with a third braid over both of those.
Thanks, Mikek
PS. Not my excellent ascii artwork. Hope the font works!
- -
- | | | | -
| | | | Signal(+) | | | |
<------------------------------------------------------------------>
| | | | | | | |
| | | Inner Shield | | |
+-------------------------------------------------#----+
| | | | |
Probe/ | | | | |
Sensor | | | | | Meter
| | Inner Shield | | |
+-------------------------------------------------#----#
| | | | | | |
| | | | Signal(-) | | | | |
<------------------------------------------------------------------>
| | | | | | | | |
- | | | | - |
| | | | |
| Outer braid & GND | |
<------------#-------------------------------------#----------#---->
 
The Lady from Philadelphia sez...

If the required length of cable is not great, why not envelope two coax cables
in a length of shielding?
 
On 3/16/2014 11:23 AM, Maynard A. Philbrook Jr. wrote:
In article <op.xcsnavyo2cx0wh@ajm>, robert.a.macy@gmail.com says...

On Sat, 15 Mar 2014 16:17:01 -0700, amdx <nojunk@knology.net> wrote:

I'm looking to buy cable that has two wires, each in a shield, then this
whole thing is in another shield. Flexibility is good.
Thanks, Mikek


is that called twinax?

Belden makes it, I think


My employer would be willing to manufacture any composite
type of cable with an overall braid if he'd like :)

dual RG-174 with overall braid jacket comes to mind.

Some times called shotgun cable.

Jamie
Click to expand...
This is low budget.
Thanks, Mikek
 
On 3/16/2014 10:31 AM, William Sommerwerck wrote:
The Lady from Philadelphia sez...

If the required length of cable is not great, why not envelope two coax
cables in a length of shielding?
Click to expand...

5 ft is the length, for know I hope to find the proper cable I need.
Thanks, Mikek
 
In article <op.xcsnavyo2cx0wh@ajm>, robert.a.macy@gmail.com says...
On Sat, 15 Mar 2014 16:17:01 -0700, amdx <nojunk@knology.net> wrote:

I'm looking to buy cable that has two wires, each in a shield, then this
whole thing is in another shield. Flexibility is good.
Thanks, Mikek


is that called twinax?

Belden makes it, I think
Click to expand...

My employer would be willing to manufacture any composite
type of cable with an overall braid if he'd like :)

dual RG-174 with overall braid jacket comes to mind.

Some times called shotgun cable.

Jamie
 
amdx wrote:
On 3/16/2014 3:02 AM, Michael A. Terrell wrote:


VGA monitor cable?

I'm not aware of what is inside,
does this super VGA type look right?
http://www.ebay.com/itm/6FT-10FT-30FT-50FT-100FT-HD15-PIN-SVGA-SUPER-VGA-Monitor-Cable-M-Male-Male-LOT-/350979305532
Click to expand...

They have three miniature 75 ohm coax cables and an outer shield, along
with several other single conductors. This is for your homemade Boonton
RF probe, so I've seen the cable they use. Don't you have a spare
monitor cable laying around, or a recycler that will let you swipe a
cable off a bad monitor?


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
 
On 3/16/2014 12:50 PM, Michael A. Terrell wrote:
amdx wrote:

On 3/16/2014 3:02 AM, Michael A. Terrell wrote:


VGA monitor cable?

I'm not aware of what is inside,
does this super VGA type look right?
http://www.ebay.com/itm/6FT-10FT-30FT-50FT-100FT-HD15-PIN-SVGA-SUPER-VGA-Monitor-Cable-M-Male-Male-LOT-/350979305532


They have three miniature 75 ohm coax cables and an outer shield, along
with several other single conductors. This is for your homemade Boonton
RF probe, so I've seen the cable they use. Don't you have a spare
monitor cable laying around, or a recycler that will let you swipe a
cable off a bad monitor?
Click to expand...
I'll take a look through my junque, I may have one I can tear into.
Yes, I'm trying to put a cable together, that will work on the Boonton.
Two coax, small and flexible is the ideal.
Thanks, Mikek
 
On Sat, 15 Mar 2014, amdx wrote:

On 3/15/2014 9:45 PM, RobertMacy wrote:
On Sat, 15 Mar 2014 16:17:01 -0700, amdx <nojunk@knology.net> wrote:

I'm looking to buy cable that has two wires, each in a shield, then
this whole thing is in another shield. Flexibility is good.
Thanks, Mikek


is that called twinax?

Belden makes it, I think

From what I see, twinax is 2 wires in one shield. I need both wires in
their own shield and then a third shield around both of those.
Thanks, Mikek

So it's really two pieces of thin coax in a single covering.
Click to expand...

I don't know. I was checking garage sales one day in the summer, and
passed yard that had a nifty monitor cable lying there all by itself,
just discarded. It had BNC connectors on both ends, at least three. So I
assume it had something like RG174 between the connectors, and then some
wrapper around the individual pieces, but I could be wrong. A nice blue.
I haven't dug any deeper, but was thinking if my assumption is right, the
I could strip out the connectors and small cables, and have a more useful
to me set of cables.

