[Boatanchors] Using a SG-230 tuner on AM

[Gary Schafer]

Congratulations Bob! You finally got what everyone has been trying to tell
you all day.

And yes Terman is a little closer with the 1.99 times power for 3 dB.
Everyone just rounds off to 2x = 3 dB for doubling the power for general
calculations as it is so close.

73
Gary  K4FMX

> -----Original Message-----
> From: rbethman [mailto:rbethman at comcast.net]
> Sent: Monday, August 10, 2009 4:42 PM
> To: boatanchors at mailman.qth.net
> Cc: Gary Schafer
> Subject: Re: [Boatanchors] Using a SG-230 tuner on AM
> 
> You are trying to tell me the reference does not apply at the wattage
> being discussed.
> 
> A reference point MUST be specified when beginning a table.
> 
> The fact that the Author began at 0.006 Watts isn't really relevant.
> 
> If the power is doubled, it IS a 3dB increase, no matter where you
> begin.  To go from 100W to 200W is a 3dB increase in power.  if you go
> from 100W to 400W it is a 6dB increase in power.
> 
> Getting hung up on the reference point isn't the issue.  That is where
> it was chosen to begin the table, and I've also pulled out "The Radio
> Engineer's Handbook", Terman, 1943, page 1.
> 
> Guess what?  Same results.  Actually, very slight difference as they
> used a slide rule in that time frame.  So 3.0 dB increase in power shows
> as 1.99 times the original power.
> 
> Bob - N0DGN
> 
> Gary Schafer wrote:
> > Then why are you arguing about and using .006 watts as a reference when
> > everyone else was talking about a 100 watt transmitter?
> >
> >