Author Topic: Change out a light bulb on a 1500 foot tower  (Read 222 times)

Westbranch

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ClassicCrazy

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Re: Change out a light bulb on a 1500 foot tower
« Reply #1 on: April 20, 2018, 09:41:06 PM »
I have watched a bunch of tower climbing and antenna repair video's before. I wonder how much they turn down the transmitters when those guys are climbing on the antennas ?  Quite a bit I would imagine.

Larry
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welmore

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Re: Change out a light bulb on a 1500 foot tower
« Reply #2 on: April 22, 2018, 11:51:36 AM »
The large broadcast radio towers, including TV are out of service while climbing. Many of these, the structure is the antenna.

Two way, such as Police and Fire radios, cell systems and microwave antennas are attached to a supporting tower.  These towers are grounded.  Small two way systems, under 100 watts require shutdown only if the climber will pass with in 3 feet.  Two way systems over 100 watts are either turned down or out of service while climbing.

Microwave is save from behind the dish.  The link must be out of service if anyone or any thing will pass in front of the dish.


Westbranch

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Re: Change out a light bulb on a 1500 foot tower
« Reply #3 on: April 22, 2018, 01:25:54 PM »
Are those the antenna sections that he end up standing on at the top while he changes the light?  Would they be 'directional' if so?



KID FW1811 560W >C&D 24V 900Ah AGM
CL150 29032 V.2126-NW2097-GP2133 175A E-Panel WBjr, 3Px4s 140W > 24V 900Ah AGM,
2 Cisco WRT54GL i/c DD-WRT Rtr, NetGr DS104Hub Hughes 1100 Sat. Modem
Cotek ST1500 Inv  want a 24V  ROSIE Inverter
OmniCharge3024  Eu1/2/3000iGens
West Chilcotin 1680+W to come

ClassicCrazy

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Re: Change out a light bulb on a 1500 foot tower
« Reply #4 on: April 22, 2018, 05:04:25 PM »
Are those the antenna sections that he end up standing on at the top while he changes the light?  Would they be 'directional' if so?

Commercial antennas are designed to have specific radiation patterns for the coverage area they want to get. So for example  rather than having a vertical with even distribution all the way around - they may design the antenna to have some lobes which will reach a city at the expense of some other area .

Larry
system one
Classic 150 , 5s4p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal for 24v pack , Outback 3524 inverter
system two
Classic 150 ,5s 135 watt Kyocero , 16s Calb 100AH LiFePO4 , Outback VFX 3648 inverter
system three
Midnite KID MPPT 24 DC in to  12 volt AGM batterie

welmore

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Re: Change out a light bulb on a 1500 foot tower
« Reply #5 on: April 22, 2018, 09:52:57 PM »
Yes, the butterflies are the antenna active/reflector elements.  The configuration shown would be very near Omni directional.

I don't work on broadcast towers.  The highest tower I have worked on is 260 foot structure on top of a mountain.  That is around 17 floors. The view is always great from up there.   Towers seem to be getting higher, or at 60 years old, they just take longer to climb.