[Icom] Summary of 60 Meter Performance of IC-765 (long)

Thu, 5 Jun 2003 02:57:36 -0400

I agree George.  I think it's odd.

What do the YLs do?  Offset -2000 to make up for the higher voice frequency.

FCC would have been better off specifying the frequencies as the ITU does
(and they also do) with carrier frequencies.

See a listing like this one for marine http://www.mmsn.org/ncs/HFfreqs.htm

Everyone is on the same frequency - the channels are 3.0 kHz spaced - you
can operate channel 401 right next to channel 402 fine. (4357kHz vs.
4360kHz) all channels USB from 1.700 MHz to 25 MHz.

Directprinting radioteleprinter is done the same way, but you have a little
bit of math to do to offset the modem frequency.

73

DR
----- Original Message ----- 
From: "George, W5YR" <[email protected]>
To: <[email protected]>
Sent: Thursday, June 05, 2003 2:07 AM
Subject: Re: [Icom] Summary of 60 Meter Performance of IC-765 (long)

> It has to be a Gentleman's Agreement and some common sense, David. To stay
> within the channel, our suppressed carrier indicating dials have to be set
> on the lower channel edge "somewhere." Our English cousins use an offset
> of -1500 Hz and ARRL is recommending the same. Makes sense as long as
> everyone tries to do the same. So the dial frequency *is* virtually set at
> 1500 Hz below the specified center frequency for each channel. I don't
know
> from firsthand experience but I am told this is the most common method for
> designating frequency in the military.
>
> Where we are in a world of hurt is the fact that many radios simply have
> neither the dial accuracy or stability to ensure that the entire sideband
> remains within the channel. As my example tried to show, a typical 2.4 kHz
> sideband filter setup produces an upper limit of 2910 Hz and a lower limit
> of 205 Hz. The dial doesn't have to be off very far to scoot one side or
the
> other of that sideband into enemy territory.
>
> Fortunately, I have no intention or interest in operating 60 meters, but I
> would hate for ham radio to get a black eye over it.
>
> 73/72, George
> Amateur Radio W5YR -  the Yellow Rose of Texas
> Fairview, TX 30 mi NE of Dallas in Collin county EM13QE
> "In the 57th year and it just keeps getting better!"
> <mailto:[email protected]>
>
>
>
>
>
> ----- Original Message -----
> From: "David J. Ring Jr - N1EA" <[email protected]>
> To: <[email protected]>
> Sent: Wednesday, June 04, 2003 11:46 PM
> Subject: Re: [Icom] Summary of 60 Meter Performance of IC-765 (long)
>
>
> > You're right on the money - did you notice ONE thing?
> >
> > The channel bandwidth is specified, and the center of the channel is
> > specified, but the carrier frequency is NOT specified.
> >
> > THERE IS NO SERVICE THAT THE FCC ADMINISTERS THAT HAS CHANNELS FOR
U.S.B.
> > AND THE CARRIER FREQUENCY IS NOT SPECIFIED.
> >
> > How dumb can the FCC get?  As far as I'm concerned it has been a steady
> > decline in sense since about 1975.
> >
> > Reaganomics didn't work - the FCC DID make $$$ in Auctions, but HOW will
> we
> > get on the same channel when the carrier frequency isn't named?
> >
> > Channel up those ICOMs.
> >
> > 73
> >
> > DR
>
> ----
> Your Moderator: Dick Flanagan W6OLD, [email protected]
> Icom Users Net: Sundays, 1700Z, 14.315 MHz
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>