[ICOM] Sherwood Engineering test numbers

Mon Oct 16 22:26:40 EDT 2006

John,

Before I buy a new radio I talk to lots of guys who are already using them.
I am never the first guy on the block to buy a new radio.

I struggled when I left my old Kenwood TS-930S radios behind in 1990 and went to
the Icom IC-765.
I have been 100% Icom ever since. I asked lots of 765 owners how they liked the
radio before I made the change.

Rob Sherwood's measurements are important, but you must talk to users of the
radio you might be interested in. They need to be using the radio like you will
(similar antennas, etc.) to get a good feel. Then take a test drive before you
buy!

By the way, I agree with Jan, the IC-7800 is the BEST radio I have ever used!
I still love the IC-781 too! I'll never sell my IC765s!

73!
Tim K3LR

100% Icom Multi Multi contest station
http://www.k3lr.com

John Geiger wrote:

> Hi Tim,
>
> Given that this is true, how can one tell whether
> something has a good receiver or not, other than by
> using it?  It seems that the numbers are very limited,
> then.  And many of us can't afford to be the guinea
> pig for new radios that come out.
>
> 73s John W5TD
>
> --- Tim Duffy K3LR <k3lr at k3lr.com> wrote:
>
> > Hi John:
> >
> > That is why I said "lots of strong signals on the
> > band".
> >
> > I have worked with Rob Sherwood for over 30 years.
> > His tests are the best.
> >
> > The way all of the receiver tests are performed,
> > does not give you a
> > look into "real world" situations. Using two tones
> > gives you a standard and
> > some guidance on which to compare, but you have to
> > look further in to see the
> > real world story.
> >
> > On the air means LOTS of strong signals. That is
> > MUCH different than the lab.
> >
> > 73!
> > Tim K3LR
> >
> > John Geiger wrote:
> >
> > > Hi Tim,
> > >
> > > Yes, I have heard others say that also.  But that
> > > still doesn't get down to my original question-how
> > did
> > > it score so well on the IMD DR Sherwood test??
> > Better
> > > than many radios considered contest radios.
> > >
> > > 73s John W5TD
> > >
> > > --- Tim Duffy K3LR <k3lr at k3lr.com> wrote:
> > >
> > > > John:
> > > >
> > > > My 706 is a much better radio when using
> > antennas
> > > > that are somewhat inefficient
> > > > such as mobile and portable antennas.
> > > > If I hook my 706 up to a beam or a full-size
> > dipole,
> > > > the attenuators do a
> > > > wonderful job of protecting the front end and
> > making
> > > > the radio usable.
> > > >
> > > > Remember that the IC706 series receiver was
> > never
> > > > intended to compete along side
> > > > radios that cost far more and perform much
> > better
> > > > with lots of strong signals on
> > > > the band.
> > > >
> > > > 73!
> > > > Tim K3LR
> > > >
> > > > John Luthy wrote:
> > > >
> > > > > John,
> > > > >
> > > > > First I am NOT any kind of expert,
> > > > >
> > > > > But I have noticed that my 706MkIIg is almost
> > hard
> > > > to listen to,
> > > > > mostly because it hears everything, so I
> > wonder if
> > > > it is fed a small
> > > > > signal in a lab it might look like a very good
> > > > reciver,
> > > > > So I wonder if I would be happier with my 706
> > if
> > > > I had a differnt
> > > > > filters in it.
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "John Geiger" <johngeig at yahoo.com>
> > > > > To: <cq-contest at contesting.com>;
> > > > <yaesu at mailman.qth.net>;
> > > > > <icom at mailman.qth.net>;
> > <yaesu at contesting.com>;
> > > > > <dx-list at yahoogroups.com>
> > > > > Sent: Sunday, October 15, 2006 1:58 PM
> > > > > Subject: [ICOM] Sherwood Engineering test
> > numbers
> > > > >
> > > > > > How much stock does everyone place in the
> > > > Sherwood
> > > > > > Engineering receiver test numbers
> > > > (www.sherweng.com)?
> > > > > > While I admit that the 2khz spacing is a
> > much
> > > > more
> > > > > > useful measurement than the 20khz the ARRL
> > has
> > > > used
> > > > > > for a long time, and I believe that Rob
> > Sherwood
> > > > knows
> > > > > > what he is talking about when he tests
> > > > receivers, I
> > > > > > have a hard time believing some of his
> > numbers.
> > > > > >
> > > > > > For example, he measures the 2khz IMD DR for
> > the
> > > > Icom
> > > > > > 706MKIIG at 74db. This places it right in
> > line
> > > > with
> > > > > > the PROII and PROIII at 75db, and better
> > than
> > > > the
> > > > > > 756PRO (71db), FT1000D (69db), FT1000mp MK V
> > > > (69db),
> > > > > > and the Icom 746 (70db).  Now I have owned
> > many
> > > > of
> > > > > > these radios, and I did not find the
> > 706MKIIG to
> > > > have
> > > > > > that good of a receiver, definitely not
> > better
> > > > than
> > > > > > the 756PRO or the Yaesu FT1000 series.  It
> > > > overloaded
> > > > > > pretty bad under contest conditions.  What
> > am I
> > > > > > missing in his measurements, that makes the
> > > > 706MKIIG
> > > > > > look so much better than these other radios?
> > > > > >
> > > > > > 73s John W5TD
> > > > > >
> > > > > >
> > > >
> > __________________________________________________
> > > > > > Do You Yahoo!?
> > > > > > Tired of spam?  Yahoo! Mail has the best
> > spam
> > > > protection around
> > > > > > http://mail.yahoo.com
> > > > > > ----
> > > > > > Your Moderator: Dick Flanagan K7VC,
> > > > icom-owner at mailman.qth.net
> > > > > > Icom Users Net: Sundays, 1700Z, 14.316 MHz
> > > > > > Icom FAQ: http://www.qsl.net/icom/
> > > > >
> > > > > ----
> > > > > Your Moderator: Dick Flanagan K7VC,
> > > > icom-owner at mailman.qth.net
> > > > > Icom Users Net: Sundays, 1700Z, 14.316 MHz
> > > > > Icom FAQ: http://www.qsl.net/icom/
> > > >
> > > >
> > > > ----
> > > > Your Moderator: Dick Flanagan K7VC,
> > > > icom-owner at mailman.qth.net
> > > > Icom Users Net: Sundays, 1700Z, 14.316 MHz
> > > > Icom FAQ: http://www.qsl.net/icom/
> > > >
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Tired of spam?  Yahoo! Mail has the best spam
> > protection around
> > > http://mail.yahoo.com
> > > ----
> > > Your Moderator: Dick Flanagan K7VC,
> > icom-owner at mailman.qth.net
> > > Icom Users Net: Sundays, 1700Z, 14.316 MHz
> > > Icom FAQ: http://www.qsl.net/icom/
> >
> >
> > ----
> > Your Moderator: Dick Flanagan K7VC,
> > icom-owner at mailman.qth.net
> > Icom Users Net: Sundays, 1700Z, 14.316 MHz
> > Icom FAQ: http://www.qsl.net/icom/
> >
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/