Remember, on the receive side the desired signal may go down 3db but the
noise also goes down 3db. That's why you can get away with inefficient Rx
antennas like beverages, pennants, EWE's, K9AY's, etc. If you make an
antenna with a good directive pattern, even though it's inefficient and the
desired signal goes down, the noise also goes down, but you can improve the
S/N ratio and use a preamp to bring the levels back up and still wind up
having improved the S/N ratio.
Gene / W2LU
----- Original Message -----
From: "Charlie Gallo" <Charlie@TheGallos.com>
To: "Jim Thomson" <jim.thom@telus.net>
Cc: <towertalk@contesting.com>
Sent: Monday, April 09, 2012 12:35 AM
Subject: Re: [TowerTalk] Coax
>
> On 4/9/2012 Jim Thomson wrote:
>
> ...snip... You end up with 3 x choices. (a) increase the
>> power output, and-or replace amp with a much bigger one,
>> like double the capacity. (B) obtain much bigger coax. C use a
>> combo of A+B
>
> ...snip...
>
> Actually, that only makes up the transmit side - that S3 signal just above
> the noise goes down 3 dB too. I think fighting for the Rx signal is just,
> if not more important
>
> --
> 73 de KG2V - Charles Gallo
> Quality Custom Machine-shop work for the radio amateur (sm)
>
> _______________________________________________
>
>
>
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