[TenTec] 3 db loss

[GARY HUBER]

Paul, there's a lot of people who do NOT understand 3 dB = 2X, 6 dB = 4X, 10 
dB= 10X, 20 dB = 100X, 30 dB = 1000X;  where m= milli-Watt and W = Watt 30 
dBm = 1 Watt and 30 dBW = 1000 Watts. Conversely -3 dB is one half and -6 db 
is one quarter. etc.

If you double the power on 160, it makes a big difference at a distance, but 
not much difference locally. Locally you can generally follow power increase 
with a receiver S-meter if it follows the 6 dB per S-unit rule, at least it 
works that way with our local 160 AM net.


73 ES DX,
Gary -- AB9M
-----Original Message----- 
From: Paul DeWitte
Sent: Saturday, August 03, 2013 4:57 PM
To: tentec at contesting.com
Subject: [TenTec] 3 db loss

I do not remember who said it, but he said that for every 3 db there is
another layer of DX to work.

That is especially true on 160m where 2-3 db means contact or no contact.
And that works both ways when chasing DX.

73 Paul

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