IBOC
 

"Telamon" wrote in message
...

Antennas can have a broader response by increasing the diameter of the
vertical radiator. This can be done by running at least three wires
around the tower 120 degrees apart with a ring connecting them together
top and bottom minimum. This is much cheaper than constructing a larger
diameter tower. Increasing radiator diameter to broaden the response is
a general rule that can be applied to most antennas.

Check http://www.davidgleason.com/Argentin...ransmitter.htm
for shots of the skirt we put on Radio 10, a 100 kw AM on 710 in Buenos
Aires. In addition, the station intentionally directionalized to send a
bigger signal over Buenos Aires by putting a 1/4 wave passive tower to the
NE of the main half wave tower. The effect was to increase the field over
downtown (mostly apartments, like New York) and to become the only
listenable AM in the market inside major clusters of buildings.

The skirt seems to have given good bandwidth, and sounded very nice.

IBOC
 

Frank Dresser wrote:
During the time both stations were testing, there were times in which both
WBBM and WSCR were both running IBOC at the same time and times in which
they were running IBOC alternately. I didn't think about it much at the
time, but I now wonder if they were trying to get both IBOC channels
broadcasting off the same antenna.

I suppose that's possible, but http://www.fybush.com/site-010801.html
confirmed my memory that the two stations' transmitter/antenna sites are
fairly far apart.

--
If John McCain gets the 2008 Republican Presidential nomination,
my vote for President will be a write-in for Jiang Zemin.

IBOC
 

Dont Cry for Me,Argentina.And speaking of that,I sort of remember an
Argentina politics website that I think I accidently deleted from one of
my webtv user name thingys two or three days ago.

Where the deeppp, [where the deep] blue pearrrly waters, [blue pearly
waters] wash aponnn,[wash apon] [white silver sands] white silver
sandsssss.........
cuhulin

IBOC
 

"clifto" wrote in message
...

I suppose that's possible, but http://www.fybush.com/site-010801.html
confirmed my memory that the two stations' transmitter/antenna sites are
fairly far apart.


Yeah, but the IBOC off the same antenna idea is the closest I can come up
with for an explanation for the times in which WSCR and WBBM were
alternating IBOC broadcasts. The fact that WBBM is no longer broadcasting
IBOC sidebands suggests CBS has an experimental interest in IBOC rather than
a fully committed interest in The Radio of Tomorrow.

I sure wish I'd grabbed a portable and checked the directions in which the
broadcasts from WBBM, WSCR and their IBOC sidebands nulled out.

Speaking of nulls, there's one obvious problem with having a significant
distance between the analog broadcast antenna and the IBOC antenna. Some
IBOC radio owners would end up in areas in which the analog and broadcast
antennas are at right angles to each other. The IBOC sidebands might get
nulled out, and the High Defination Radio listener would get stuck with the
Lo-Fi'd downgraded IBOC-analog channel.

So, maybe they were not IBOCing the same tower. But I think it's possible
CBS could consolidate both broadcasters to the same site eventually. Save on
engineering costs, make a few bucks off the surplus real estate and reduce
the tax burden.

But I don't know. I do like to speculate.

Frank Dresser

IBOC
 

iboc SUCKS!
cuhulin

IBOC
 

In article ,
"David Eduardo" wrote:

"Telamon" wrote in message
...

Antennas can have a broader response by increasing the diameter of the
vertical radiator. This can be done by running at least three wires
around the tower 120 degrees apart with a ring connecting them together
top and bottom minimum. This is much cheaper than constructing a larger
diameter tower. Increasing radiator diameter to broaden the response is
a general rule that can be applied to most antennas.

Check http://www.davidgleason.com/Argentin...ransmitter.htm
for shots of the skirt we put on Radio 10, a 100 kw AM on 710 in Buenos
Aires. In addition, the station intentionally directionalized to send a
bigger signal over Buenos Aires by putting a 1/4 wave passive tower to the
NE of the main half wave tower. The effect was to increase the field over
downtown (mostly apartments, like New York) and to become the only
listenable AM in the market inside major clusters of buildings.

The skirt seems to have given good bandwidth, and sounded very nice.

Nice installation with near ideal earthing environment.

Good example of making the towers cross sectional area electrically
larger.

One reason the received audio is good is that besides being a well
engineered facility is the broader frequency response of the antenna
does not limit or phase distort the audio sidebands.

It must be very satisfying to build the matching device in the dog
house. You really have to pay attention to the physics of the capacitors
and inductors that makeup that device when it has to pass 100Kw.

--
Telamon
Ventura, California

IBOC
 

On Thu, 19 Jan 2006 21:55:01 GMT, Telamon
wrote:

Hey. You know anybody who wants a free tower. There's one up on
Wilson. 120' Self-supporter as I recall.

IBOC
 

In article ,
David wrote:

On Thu, 19 Jan 2006 21:55:01 GMT, Telamon
wrote:

Hey. You know anybody who wants a free tower. There's one up on
Wilson. 120' Self-supporter as I recall.

If I put something like that up my neighbors would likely organize a
lynching!

--
Telamon
Ventura, California