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

[George, W5YR]

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:w5yr@att.net>





----- Original Message -----
From: "David J. Ring Jr - N1EA" <n1ea@arrl.net>
To: <icom@mailman.qth.net>
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