no, the sensativity stays the same, how ever many micro volts your rig is
capable of detecting and processing.
However, if you have a higher or lower amount of internal receiver noise
created inside the radio, then it can alter how much you hear.
In the case of the 746 verses the ts2000, the 746 has very little internally
generated noise, so you hear what the receiver hears much better. The
ts2000 apparently has a noisier receiver, in other words, a higher noise
floor that blocks out more of the weaker signals because you just can't pull
them out.
I am fairly sure, but without looking at the manuals, not quite sure, that
the ic746/56 and ts2000, and most modern HF radios exhibit vertually the
same claimed sensativity levels on the same bands and modes.
That is my understanding, feel free to give a more in depth explanation as
to why this would be wrong, the part about sensativity and noise.
You can only hear so much on certain frequencies....but you can alter the
noise levels and give you more of the signal that is already there to hear.
73
Colin, V A6BKX
----- Original Message -----
From: "Louis Kim Kline" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, March 07, 2006 5:11 PM
Subject: Re: thinking of changing rigs
> Excuse me, but isn't sensitivity measured by measuring the signal to noise
> ratio at a given signal level. If you lower the noise floor, you raise
the
> sensitivity, unless your modification also lowers the signal level! In
the
> latter case, you would have just reinvented the RF Gain control!
>
> 73, de Lou K2LKK
>
>
>
> At 10:21 AM 3/7/2006 -0700, you wrote:
> >I don't think icoms are any more sensative then Kenwoods, but i do know
they
> >reduce their noise floor levels.
> >I know there is a mod for the ts2000 that will reduce the noise floor to
> >that of an ic746/756
> >So, even though they are no more sensative then kenwoods, you will hear
more
> >on the icoms.
> >73
> >Colin, V A6BKX
> >----- Original Message -----
> >From: "Steve Dresser" <[log in to unmask]>
> >To: <[log in to unmask]>
> >Sent: Tuesday, March 07, 2006 7:29 AM
> >Subject: Re: thinking of changing rigs
> >
> >
> > > Lou,
> > >
> > > I've always thought Icoms were way ahead of Kenwoods in the
> > > sensitivity and noise department, but their lack of speech feedback
> > > makes them difficult for us to use. That was less of an issue when
> > > there were more controls on the front panel, but today everything is
> > > buried in menus and it makes operation tough for us. It's just so
> > > nice to be able to access everything, and that's why I bought my 480.
> > >
> > > Steve
> > >
> > > On Monday 3/6/06 22:37 Louis Kim Kline wrote:
> > > >Hi.
> > > >
> > > >I bought the TS2000S mostly because of accessibility. There are
things I
> > > >don't like about the radio. It isn't as sensitive as some of my
older
> > > >equipment, and I don't like the AGC on the TS2000S. Actually the
> >receiver
> > > >on my Kenwood TS690S will outperform the TS2000S.
> > > >
> > > >Anyway, I think my favorite transceiver from a receiver performance
> > > >standpoint was the Icom IC735--zI always had all the sensitivity that
I
> > > >wanted, and it was somehow more intelligible in noisy band conditions
> >than
> > > >any of my Kenwood radios. Regarding the IC746, I would have gone
with
> >that
> > > >radio if I could have solved the accessibility problem, and there are
> > > >somethings that I don't even care that much about. I find for
example in
> > > >the TS2000S that the menus are pretty much set and forget. I presume
> >that
> > > >the Icom is like that also. PL tones are a much bigger deal, as is
> > > >repeater offsets.
> > > >
> > > >
> > > >If Icom would even let you program it from a computer like the
TS2000S,
> > > >that would be a manageable arrangement. If they did that the way
that
> > > >Kenwood did with the '2000, maybe I would still be running an Icom
IC706
> >MkIIG
> > > >
> > > >73, de Lou K2LKK
> > > >
> > > >
> > > >
> > > >At 09:07 AM 3/6/2006 -0500, you wrote:
> > > > > Gary:
> > > > >
> > > > >Although I don't use the IC746 pro, I do have the Icom 746 basic
rig,
> >and
> > > > >love it. I have heard others say that they feel the sensitivity
and
> > > > >selectivity of the 746 line is better than that for the TS2000. I
> >haven't
> > > > >had a TS2000, though, to do a direct comparison myself.
> > > > >
> > > > >The only down side to the 746 is that you probably will need some
> >sighted
> > > > >assistance to get certain things set up, since the menus and some
other
> > > > >functions (like repeater off-sets and PL tone selection) are not
"user
> > > > >friendly". Once you get repeaters programmed into memories,
though,
> >those
> > > > >problems are solved.
> > > > >
> > > > >I don't know how helpful this will be to you, and I'm sure others
on
> >the
> > > > >list will have their own thoughts and opinions.
> > > > >
> > > > >If you have any more questions regarding my experience with the
746,
> >feel
> > > > >free to ask.
> > > > >
> > > > >73 from Tom Behler: KB8TYJ
> > > > >
> > > > >----- Original Message -----
> > > > >From: "Gary Lee" <[log in to unmask]>
> > > > >To: <[log in to unmask]>
> > > > >Sent: Sunday, March 05, 2006 10:42 PM
> > > > >Subject: thinking of changing rigs
> > > > >
> > > > >
> > > > > > I am thinking of changing rigs from my ts2000.
> > > > > >
> > > > > > Candidates are
> > > > > > icom 746 pro
> > > > > > icom 756 pro
> > > > > > kenwood ts480
> > > > > >
> > > > > > I would like to hear from anyone who has actually operated these
> >rigs to
> > > > > > get a feel for their performance and useability.
> > > > > >
> > > > > > I don't need anything over 100 wattts, in fact, any other rig
> >suggestions
> > > > > > are welcome.
> > > > > > I'm mostly looking for better selectivity and sensitivity than I
> >seem to
> > > > > > get with the 2000.
> > > > > >
> > > > > > Thanks for any light you can shed on this.
> > > > > > 73
> > > > > >
> > > >
> > > >Louis Kim Kline
> > > >A.R.S. K2LKK
> > > >Home e-mail: [log in to unmask]
> > > >Work e-mail: [log in to unmask]
> > > >Work Telephone: (585) 697-5753
> > >
>
> Louis Kim Kline
> A.R.S. K2LKK
> Home e-mail: [log in to unmask]
> Work e-mail: [log in to unmask]
> Work Telephone: (585) 697-5753
>
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