[BC] Long Island, NY Metro PCS Cables Cut
Mike McCarthy
towers at mre.com
Sun Dec 4 05:29:17 CST 2011
The bazooka coupling is another form of shunting the base. One of my
former clients used it and for the most part worked fine. The challenge
is to make sure the shutting line is truly invisible where the base
impedance doesn't change from true floating and then to keep that
coupling bond to the tower as solid as possible without impacting the
line. Those jumpers tended to get blown apart by lightning strikes.
The other challenge surrounds adding lines. Because the tower's
apparent face size would increase with more lines added, the base
impedance would in fact change and require re-tapping the bonding
straps. The more lines, the more wild things get. A tower full of lines
(such as the tower referenced in this thread), I would argue the bonding
aspect would be an absolute nightmare to craft a reasonable height.
MM
On 12/3/2011 10:17 PM, Ron Youvan wrote:
> Dana Puopolo wrote:
>
>> I once saw this in reverse. They ran all the coaxes up the tower and grounded
>> each one at the tower base-then insulated them until they all connected to the
>> tower about 125 feet up. Then they insulated the tower base and series fed
>> it. In essence, they used the bottom of the tower as a skirt and the lines as
>> the tower.
> The line/s connect to the tower 1/4 wl up, it is a form of choke isolation.
>
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