[BC] need a NON-technical explanation

[PeterH]

On Nov 12, 2010, at 8:04 AM, RichardBJohnson at comcast.net wrote:

> Prior to 1960, the MKS system of measurements was the worldwide  
> standard (Meter kilogram second). Cycles per second was used within  
> this standard. When the SI units (from the French Le Système  
> International d'Unités ) was forced upon us, cycles were dropped,  
> in favor of naming everything after some person.

However, LONG after the MKS system (and kHz) was adopted, mV/m/kW at  
1 mile was retained by the FCC, possibly until "Rio", after which mV/ 
m/kW at 1 km was adopted.

The older editions of Part 73 state the minimum (AM) radiator  
efficiencies as 225 mV/m/kW at 1 mile (Class I), 175 mV/m/kW at 1  
mile (Class II and Class III) and 150 mV/m/kW at 1 mile (Class IV).

The newer editions state the same as 362.10 mV/m/kW at 1 mile (Class  
A), 281.63 mV/m/kW at 1 mile (Class B and Class D) and 241.40 mV/m/kW  
at 1 mile (Class C).