[ICOM] Icom 706MKIIG vs Yaesu FT450

[John Geiger]

But that will lead to a noisy receiver.  That kind of
sensitivity isn't useful on the HF bands, where the
atmospheric noise floor is above that, and so is the
man made noise floor.  Most sensitive doesn't always
mean better.  Selectivity plays a big part in receiver
performance, as does the front end and blocking and
IMD dynamic range.  The amount of noise one hears is
also dependent on how many IMD products the receiver
is generating in a crowded band.  

I think QST measured the 706MKIIG noise floor with the
preamp off around -138DBm, which really isn't useful
in real life conditions because the typical noise
floor most of us have when an antenna is connected is
around -120DBm or so.  The rest of the sensitivity
just comes thru as noise.

73s John AA5JG



> The following are the specification for both radios
> for a "10db S/N" ratio:
>       IC-706		FT-450
> HF	.15 microvolts	.2 microvolts
> 6M	.12			.16
> VHF	.11			------
> 
> This would lead one to believe the 706 has a better
> receiver.
> End of subject. Its time we moved on to more
> fruitful discusson.
> 
>    * 73's Jim W5IFP *
> 
> 
> 
>    >-----Original Message-----
>    >From: icom-bounces at mailman.qth.net
>    >[mailto:icom-bounces at mailman.qth.net]On Behalf
> Of Paul Gates, KD3JF
>    >Sent: Saturday, May 17, 2008 12:13 PM
>    >To: ICOM Reflector
>    >Subject: RE: [ICOM] Icom 706MKIIG vs Yaesu FT450
>    >
>    >
>    >I gave you substance... If you do not want a
> noisy
>    >receiver do not choose the 706G
> 
> 
> ----
> Your Moderator: Dick Flanagan K7VC:
> icom-owner at mailman.qth.net
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>