pinhead

try doing a search on information before doubting people
are you's two haunz's brothers
do a search for laser life
they do have a shelf life
i would't post it if it wasn't true
p.s dodge i have seen very few transport mechanism wear out
it usually always the laser

[ June 08, 2003, 08:13 PM: Message edited by: pinhead ]

fierce_gt

my understanding from home audio is that simple one disc tray loaded cd players generally last for 10+years without maintenance troubles. changers and that are not so great, but i would only assume that the in-car versions would be made pretty close to this standard. They take a lot more of a beating being driven around, but im pretty sure that a cd player is the most reliable thing they have made yet. that being said, i personally don't like RF units. seems to me that if you have to ask us, you don't trust this guy, i wouldn't buy anything from someone i don't trust. but that might not be the case here, i really don't know him, or you.

pinhead

High power laser diodes may have considerably shorter life expectancies than
the 5 mW variety - 10,000 hours or less.

And, high temperature operation can reduce life expectancy, possibly by as
much as a factor of 2 for each 10 °C rise above the temperature quoted
in the device's specifications. Thus, a laser diode with a quoted life of
10,000 hours at 25 °C, might only last 125 hours at 55 °C. Not
that it will actually fail at 125 hours and 1 second, but its maximum output
power will be reduced by 50 percent. I expect that there is a wide variation
on the extent to which this applies depending on device type, how close it is
operated to its specified maximum power, and all sorts of other factors.

Of course, in the grand scheme of things, even LEDs gradually lose brightness
with use.

(From: Gregory J. Whaley (gwhaley@tiny.net).)

There is one thing to keep in mind about laser diode lifetimes. The time to
failure probability distribution is quite wide, meaning that some laser's
lifetime will be significantly less than the 5,000 hour mean, and some will be
much, much longer than the mean. Lasers are not like light bulbs where they
"wear out" and have a predictable lifetime. The main life limiting factors in
a laser diode are related to how many crystal defects are present in the
device when it is made. If you are lucky to have a diode with very few
defects, then your laser may last nearly forever. If you are not so lucky, it
may only last a few hours.

pinhead

High power laser diodes may have considerably shorter life expectancies than
the 5 mW variety - 10,000 hours or less.

And, high temperature operation can reduce life expectancy, possibly by as
much as a factor of 2 for each 10 °C rise above the temperature quoted
in the device's specifications. Thus, a laser diode with a quoted life of
10,000 hours at 25 °C, might only last 125 hours at 55 °C. Not
that it will actually fail at 125 hours and 1 second, but its maximum output
power will be reduced by 50 percent. I expect that there is a wide variation
on the extent to which this applies depending on device type, how close it is
operated to its specified maximum power, and all sorts of other factors.

Of course, in the grand scheme of things, even LEDs gradually lose brightness
with use.
There is one thing to keep in mind about laser diode lifetimes. The time to
failure probability distribution is quite wide, meaning that some laser's
lifetime will be significantly less than the 5,000 hour mean, and some will be
much, much longer than the mean. Lasers are not like light bulbs where they
"wear out" and have a predictable lifetime. The main life limiting factors in
a laser diode are related to how many crystal defects are present in the
device when it is made. If you are lucky to have a diode with very few
defects, then your laser may last nearly forever. If you are not so lucky, it
may only last a few hours.


http://www.repairfaq.org/sam/laserdio.htm#dioldl0


did i read that right a lifetime or a few hours
let me quess one of you's knows how to tell that [img]graemlins/deal4u.gif[/img] [img]graemlins/deal4u.gif[/img] [img]graemlins/deal4u.gif[/img]

[ June 09, 2003, 05:23 PM: Message edited by: pinhead ]

Thumper89

It's not that I don't trust him,just I have never dealt with RF before..don't know the good points,bad points,etc....And don't know if it is a good deal...


I don't know.we will see.....I am sort of leaning towards this deal...Its a better deck as far as I know...

Thanks for your input! [img]graemlins/headbang.gif[/img]

Thumper89

The deck is a RFX 8230

Just found out...

So?.....what you think?

Orion_95

actually, since we are on the topic, delco made the rf decks, then fujitsu ten