[Elecraft] KPA-1500 Efficiency As A Function of Input Power

[Fred Jensen]

Yes.  Electricity cost to generate the RF that earns the revenue is a 
major part of the broadcast station budget.  Not so much for amateurs.  
Since FM is constant envelope modulation, it makes sense it would have a 
lower overall efficiency.  Even Rush Limbaugh has to take a breath 
occasionally on AM ... it makes no difference on FM. [:-))

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 8/17/2018 3:45 PM, W2xj wrote:
> Today in broadcast we generally rate transmitters by AC in to RF out. For AM transmitters that figure is in the low 90 percent range and the current FMs run at about 74% AC in to RF out.
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