Hi!

In many European contries we have DAB (DIGITAL) transmissions, mostly along
the main roads. I got my last car radio with DAB and also FM. You select a
station and there it is, whithout any fallouts or noise on the whole trip,
for instance from Oslo to Trondheim. Some entusiast complains about the
compression, it is like MP3, but most people find the quality sufficiently
good. If the DAB signal falls out, the FM takes over. It is also a very good
FM-receiver. I very often listen to a station sending only classical music.
Few FM stations relay that program, but with DAB you have it crystal clear
all the time!

Is something similar coming stateside?

Alf

"Bob D." skrev i melding
news:2rHad.113885$He1.9393@attbi_s01...
OEM car radios are pretty much state-of-the-art design. They always have
been. Today's models have ceramic IF filters, up conversion on AM, noise
blankers, audio DSP.... The next generation will have digital IF. For some
reason automakers have always been real picky about radio performance, and
willing to pay for it! (Been in the OEM automotive radio design biz for 30
years.)

Bob D.

"Steve Nosko" wrote in message
...
#1 reason is the Antenna. #2 cost is king!

Car = antenna on AM & FM

Home radio = Bar antenna on AM and ? what on FM... Sometimes it is the
power cord. Sometimes you have a wire to drape over the lamp shade.
The
aluminum backing on house insulation can provide some attenuation
effect,
but I'm sure this is less of a factor...it is the primarily the antenna.

Car radios on FM do not have exceptional selectivity as speculated
above.
The adjacent channel selectivity is only fair and the systems are made
to
only use alternate channels in any one market, anyway. When you're
between
markets and have a weak station 200 KHz away from a strong one that you
have
trouble. If "they" wanted better performance @ home is could be done,
just
costs $$. Low IF for reduced BW can be done in any radio, but size and
Q
and frequency are not independent, so lower freq IF means bigger coils
and
more "R", so "same Q - lower IF" is not that simple.


Did you hear about that guy who changed his name to "They". Interview
on
pub radio this weekend.



"Proctologically Violated©®" wrote in message
...
as compared to my home radios/stereos?

All--

Have wondered for years why this is so--almost w/o
exception,
on both AM/FM. On the car NGs, it was suggested that my house was
blocking
signals, and that the metallic car acted as a big antenna. Neither
seems
plausible, as my car next to the shop radio (which is terrible) still
gets
good reception, and that if the metal in a car were so good, you
wouldn't
need a car antenna.
I'm thinking it's the actual electronics. Any
opinions/explanations?
----------------------------
Mr. P.V.'d
formerly Droll Troll