dave wrote:
harddisque wrote:
Maybe we will eventually have DRM for AM here in the US.

IBOC on AM is a disaster.



AM radio sounds great if you know what you're doing. The NRSC mask
needs to go away, along with every station (or night-time operation)
authorized since the late '70s.



You're pretty much right on.

Standard AM does have more background noise at low and moderate
signal strengths. And the extreme high end, above, say, 10 kHz, is
hard to get perfectly flat at some (but not all) directional facilities.

But with analogue AM you can transmit high-fidelity audio with no
data compression whatever (and none of its attendant artifacts) in
30 kHz of RF bandwidth. You can't do that with IBOC of either the AM
or FM varieties.

And with standard analogue AM, no de-emphasis need be used on the
receiving end, so high frequencies that are 100 per cent. modulated
come through at full level on the receiving end. You can't do that
with pre-emphasized FM.

When WEAM 1390 in Arlington ran its progressive format in the 1970s,
they used very modest amounts of optical compression and peak
limiting, and subtle equalization -- and they sounded absolutely
stunning on my McKay Dymek AM5 tuner.

With all good wishes,


Kevin, WB4AIO.
--
http://kevinalfredstrom.com/

RHF wrote:

.
RHF's Plan For The "HD" AM/MW Radio Band :
Going All Digital And Beyond !

.

You can't decode digital with a diode and a capacitor. We need some kind
of radio that'll work after the Great Collapse.

On Sep 6, 10:41*am, dave wrote:
RHF wrote:
* .
RHF's Plan For The "HD" AM/MW Radio Band :
Going All Digital And Beyond !
* .

- You can't decode digital with a diode
- and a capacitor. We need some kind
- of radio that'll work after the Great Collapse.

Dave -if- there is a 'Great Collapse'
no one will be working and

no radio stations will be on the air . . .

no electrical power, natural gas and heating oil . . .

no gasoline for the cars and trucks . . .

Dave - just you, your axe and the
all american wood pile . . .

dave - hope you do have an axe ! - pal ~ RHF

"Bob Dobbs" wrote in message
news:4c861aa4.11844859@chupacabra...
dave wrote:
We need some kind
of radio that'll work after the Great Collapse.

Why would anyone need some kind of working radio
to tune in all those stations (radios themselves) that won't be working?
Sort of a paradox, eh?
...or is it only receivers that will mysteriously stop working?

If enough of me survives any 'great collapse'
to be able to listen to something, I bet my radios will too.

Anyone transmitting at a time such as that would be running very limited
power, likely no more than a couple hundred watts (the max power output of a
common ham mobile rig that can be run from 12V battery power), since it
would be likely that no commercial power would be available.

On Sep 7, 4:06*am, Bob Dobbs wrote:
dave wrote:
We need some kind
of radio that'll work after the Great Collapse.

Why would anyone need some kind of working radio
to tune in all those stations (radios themselves) that won't be working?
Sort of a paradox, eh?
...or is it only receivers that will mysteriously stop working?

If enough of me survives any 'great collapse'
to be able to listen to something, I bet my radios will too.

--

Operator Bob
Echo Charlie 42

Sort of like a Farmer in the 1920s who bought a
"Farm Radio"; and when his Son asked him 'why'
the Farmer replied 'why' Son some day we will
have elect-tric-city just like your Uncle in the City.
http://everything2.com/title/Farm+radio

Actually so-called "Farm Radios" were usually
powered by Batteries and some/many Farms
had their own Electrical Generating Systems.
http://www.livinghistoryfarm.org/far...0s/life_18.htm
Note - Back then you could not go off-the-grid . . .
-cause- There Was No Grid [.]

On Sep 7, 5:08*am, Bob Dobbs wrote:
RHFwrote:
On Sep 7, 4:06*am, Bob Dobbs wrote:
dave wrote:
We need some kind
of radio that'll work after the Great Collapse.

Why would anyone need some kind of working radio
to tune in all those stations (radios themselves) that won't be working?
Sort of a paradox, eh?
...or is it only receivers that will mysteriously stop working?

If enough of me survives any 'great collapse'
to be able to listen to something, I bet my radios will too.

--

Operator Bob
Echo Charlie 42

Sort of like a Farmer in the 1920s who bought a
"Farm Radio"; and when his Son asked him 'why'
the Farmer replied 'why' Son some day we will
have elect-tric-city just like your Uncle in the City.
http://everything2.com/title/Farm+radio

That article mentioned 45v or 90v "B" batteries,
yet I seem to remember a 67v one too
like my uncles used to menace me with.
- We had a long wire antenna running out the window to a walnut tree,
- always got disconnected during lightning storms
- and the end placed in a mason jar for insulation.

Was it 'filled' with "White Lightning" after the storm P


Actually so-called "Farm Radios" were usually
powered by Batteries and some/many Farms
had their own Electrical Generating Systems.
http://www.livinghistoryfarm.org/far...0s/life_18.htm

- They also talked about kerosene lanterns,
- which we called 'coal oil'.

-wrt- 'Coal Oil Johnny'

Note - Back then you could not go off-the-grid . . .
-cause- There WasNoGrid [.]

I didn't come on the scene until the early forties
and in town there was a grid of sorts.
Even a telephone system (number please)

--

Operator Bob
Echo Charlie 42