Michael
 
Michael Black wrote:
So it's really two pieces of thin coax in a single covering.

I don't know. I was checking garage sales one day in the summer, and
passed yard that had a nifty monitor cable lying there all by itself,
just discarded. It had BNC connectors on both ends, at least three. So I
assume it had something like RG174 between the connectors, and then some
wrapper around the individual pieces, but I could be wrong. A nice blue.
I haven't dug any deeper, but was thinking if my assumption is right, the
I could strip out the connectors and small cables, and have a more useful
to me set of cables.
Click to expand...

Video uses 75 ohm cable. RG/174 is 50 ohm. It can cause a lot of
errors at higher frequencies.

--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
 
On 3/16/2014 12:50 PM, Michael A. Terrell wrote:
amdx wrote:

On 3/16/2014 3:02 AM, Michael A. Terrell wrote:


VGA monitor cable?

I'm not aware of what is inside,
does this super VGA type look right?
http://www.ebay.com/itm/6FT-10FT-30FT-50FT-100FT-HD15-PIN-SVGA-SUPER-VGA-Monitor-Cable-M-Male-Male-LOT-/350979305532


They have three miniature 75 ohm coax cables and an outer shield, along
with several other single conductors. This is for your homemade Boonton
RF probe, so I've seen the cable they use. Don't you have a spare
monitor cable laying around, or a recycler that will let you swipe a
cable off a bad monitor?
Click to expand...
I opened up the cable I have and it is aluminum shield, won't work
for my purpose. Plus two many wires.
I'm looking at this audio cable with XLR connectors.
http://www.amazon.com/XLR-Male-Female-Microphone-Cable/dp/B00CTHNM52/ref=cm_cr_pr_product_top
I suspect this is a twisted pair inside a shield, pins 1, 2, and 3 and
then a shield around everything that connects to the housing of the
connector.

It says, "These cables... because of their combination of heavy duty
construction as well as their inner and outer protective RF shielding of
heavy duty copper conductors.

So it has two shields, but is each conductor shielded?

The use is the Boonton RF meter the cable carries DC voltage at low
voltages, as low as 1mV.
I'm still trying to find the right cable. I'd like to find something
commercial and cut a 25ft cable into 5 pieces and put ends on them.
Mikek
 
amdx wrote:
On 3/16/2014 12:50 PM, Michael A. Terrell wrote:

amdx wrote:

On 3/16/2014 3:02 AM, Michael A. Terrell wrote:


VGA monitor cable?

I'm not aware of what is inside,
does this super VGA type look right?
http://www.ebay.com/itm/6FT-10FT-30FT-50FT-100FT-HD15-PIN-SVGA-SUPER-VGA-Monitor-Cable-M-Male-Male-LOT-/350979305532


They have three miniature 75 ohm coax cables and an outer shield, along
with several other single conductors. This is for your homemade Boonton
RF probe, so I've seen the cable they use. Don't you have a spare
monitor cable laying around, or a recycler that will let you swipe a
cable off a bad monitor?


I opened up the cable I have and it is aluminum shield, won't work
for my purpose.
Click to expand...

An aluminum foil shield can be quieter than braided, tinned copper
when the cable is flexed. The drain wire allows you to connect it to the
connector, and probe body as needed. Not all VGA cable is foil
shielded, but the more flexible is likely to be made that way since you
need multiple layers of braid to achieve the same level of shielding.
Some cable has enough free space that you could pull out the unwanted
conductors. S-video cable might work, if you could find it with an outer
shield, but VGA cable is the closest, off the shelf wire available.


Plus too many wires.
Click to expand...

All you have to do is tie any unused wires to ground at the connector
end.


Belden 1277P or 1277R is just three 75 ohm miniature coax cables with a
bonded foil shield, but it's about $1.06 or $1.58 per foot when you buy
1000 feet at a time.


I'm looking at this audio cable with XLR connectors.
http://www.amazon.com/XLR-Male-Female-Microphone-Cable/dp/B00CTHNM52/ref=cm_cr_pr_product_top
I suspect this is a twisted pair inside a shield, pins 1, 2, and 3 and
then a shield around everything that connects to the housing of the
connector.

It says, "These cables... because of their combination of heavy duty
construction as well as their inner and outer protective RF shielding of
heavy duty copper conductors.

So it has two shields, but is each conductor shielded?
Click to expand...

Why would each conductor be shielded, for low impedance, balanced
audio?


