I'm not saying there won't be situations where the signal will be more
comfortable to listen to by reducing RF gain, I'm just saying that from
a pure physics point of view, the signal to noise ratio does not change
as RF gain is reduced.
And I'm not saying you don't need an RF gain control.
Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com
On 1/20/2014 4:32 PM, José Félix Ballester wrote:
All,
For whatever reason reducing RF gain on my Eagle works much better for
improving voice intelligibility than on my previous Icom 756 Pro.
73 de Pepe WP3HW
On Jan 20, 2014, at 5:28 PM, Rick - DJ0IP / NJ0IP<Rick@DJ0IP.de> wrote:
Carl, here's what I told Rob when he said the same thing to me.
Some people (me for instance) have a hearing problem in that we cannot hear
much of anything in the presence of moderate ambient noise. If we reduce
the RF gain slowly, not much happens but then suddenly the desired signal
pops up out of nowhere.
I have a really bad problem working the booth at hamfests. The customer
across the table from me is nearly shouting at me and I can't understand a
word he's saying. My buddy working the booth with me is often 10' behind me
on the other side of the booth and he understands what my customer said.
It has nothing to do with radio technology. It is hearing defect. For us,
it is as though the signal to noise ratio suddenly improves - a lot. The
way the RF gain works in Ten-Tec radios is a big advantage for me.
73 - Rick, DJ0IP
(Nr. Frankfurt am Main)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Carl
Moreschi
Sent: Monday, January 20, 2014 10:21 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] What's Going to be Next
I said this before and I will say this again. Rob Sherwood agrees with me
on this. And I know I am going to get beat up on this but I'm tired of
hearing wrong things about RF gain.
RF gain has absolutely no effect on signal to noise ratio. Reducing RF gain
reduces the noise. But it also reduces the signal in the same proportion.
It is useful to reduce the RF gain in situations where the signal is much
higher than the noise so that noise is not heard in between transmissions.
But to hear the very weakest signals, the RF gain must be high enough to
hear some noise.
Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com
On 1/20/2014 3:55 PM, Bob McGraw - K4TAX wrote:
The answer is a resounding YES. The implementation of the RF Gain, as
it is integrated with the AGC system, makes for effective performance
with regard to signal vs. noise.
73
Bob, K4TAX
----- Original Message ----- From: "Charles Nagel"
<cnagel@sbcglobal.net>
To:<tentec@contesting.com>
Sent: Monday, January 20, 2014 12:40 PM
Subject: [TenTec] What's Going to be Next
Bob, K4TAX,
One of the features I always liked about the Omni VII was its broadly
tuned RF gain which had the ability to reduce noise while appearing
to enhance or maintain the signal you are trying to hear. In your
opinion does the Eagle's RF gain function similarly? Most RF gains
including K3's reduce noise and signal and do it at the maximum
nearly fully clockwise position.
73,
Charles, K0CW
Sent from my iPad
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