Yes, that's what the book says.
However, I'm talking about someone out in a mobile environment where you
have many other factors in play, including ambient road noise. Most people
are hard pressed to be able to notice a 6 dB change under those conditions.
Since we are talking repeaters here, most of our users are on a mobile or
HT, outside of a quiet, stable environment. Usually moving a couple of
inches or feet is going to make way more difference than 6 dB.
That's my "real world" take anyway.
Base station to base station with antennas mounted in the clear and a quiet
shack, you'll probably be able to hear 3 dB, assuming you are not already
full quieting.
Chuck
WB2EDV
----- Original Message -----
From: "mch" <[EMAIL PROTECTED]>
To: <Repeater-Builder@yahoogroups.com>
Sent: Saturday, August 28, 2004 1:59 PM
Subject: Re: [Repeater-Builder] db comparisons
> I've always been taught and read that a 3dB increase (or decrease) is
> the point at which the user can first notice that the signal has
> changed. You can gain 3dB by either doubling your power (or ERP), or by
> doubling the antenna height. Of course, this does not take hills into
> account where your height doubling just happens to clear a hill. This
> assumes that your antenna is in flat land or above the hills (or trees).
>
> Joe M.
>
> [EMAIL PROTECTED] wrote:
> >
> > In FM mobile service, a difference in 6 dB is usually just barely
> > perceivable by most users. Now, I'm talking about out in the field
> > and just listening to the signal -- no meters, just your ear.
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
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