[TowerTalk] 5 db required to see?

[i4jmy@iol.it]

Not the contesters, but common sense in nearly any antenna application 
were signal levels are unpredictable requires the losses are minimized 
and gain maximized.
No matter if the antenna is a complex array or a flagpole, stated 
what's the supposed goal (anything is allowable), the best choice is to 
decide the simpler and most economical way not to trash energy.

The real problem is that dBs are "small numbers" not used in common 
life and some people doesn't realize that adding dBs (logarithm is a 
pure number) lead to multiply the phisical entity.

Can we consider a slight one a 1 dB reduction in our monthly wages ?
And 1 dB per year ?
And 6 dB per year ?
And 12 dB per year ? 

73,
Mauri I4JMY


> ---------- Initial message -----------
> 
> From    : owner-towertalk@contesting.com
> To      : towertalk@contesting.com
> Cc      : 
> Date    : Thu, 25 May 2000 07:36:14 +0100
> Subject : Re: [TowerTalk] 5 db required to see?
> 
> 
> Guy Olinger, K2AV wrote:
> 
> >He did refer in another part of the presentation to 2 dB as making a
> >difference. (This is refreshing compared to some posts here back a 
ways
> >which were trying to tout 0.2 and 0.3 as "significant".) 
> 
> I don't think anybody really meant that 0.2-0.3dB was "significant" on
> its own (if they had, it would have been me talking about moonbounce).
> The point is that in order to pick up say 2dB overall, you do find
> yourself chasing down much smaller losses. If you can find several of
> these, and eliminate them, that's how it can add up to something
> significant.
> 
> >And I can see 2
> >dB making a difference on a band with "flat noise" and a marginal 
path
> >with respect to the powers/antennas involved. If the propagation is
> >"in", though, I don't think it will be perceptible.
> 
> Everybody agrees with that.
> 
> However, contesters like Pete also point out that over several 
thousand
> QSOs with a large range of signal strengths and condx, even a small
> advantage must pay off statist
QSO totals and
> multipliers. It may not be a decisive edge, but the contest mentality 
is
> that you gotta try for it.
> 
> 73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
>                           'In Practice' columnist for RadCom (RSGB)
>                            http://www.ifwtech.com/g3sek
> 
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