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Car Forum / Toyota / Prius / September 2004

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Radio Quality

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Jim Michael - 14 Jul 2004 16:14 GMT
I just got a 2004 Prius Package 7.  The radio reception is terrible!
Has anyone else had this problem?  Jim
Michelle Vadeboncoeur - 15 Jul 2004 21:25 GMT
> I just got a 2004 Prius Package 7.  The radio reception is terrible!
> Has anyone else had this problem?  Jim

I assume that the dealer remembered to install the antenna before
delivering it to you?
Jim Michael - 16 Jul 2004 20:19 GMT
Yes - I screwed in the attenna a bit but found out the real culprit was the scanner.
It lands on frequencies it THINKS is the best.  In my case, I wanted 90.5FM.  The
scanner landed on 90.3FM and I ASSUMED that was correct.  Then I proceeded to blame
the reception.  I manually tuned to 90.5FM (PBS Classical in Tucson) and the signal
was clear as a bell!  Thanks for your response and beautiful name.  Jim

> > I just got a 2004 Prius Package 7.  The radio reception is terrible!
> > Has anyone else had this problem?  Jim
>
> I assume that the dealer remembered to install the antenna before
> delivering it to you?
der - 30 Jul 2004 03:07 GMT
> Yes - I screwed in the attenna a bit but found out the real culprit was the scanner.
> It lands on frequencies it THINKS is the best.  In my case, I wanted 90.5FM.  The
[quoted text clipped - 7 lines]
> > I assume that the dealer remembered to install the antenna before
> > delivering it to you?

Hmmm.  Sounds like AFC is a little too tight.  Does it do this at
higher frequencies or just the low ones?  If it does this at high
frequencies too you might want to mention this to the dealer.  You
didn't put in an after-market Sirius/XM satelite radio did you?  Yes
they have those for Prius (www.coastaletech.com/xm_radio_in_prius.htm)
but the internal antennae connection might have come loose.
Jim Michael - 01 Aug 2004 16:49 GMT
D:  I scanned, then manually tuned and preset all 6 spots with our favorite programs so
scanning will not be a problem in the future as the Tucson market is pretty small...but
I'm 70 and have enough problems elsewhere to worry about loose connections other than the
one in my defibrillator.

The radio is performing admirably.  Thanks for your considerate reply.  Jim

> > Yes - I screwed in the attenna a bit but found out the real culprit was the scanner.
> > It lands on frequencies it THINKS is the best.  In my case, I wanted 90.5FM.  The
[quoted text clipped - 14 lines]
> they have those for Prius (www.coastaletech.com/xm_radio_in_prius.htm)
> but the internal antennae connection might have come loose.
Watson A.Name - \ - 08 Sep 2004 11:39 GMT
> D:  I scanned, then manually tuned and preset all 6 spots with our favorite programs so
> scanning will not be a problem in the future as the Tucson market is pretty small...but
> I'm 70 and have enough problems elsewhere to worry about loose connections other than the
> one in my defibrillator.

Defibrillator?  You sure you don't mean pacemaker?  Only paramedics are
allowed to use defibrillators!  ;-)

BRRRZAP!!

> The radio is performing admirably.  Thanks for your considerate reply.  Jim

[snip]
Kevin Kirkeby - 08 Sep 2004 13:02 GMT
There is a device called an AICD (automated internal cardiac defibrillator)
that performs the same function as a paramedic's external defibrillator.
Since it's internal, it uses much lower energy level (10-25 watts/second)
versus 200-360 watts/second. Certain devices, like microwave ovens, radar
guns, and theft detectors/metal detectors are notorious for disturbing the
normal operation of AICD's and Pacemakers.

Kevin

"Watson A.Name - "Watt Sun, the Dark Remover"" <NOSPAM@dslextreme.com> wrote

>> D:  I scanned, then manually tuned and preset all 6 spots with our
> favorite programs so
[quoted text clipped - 13 lines]
>>
> [snip]
news.west.cox.net - 19 Sep 2004 05:30 GMT
I have had a Medtronic defibrillator ICD since 1996.

Watson A.Name - "Watt Sun, the Dark Remover" wrote:

>>D:  I scanned, then manually tuned and preset all 6 spots with our
>
[quoted text clipped - 20 lines]
>
> [snip]
Jay Hennigan - 31 Jul 2004 17:39 GMT
> I just got a 2004 Prius Package 7.  The radio reception is terrible!
> Has anyone else had this problem?  Jim

I find the reception in the package 9 to be outstanding.  FM sensitivity
is excellent, and AM sensitivity and selectivity is incredible.  There is
a local AM tower next to the freeway here in Santa Barbara that carries
three local stations at 1290, 1340, and 1490.  I can drive the freeway
past the tower and listen to 1450 in Ventura about 30 miles away without a
hint of interference.  Every other car I've driven has failed miserably in
this respect, with intermodulation and overload for about half a mile.  

I have had some issues with the CD changer occasionally giving a "Check"
message on some disks.  Selecting a different disk and coming back to the
failedone seems to fix it.  I'm going to try swapping the disks around to
see if it is the disk or the slot.  I use the random across all disks
setting which exercises the changer mechanism a lot more than listening to
a single disk at a time.
Watson A.Name - \ - 08 Sep 2004 11:35 GMT
> > I just got a 2004 Prius Package 7.  The radio reception is terrible!
> > Has anyone else had this problem?  Jim
[quoted text clipped - 6 lines]
> hint of interference.  Every other car I've driven has failed miserably in
> this respect, with intermodulation and overload for about half a mile.

I've never heard of one tower supporting multiple AM stations, because
the tower is the actual antenna; for more than one station, it means
they would have to have some kind of isolation between the two
transmitters to keep them from each other.  This leads me to beliwve
that maybe you're not really receiving that many stations on that tower.
Maybe you're getting interference from more than one station at that
location by intermodulation, where the station is acting like a local
oscillator in your radio, and causing it to receive two at the same
time.

> I have had some issues with the CD changer occasionally giving a "Check"
> message on some disks.  Selecting a different disk and coming back to the
> failedone seems to fix it.  I'm going to try swapping the disks around to
> see if it is the disk or the slot.  I use the random across all disks
> setting which exercises the changer mechanism a lot more than listening to
> a single disk at a time.
Jay Hennigan - 28 Sep 2004 01:25 GMT
On Wed, 08 Sep 2004 03:35:59 -0700, Watson A.Name - "Watt Sun, the Dark
Remover" wrote:

>> > I just got a 2004 Prius Package 7.  The radio reception is terrible!
>> > Has anyone else had this problem?  Jim
[quoted text clipped - 21 lines]
> oscillator in your radio, and causing it to receive two at the same
> time.

It is quite common.  Typically separate transmitters and a matching
circuit called a diplexer.  Another technique is a singler broadband
power amplifier being driven by separate exciters for the different
frequencies.  The matching circuits are somewhat complex as the antenna
itself will be off-resonance for at least some if not all of the
frequencies in use.

http://beradio.com/departments/radio_diplexing_am_transmitters/

http://www.crawfordbroadcasting.com/~cbc/Eng_Files/Practical%20Diplexing.pdf
 
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