Transmitter Grounding

Ground strap embedded in the floor

Ground strap embedded in the floor

All transmitters need to be grounded to prevent electrical shocks and minimize noise, RF and other. Those of us with liquid cooled transmitters also need to tie the heat exchangers, that are outside, to the transmitter inside. Where ever RF is concerned a ground strap made of wide thin copper is used, as you are aware RF travels down a conductor using the “skin” effect where all the energy travels on the outside or near the surface of a conductor. So a wide flat copper strap is best, the can range from 1″ to 12″ wide. At our tower we have a 12″ copper grounding strap that runs around the whole building. Each station can attach to it with their own strap and run it into their room.

Some installations have embedded the copper straps into the floor and then covered the with floor tile.

Finding the Ground

Finding the Ground

This gets the ground to the equipment using a direct route. But you can loose it over the long run, you can’t see it and after a couple of transmitter changes and new tile going down over the old its hard to say where the strap is.

When I put in my transmitter I installed the ground strap on the walls, I ran a 1×6 wood backing on the walls first and then mounted the 4″ ground strap onto that. It goes to my HVPS and the transmitter as well as a run to the roof where the heat exchanger is. Where two had to be connected they were folded over each other and then soldered with a torch. And I know where it is and can attach to it anywhere. Plus I think it look nice.

From floor to wall to equipment

From floor to wall to equipment

Attaching to incoming ground

Attaching to incoming ground

 

 

 

 

 

 

 

 

 

 

 

From tray to wall

From tray to wall

From wall to HVPS

From wall to HVPS

 

 

 

 

 

 

 

 

 

 

 

 

From wall to transmitter

From wall to transmitter