[AMRadio] AM power

[Gary Schafer]

> -----Original Message-----
> From: Geoff Edmonson [mailto:w5omr at att.net]
> Sent: Wednesday, June 22, 2011 4:39 AM
> To: garyschafer at comcast.net; Discussion of AM Radio in the Amateur
> Service
> Subject: Re: [AMRadio] AM power
> 
> On 06/20/2011 10:56 PM, Gary Schafer wrote:
> > Hi Geoff,
> >
> > Well, your math is different than mine.
> >
> > I do agree with your 90 watts carrier, 1500 watts PEP and 100%
> negative
> > modulation with an SR of 4 (3:1 positive to negative peak ratio)
> >
> 
> no Gary - an SR of 4 is a ration of 4:1
> 
> Please Dont correct me to what I'm saying, by redefining what I'm
> saying.
> 
> 

Geoff,

3 volts positive to 1 volt negative is a 3:1 ratio of positive to negative.

John's SR 4 (symmetric ratio) that he came up with is based on a 3:1 ratio. 
Peak to peak voltage which in this case is 4 volts divided by the negative
value (which is 1) = an SR of 4

An SR of 4 is not a 4:1 ratio of positive to negative.

I am not redefining what you are saying. I am just showing it in another
form which I think is easier to calculate and understand than the SR.

73
Gary  K4FMX