On 2012-10-05, George Herold <gher...@teachspin.com> wrote:
> I've no problem with your marquee story. Sometimes folk-tales about
> rocks falling from the sky are correct.
> The data point I offer to Phil is that bulbs fail when you turn them
> on. I see no reason why that can't be 'played backwards'. There most
> be some GE, Philips, (other) report that documents turn on failure.
I recall a few yeas back someone had long-life bulbs with an NTC
series resistor built into the base.
Old toob tellys always had an NTC in series with the filament supply.
On 2012-10-05, Roderick Stewart <r...@escapetime.removethisbit.myzen.co.uk> wrote:
> In article <de99517e-e5e1-4f9d-91e0-
> 412ab3171...@o8g2000yqm.googlegroups.com>, George Herold wrote:
>> And that’s it. Repeated on and off means that the thin region has a
>> higher average temperature than the thick part of the filament. It
>> evaporates faster and fails sooner.
> Won't a thin region of a lamp filament have a higher temperature than > the rest of it all the time, not just when the lamp is turning on?
It will, but due to the thermal coefficient of resistance of tungsten
(most other metals are similar) the heating will be even greater when the filament heats from cold. The hot spot gains resistance faster, so it drops a greater voltage while the rest of the filament is still cold.
disclaimer: figures made up to illustrate the point
assume a constant-voltage supply compute the power disipated by he
thin spot (middle resistor) in each case
cold ----[100]---[1]---[100]---
hot ----[1000]-[12]-[1000]----
during warm-up thin spot warms up fastest.
start ---[200]---[3]---[200]---
yeah, it would be a good project for the mythbusters, I'd love to see
a slow motion film of an incandescent lamp failing at turn-on.
but could they affor do dedicate their fast camera for long enough.
> The Americans do seem generally to be used to sending a lot by courier > when we would just put in the post. Tending to happen in the UK also > even though the Royal Mail / Parcelforce often give a better service and > of course do not charge extra to send further. There has been a big > campaign in the North of Scotland about companies charging extra for > many postcode areas.
Digi-Key sent me (in NZ) a postcard by royal mail (from UK) the other day.
if it's still in the waste bassket on monday it'll check to see if it's a
preferred spelling thing (eg: "catalog" vs "catalogue") or perhaps it was
just cheaper to do it that way.
On 2012-10-06, Geoffrey S. Mendelson <g...@mendelson.com> wrote:
> Phil Hobbs wrote:
> Several years ago the USPS restructured their rates for mail outside of the
> US. They dropped surface mail, replacing it with an air mail system that
> takes almost as long. I have had packages take 6 weeks to arrive here airmail
> from the US.
> They did a survey of prices of the courier services, and simply charge 1/2
> of what the courier services do. If you want registered mail, they charge
> another $12 or so for it.
> Compare that to China which charges a few dollars to send a package, and > another dollar or so for registered mail. Or the UK (and the rest of the
> EU) that charge about $5 for postage and registered mail.
Chinas international mail is heavily subsided. <hearsay> I've heard that it's so heavilty subsidised that in some cases they pay the sender
</hearsay>. while doing the same in the USA would probably help small exporters (and therefore the balance of payments) I can't see the republican party getting behind subsidising a "state run monopoly".
John Fields wrote:
> On Sat, 06 Oct 2012 13:29:23 -0600, hw f <snuhw...@netscape.net>
> wrote:
>> Phil Hobbs wrote:
>>> On 10/06/2012 12:51 PM, hw f wrote:
>>>> Phil Hobbs wrote:
>>>>> [......]
>>>>> Stew Leonard's Espresso Roast, roasted fresh daily in sunny Yonkers.
>>>>> Best beans I've ever come across, and worth the trip. Always a crowd
>>>>> pleaser.
>>>>> Cheers
>>>>> Phil Hobbs
>>>> Sorry to hijack this thread but I have an actual electronics repair
>>>> question: how do I go about getting my old AIWA CX-NA10 stereo system to
>>>> read CD's again? Is the lazer bad? It detects the cd and spins up but
>>>> wont play it.
>>> You're no fun anymore.
>>> Cheers
>>> Phil Hobbs
>> Uh huh. I fixed it somewhat by fiddling with the screw behind the back >> cover. G00gle told me how. You lot are obviously quite useless.
>> <nods>
> ---
> Hardly surprising, since your query would have more appropriately been
> directed to sci.electronics.repair.
Gee, good thing this thread was never x-posted there, huh?
Jasen Betts wrote:
> Chinas international mail is heavily subsided. <hearsay> I've heard that > it's so heavilty subsidised that in some cases they pay the sender
></hearsay>. while doing the same in the USA would probably help small > exporters (and therefore the balance of payments) I can't see the > republican party getting behind subsidising a "state run monopoly".
