[BC] Part 15 LPAM Question?

[Richard Fry]

>In these cases the transmitter case was bolted to the
>structual members of the building. What's the 'ground lead'
>there? The length of the bolt (about 1/2 inch) or the
>four story gym?
________________

Whatever exposed conductors that are connected to the tx chassis will 
radiate on a Part 15 AM system, until they reach a true r-f ground buried 
in the earth.  So yes, the structural steel in the building was/is part of 
the radiating lengths of those systems.

Paper 3 at http://rfry.org/Software%20&%20Misc%20Papers.htm includes a NEC 
study showing why this is true.

RF