RadioBanter - View Single Post

December 4th 05, 11:32 PM posted to rec.radio.shortwave

On 3 Dec 2005 17:09:19 -0800, wrote:

wrote:
How about using twisted wire inside the coax cables?
cuhulin
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Twinax is a balanced pair in side a coaxial shield.
I haven't ever seen a true twisted pair inside a braid.

Twinax is used for balanced video and some instrumentation connections.

Standard on IBM AS/400s.

Another varient of coax is triax. Think of normal coax with another
braid
over the coaxial pvc jacket. Can acheive decade more of isolation.
Commonly usd for very long, up to ~1/3mile professinal mobile video
runs.

I use Triax to feed a Doty style transformer located about 25' up.
The outer shield is the low side of the Hi-Z winding and connects to
it's own ground system.

Terry

Terry