Dbowey wrote:
Several thousand unused AM rigs for six meters, and many MHz of
unused VHF spectrum.


Government agencies are hurting for spectrum. Now that the ARRL is under
Homeland Security you need to be thinking about the big frequency grab they are
getting ready to pull. It's far easier to take spectrum from the amateur radio
service than it is to force government agencies to make better use of what they
already have. You are first going to see the ARRL roll over for their new
boss, and give up some of 2 Meters. There are already people there who think
of 2M as "channelized."

Government agencies are hurting bigtime for UHF spectrum, and to a lesser
extent for VHF spectrum. But there is a huge amount of stuff in the HF
bands which is allocated for commercial and government use, which is no
longer used at all. Likewise the VHF-LO business band is mostly dead, and
right now you can get nationwide licenses for VHF-LO channels for a few
hundred bucks at auction.

I'd be happy to trade a chunk of 2M for an equivalent chunk of the VHF-LO
business band. What is going on is not that there is an increasing demand
for channels, but that the demand has changed. 800 MHz is crowded as hell
and everybody wants a chunk. 12 MHz is dead and nobody wants any.

The ARRL should be petitioning to grab some frequencies of our own.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

opcom wrote:
Hmm.. I suppose I could amplitude-modulate my Link 250-UFS 6M FM rig.

There is a LOT of AM aircraft radio gear out there which is currently
not legal for use because of the new narrowband channel allocations for
aircraft use. Those radios are basically available for the asking at your
local avionics shop.

And those radios are no problem to convert over to 2M AM. 6M wouldn't be
so easy.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

"opcom" wrote in message
...
Not studio quality.
Studio quality AM is +/- 5KHz.


Please quote the FCC regulations limiting AM BCB to 5 kHz.

Peter

On Mon, 14 Jul 2003 16:22:27 -0400, " Uncle Peter"
wrote:


"opcom" wrote in message
...
Not studio quality.
Studio quality AM is +/- 5KHz.


Please quote the FCC regulations limiting AM BCB to 5 kHz.

Not. Sharp rolloff at approximately 10KHz.

Uncle Peter wrote:
"opcom" wrote in message
...
Not studio quality.
Studio quality AM is +/- 5KHz.

Please quote the FCC regulations limiting AM BCB to 5 kHz.

Sadly, with all the NRSC crap in place, it's close to that. Didn't used to
be a decade ago. It's going to get worse with the new regulations that are
coming with IBOC too. AM quality is just going to hell and it's the result
of the listeners, the FCC, the station owners, and the radio manufacturers
all not giving a damn.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

I made no reference to FCC regulations concerning what is or is not studio quality.


Uncle Peter wrote:

"opcom" wrote in message
...
Not studio quality.
Studio quality AM is +/- 5KHz.

Please quote the FCC regulations limiting AM BCB to 5 kHz.

Peter

" Uncle Peter" wrote:
"opcom" wrote:
Not studio quality.
Studio quality AM is +/- 5KHz.


Please quote the FCC regulations limiting AM BCB to 5 kHz.

I haven't seen a BCB Station license in decades, but every other
commercial station license I've seen had the bandwidth indicated
on the license.

Is that also true with AM Broadcasting, and if true, what
bandwidth is allowed?

--
Floyd L. Davidson http://web.newsguy.com/floyd_davidson
Ukpeagvik (Barrow, Alaska)

opcom wrote:
Not studio quality.
Studio quality AM is +/- 5KHz.

"Studio quality AM" is not a valid term. AM Broadcast has never
been up to "Studio Quality" standards, which would be _at_
_least_ 20 to 20K Hz.

AM Broadcast Band quality is 5K Hz.

+/- 3000-3500 Hz is communications quality, and fine for
AM. but we don't need more rules.

Why so wide?

SSB? 2.5KHz is fine. I am speaking up for the old iron. I do
limit my AM to +/-3KHz in the speech amp.

There is no difference at all between the audio response
necessary for SSB and AM. AM, because it has both sidebands,
will necessarily take up twice the RF spectrum for the same
audio response, but in fact 2.4KHz (400Hz to 2800Hz) is actually
*preferable* to higher fidelity audio response when the purpose
is voice communications. (Ma Bell did a bazillion studies on
this decades ago, so it is not exactly new information.)

"WB3FUP (Mike Hall)" wrote:

And voice communications requires studio quality
audio WHY

Heh heh, do we need to rub it in? (Yes, and in one word
the answer is: ego.)

--
Floyd L. Davidson http://web.newsguy.com/floyd_davidson
Ukpeagvik (Barrow, Alaska)

IBOC requires the AM sidebands to be kept under 5kHz because of
the Digital Sidebands. Fortunately, the stations running IBOC are
getting a lot of flack from listeners regarding the horrid AM bandwidths.


Actually, there is an IBOC mode where the analog signal extends to 8
kHz. This overlaps the digital signal occupying 5 to 10 kHz and lowers
its data rate. I think the station can pick whichever analog bandwidth
it wants (that is, I don't think the decision is subject to FCC
rules).

Brian

I did not know much about this, but here's the spec.

http://hraunfoss.fcc.gov/edocs_publi...C-02-286A3.pdf

Uncle Peter wrote:

"Scott Dorsey" wrote in message
...
Uncle Peter wrote:
"opcom" wrote in message
...
Not studio quality.
Studio quality AM is +/- 5KHz.

Please quote the FCC regulations limiting AM BCB to 5 kHz.

Sadly, with all the NRSC crap in place, it's close to that. Didn't used
to
be a decade ago. It's going to get worse with the new regulations that
are
coming with IBOC too. AM quality is just going to hell and it's the
result
of the listeners, the FCC, the station owners, and the radio manufacturers
all not giving a damn.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

IBOC requires the AM sidebands to be kept under 5kHz because of
the Digital Sidebands. Fortunately, the stations running IBOC are
getting a lot of flack from listeners regarding the horrid AM bandwidths.