Isn't the USPS already a state run monopoly which is subsidised?
Note that it says that the USPS has not DIRECTLY received taxpayer funds
since the 1980's.
Geoff.
-- Geoffrey S. Mendelson, N3OWJ/4X1GM/KBUH7245/KBUW5379
"Owning a smartphone: Technology's equivalent to learning to play
chopsticks on the piano as a child and thinking you're a musician."
(sent to me by a friend)
>John Fields wrote:
>> On Sat, 06 Oct 2012 13:29:23 -0600, §ñühwö£f <snuhw...@netscape.net>
>> wrote:
>>> Phil Hobbs wrote:
>>>> On 10/06/2012 12:51 PM, §ñühwö£f wrote:
>>>>> Phil Hobbs wrote:
>>>>>> [......]
>>>>>> Stew Leonard's Espresso Roast, roasted fresh daily in sunny Yonkers.
>>>>>> Best beans I've ever come across, and worth the trip. Always a crowd
>>>>>> pleaser.
>>>>>> Cheers
>>>>>> Phil Hobbs
>>>>> Sorry to hijack this thread but I have an actual electronics repair
>>>>> question: how do I go about getting my old AIWA CX-NA10 stereo system to
>>>>> read CD's again? Is the lazer bad? It detects the cd and spins up but
>>>>> wont play it.
>>>> You're no fun anymore.
>>>> Cheers
>>>> Phil Hobbs
>>> Uh huh. I fixed it somewhat by fiddling with the screw behind the back >>> cover. G00gle told me how. You lot are obviously quite useless.
>>> <nods>
>> ---
>> Hardly surprising, since your query would have more appropriately been
>> directed to sci.electronics.repair.
>Gee, good thing this thread was never x-posted there, huh?
><aside>
>Are all the regs of s.e.b this fucking retarded?
---
Since you chose to use 'this' instead of 'that', you've demonstrated
that you _are_ grammatically challenged, but not yet knowing the exact
level of your retardation, it's impossible to answer your question.
John Fields wrote:
> On Sat, 06 Oct 2012 18:36:06 -0600, hw f <snuhw...@netscape.net>
> wrote:
>> John Fields wrote:
>>> On Sat, 06 Oct 2012 13:29:23 -0600, hw f <snuhw...@netscape.net>
>>> wrote:
>>>> Phil Hobbs wrote:
>>>>> On 10/06/2012 12:51 PM, hw f wrote:
>>>>>> Phil Hobbs wrote:
>>>>>>> [......]
>>>>>>> Stew Leonard's Espresso Roast, roasted fresh daily in sunny Yonkers.
>>>>>>> Best beans I've ever come across, and worth the trip. Always a crowd
>>>>>>> pleaser.
>>>>>>> Cheers
>>>>>>> Phil Hobbs
>>>>>> Sorry to hijack this thread but I have an actual electronics repair
>>>>>> question: how do I go about getting my old AIWA CX-NA10 stereo system to
>>>>>> read CD's again? Is the lazer bad? It detects the cd and spins up but
>>>>>> wont play it.
>>>>> You're no fun anymore.
>>>>> Cheers
>>>>> Phil Hobbs
>>>> Uh huh. I fixed it somewhat by fiddling with the screw behind the back >>>> cover. G00gle told me how. You lot are obviously quite useless.
>>>> <nods>
>>> ---
>>> Hardly surprising, since your query would have more appropriately been
>>> directed to sci.electronics.repair.
>> Gee, good thing this thread was never x-posted there, huh?
>> <aside>
>> Are all the regs of s.e.b this fucking retarded?
> ---
> Since you chose to use 'this' instead of 'that', you've demonstrated
> that you _are_ grammatically challenged, but not yet knowing the exact
> level of your retardation, it's impossible to answer your question.
In article <slrnk711mn.97e....@cable.mendelson.com>,
Geoffrey S. Mendelson <g...@mendelson.com> wrote:
> It depends upon wat you consider a fair price and what you want people
> to do. If you want people from the US to NOT export cheap items then you
> keep your postal rates high.
That was the point I was trying to make. And it applies to not so cheap
items too.
-- *i souport publik edekashun.
Dave Plowman d...@davenoise.co.uk London SW
To e-mail, change noise into sound.
>John Fields wrote:
>> On Sat, 06 Oct 2012 18:36:06 -0600, §ñühwö£f <snuhw...@netscape.net>
>> wrote:
>>> John Fields wrote:
>>>> On Sat, 06 Oct 2012 13:29:23 -0600, §ñühwö£f <snuhw...@netscape.net>
>>>> wrote:
>>>>> Phil Hobbs wrote:
>>>>>> On 10/06/2012 12:51 PM, §ñühwö£f wrote:
>>>>>>> Phil Hobbs wrote:
>>>>>>>> [......]
