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CX2SA > SWL 17.03.05 06:19l 92 Lines 4001 Bytes #999 (0) @ WW
BID : 23951-CX2SA
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Subj: DX LISTENING DIG. 5-046 17/18
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CX2SA
Sent: 050317/0504Z @:CX2SA.LAV.URY.SA #:23951 [Minas] FBB7.00e $:23951-CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SWL@WW
Recent designs use an embedded metal film of tin oxide - thin enough
to be transparent - that can be electrically heated for defrosting,
said Eric Walton, a research scientist at Ohio State University whose
designs are used in some General Motors cars.
Carmakers also hide antennas behind plastic panels that will not block
signals, and in bumpers, parcel shelves, trunk lid trim, doors, under
dashboards and in roofs.
For its PT Cruiser convertible, Chrysler is experimenting with
antennas in the roll bar. Mercedes-Benz puts the antennas for its
keyless-entry system in the doors, center console, bumpers and
windows.
Antenna modules can also be concealed in outside mirrors, Dr.
Schumacher said. In a pinch, several antennas can be combined in one
compact housing.
Most of the new antenna types, Dr. Walton said, are "conformal"
antennas, which follow the contours of the car so that "the entire car
becomes the antenna." This design became possible only with the
availability of computers that could calculate antenna performance for
the curves of cars not yet built.
Properly aiming conformal and concealed antennas can be tricky. With
early windshield antennas, for example, "you'd turn a corner and the
station would disappear," Dr. Walton said, a problem solved by
installing window antennas on all sides of the car. "We have to deal
with the geometry the car designer gave us. Antenna engineers would
prefer shaping cars to be effective antennas, but those would be some
pretty funny-looking cars."
If the car's body panels are isolated from one another, they can be
pressed into service as multiple antennas for diversity reception.
Phase diversity systems, a design coming soon to some DaimlerChrysler
cars, add together the signals of several antennas to make them
stronger. These systems can also be configured to work like a single
antenna that electronically stays aimed squarely at the signal source,
even as the car turns.
The number of antennas aboard cars is expected to increase further
with the spread of wireless broadband services.
One maker of audio systems has proposed music downloads from home
computers to a car parked nearby, using a high-speed wireless
connection, and Mercedes-Benz has demonstrated a concept it calls
drive-by infofueling, in which navigation and information systems can
be updated at a toll booth or gasoline stop.
Will this forest of antennas doom the public to driving porcupines?
No, cars will maintain the sleekness of dolphins - designers and
carmakers prefer it that way. (via John Figliozzi, and Mike Terry,
dxldyg via DXLD)
ICOM R75 DISCONTINUED
Yes, it must be true! The ICOM R75 has been discontinued.
http://www.universal-radio.com/catalog/commrxvr/0175.html Availability
Note: Icom has discontinued the R75. No replacement is currently
planned. Universal Radio obtained a quantity of this model before it
was discontinued. We are pleased to be able continue to offer this
excellent radio (Steve Lare, Holland, MI USA, March 15, DX LISTENING
DIGEST)
R8B
The Drake site says limited availability. I dropped them an email for
verification. Website with specs http://www.rldrake.com/swl/R8B.html
(Powell E. Way, ABDX via DXLD)
DRAKE R8B AND ICOM IC-R75 NOW DISCONTINUED
:( If you want one of these new you'll have to hurry! before existing
stocks are gone As listed on Universal Radio site.
http://www.universal-radio.com/catalog/commrxvr/0082.html
http://www.universal-radio.com/catalog/commrxvr/0175.html
(John Schmiffy, March 16, ARDXC via DXLD)
HDD DVD --- Sorry, Howard Stern - Good-bye TIVO
Over the next ten to twenty years there will be a revolution in
broadcasting so drastic that I believe TV sets will virtually
disappear in American homes within the next 25 years. The in-home
AM/FM radio is already going the way of the 1950's short-wave, and
within 15 years will become a curiosity.
http://www.lewrockwell.com/rogers/rogers134.html
(via Andy Sennitt, dxldyg via DXLD)
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