OT: Leaky coax

[Ken G Kopp]

Lots of "leaky" coax in use, both passive and active.  Used in mines,
buildings, both large and tall, paging systems in hospitals, etc.

Here in the mountains of Montana most RR tunnels have it for carrying
control signals between front and rear multiple-engine units.  There are
antennas connect to the coax at both ends.

Trivia: It's not unusual for a grain train to be much longer that the
tunnel through the Continental Divide.

73
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[John Simmons]

I designed several in-building systems with leaky coax, some over 1000'.
I have even used RG6 with the shield removed every 18" with a grinder
and then covered with Scotch 33. This worked very well and made my boss
very happy! This was for 152 MHz paging. Making the shield slots was
easy and I could do an entire 1000' box of cable in an hour or so.

John NI0K
> Here in the mountains of Montana most RR tunnels have it for carrying
> control signals between front and rear multiple-engine units.  There
> are
> antennas connect to the coax at both ends.
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[Barry]

Ken G Kopp wrote

Trivia: It's not unusual for a grain train to be much longer that the
tunnel through the Continental Divide.

Reminiscing back to my third semester of Physics in college (Relativity), it depends on the speed of the train  :-)

Barry W2UP