The use is the Boonton RF meter the cable carries DC voltage at low
voltages, as low as 1mV.
I'm still trying to find the right cable. I'd like to find something
commercial and cut a 25ft cable into 5 pieces and put ends on them.
Mikek
Click to expand...

http://www.uniqueelectronics.com/ could make what you want, but you
better have your chair bolted to the floor and a seatbelt on when you
ask for a quote. I haven't dealt with them for years, but I did show
them how to prove that some customer supplied microwave cable was
garbage. The customer claimed it was their test equipment, but the semi
rigid cables I had proved it was in spec. One of their engineers was in
my computer club at the time. :)


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
 
On 03/17/2014 06:26 PM, amdx wrote:
On 3/16/2014 12:50 PM, Michael A. Terrell wrote:

amdx wrote:

On 3/16/2014 3:02 AM, Michael A. Terrell wrote:


VGA monitor cable?

I'm not aware of what is inside,
does this super VGA type look right?
http://www.ebay.com/itm/6FT-10FT-30FT-50FT-100FT-HD15-PIN-SVGA-SUPER-VGA-Monitor-Cable-M-Male-Male-LOT-/350979305532



They have three miniature 75 ohm coax cables and an outer shield, along
with several other single conductors. This is for your homemade Boonton
RF probe, so I've seen the cable they use. Don't you have a spare
monitor cable laying around, or a recycler that will let you swipe a
cable off a bad monitor?


I opened up the cable I have and it is aluminum shield, won't work
for my purpose. Plus two many wires.
I'm looking at this audio cable with XLR connectors.
http://www.amazon.com/XLR-Male-Female-Microphone-Cable/dp/B00CTHNM52/ref=cm_cr_pr_product_top

I suspect this is a twisted pair inside a shield, pins 1, 2, and 3 and
then a shield around everything that connects to the housing of the
connector.

It says, "These cables... because of their combination of heavy duty
construction as well as their inner and outer protective RF shielding of
heavy duty copper conductors.

So it has two shields, but is each conductor shielded?

The use is the Boonton RF meter the cable carries DC voltage at low
voltages, as low as 1mV.
I'm still trying to find the right cable. I'd like to find something
commercial and cut a 25ft cable into 5 pieces and put ends on them.
Mikek
Click to expand...

Call Pacific Radio in Burbank. They are a Belden dealer and a pro cables
manufacturer.
 
On 3/18/2014 3:07 AM, Michael A. Terrell wrote:
amdx wrote:

On 3/16/2014 12:50 PM, Michael A. Terrell wrote:

amdx wrote:

On 3/16/2014 3:02 AM, Michael A. Terrell wrote:


VGA monitor cable?

I'm not aware of what is inside,
does this super VGA type look right?
http://www.ebay.com/itm/6FT-10FT-30FT-50FT-100FT-HD15-PIN-SVGA-SUPER-VGA-Monitor-Cable-M-Male-Male-LOT-/350979305532


They have three miniature 75 ohm coax cables and an outer shield, along
with several other single conductors. This is for your homemade Boonton
RF probe, so I've seen the cable they use. Don't you have a spare
monitor cable laying around, or a recycler that will let you swipe a
cable off a bad monitor?


I opened up the cable I have and it is aluminum shield, won't work
for my purpose.


An aluminum foil shield can be quieter than braided, tinned copper
when the cable is flexed. The drain wire allows you to connect it to the
connector, and probe body as needed. Not all VGA cable is foil
shielded, but the more flexible is likely to be made that way since you
need multiple layers of braid to achieve the same level of shielding.
Some cable has enough free space that you could pull out the unwanted
conductors. S-video cable might work, if you could find it with an outer
shield, but VGA cable is the closest, off the shelf wire available.


Plus too many wires.


All you have to do is tie any unused wires to ground at the connector
end.


Belden 1277P or 1277R is just three 75 ohm miniature coax cables with a
bonded foil shield, but it's about $1.06 or $1.58 per foot when you buy
1000 feet at a time.


I'm looking at this audio cable with XLR connectors.
http://www.amazon.com/XLR-Male-Female-Microphone-Cable/dp/B00CTHNM52/ref=cm_cr_pr_product_top
I suspect this is a twisted pair inside a shield, pins 1, 2, and 3 and
then a shield around everything that connects to the housing of the
connector.

It says, "These cables... because of their combination of heavy duty
construction as well as their inner and outer protective RF shielding of
heavy duty copper conductors.

So it has two shields, but is each conductor shielded?


Why would each conductor be shielded, for low impedance, balanced
audio?
Click to expand...

Just hoping to find what I want in a common cable :-(
and I don't know audio cable.


The use is the Boonton RF meter the cable carries DC voltage at low
voltages, as low as 1mV.
I'm still trying to find the right cable. I'd like to find something
commercial and cut a 25ft cable into 5 pieces and put ends on them.
Mikek


http://www.uniqueelectronics.com/ could make what you want, but you
better have your chair bolted to the floor and a seatbelt on when you
ask for a quote. I haven't dealt with them for years, but I did show
them how to prove that some customer supplied microwave cable was
garbage. The customer claimed it was their test equipment, but the semi
rigid cables I had proved it was in spec. One of their engineers was in
my computer club at the time. :)
Click to expand...
I want cheap.
Mikek
 
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