>>>>>>>> Stew Leonard's Espresso Roast, roasted fresh daily in sunny Yonkers.
>>>>>>>> Best beans I've ever come across, and worth the trip. Always a crowd
>>>>>>>> pleaser.
>>>>>>>> Cheers
>>>>>>>> Phil Hobbs
>>>>>>> Sorry to hijack this thread but I have an actual electronics repair
>>>>>>> question: how do I go about getting my old AIWA CX-NA10 stereo system to
>>>>>>> read CD's again? Is the lazer bad? It detects the cd and spins up but
>>>>>>> wont play it.
>>>>>> You're no fun anymore.
>>>>>> Cheers
>>>>>> Phil Hobbs
>>>>> Uh huh. I fixed it somewhat by fiddling with the screw behind the back >>>>> cover. G00gle told me how. You lot are obviously quite useless.
>>>>> <nods>
>>>> ---
>>>> Hardly surprising, since your query would have more appropriately been
>>>> directed to sci.electronics.repair.
>>> Gee, good thing this thread was never x-posted there, huh?
>>> <aside>
>>> Are all the regs of s.e.b this fucking retarded?
>> ---
>> Since you chose to use 'this' instead of 'that', you've demonstrated
>> that you _are_ grammatically challenged, but not yet knowing the exact
>> level of your retardation, it's impossible to answer your question.
On 6 Oct 2012 23:31:51 GMT, Jasen Betts <ja...@xnet.co.nz> wrote:
>yeah, it would be a good project for the mythbusters, I'd love to see
>a slow motion film of an incandescent lamp failing at turn-on.
>but could they affor do dedicate their fast camera for long enough.
Due to the apparently lack of data and my curiosity, I was thinking of
throwing together a crude experiment. Two lamp bases, two 40 watt
clear envelope incandescent lamps, two SSS (solid state switches), and
some kind of pulse generator. 30 seconds on should be enough to get
the filament hot enough for sublimation. 30 seconds off should be
enough for it to cool down for a cold start (I need to check this with
an IR thermometer).
However, I have no intention of running this test for 1000+ hours.
Instead, an accelerated life test can be done with higher than normal
voltages.
<http://www.welchallyn.com/documents/Lighting/OEM_Halogen_Lighting/MC3...>
For halogen bulbs, they use:
Life = (Vdesign / Vapplied)^12.0 * Life at design voltage
For a 1000 hr lamp running at 120% of the rated voltage, the life
might be:
life = (1/1.2)^12 * 1000 = 112 hrs
which is more reasonable for my tinkering and for Mythbusters. With
power cycling, the life will be even less. I should have a Variac
somewhere in my junk pile.
> On 6 Oct 2012 23:31:51 GMT, Jasen Betts <ja...@xnet.co.nz> wrote:
> >yeah, it would be a good project for the mythbusters, I'd love to see
> >a slow motion film of an incandescent lamp failing at turn-on.
> >but could they affor do dedicate their fast camera for long enough.
> Due to the apparently lack of data and my curiosity, I was thinking of
> throwing together a crude experiment. Two lamp bases, two 40 watt
> clear envelope incandescent lamps, two SSS (solid state switches), and
> some kind of pulse generator. 30 seconds on should be enough to get
> the filament hot enough for sublimation. 30 seconds off should be
> enough for it to cool down for a cold start (I need to check this with
> an IR thermometer).
> However, I have no intention of running this test for 1000+ hours.
> Instead, an accelerated life test can be done with higher than normal
> voltages.
> <http://www.welchallyn.com/documents/Lighting/OEM_Halogen_Lighting/MC3...>
> For halogen bulbs, they use:
> Life = (Vdesign / Vapplied)^12.0 * Life at design voltage
> For a 1000 hr lamp running at 120% of the rated voltage, the life
> might be:
> life = (1/1.2)^12 * 1000 = 112 hrs
> which is more reasonable for my tinkering and for Mythbusters. With
> power cycling, the life will be even less. I should have a Variac
> somewhere in my junk pile.
Hi SEB. Well I sent an email to Don klipstein on this topic. And
have permission to copy his reply.
<from Don K. below>
My apologies - I have been off Usenet for a little over a year.
> Hi Don, I was wondering (out loud) if you still lurk on the
> sci.electronics.basic usernet forum?
> (So I figured I'd just drop you an email.)
> We have a question about the aging of incandescent bulbs from being
> turned on and off. You seem like quite a lamp expert and I was
> wondering if you've ever come across any real data on the subject.
As for real data on effect of switching causing wear on
incandescents:
I know some data.
1: It is true that incandescents often failon cold starts. However,
I
know a mechanism where an aging incandescent becomes unable to
survive
a cold start a little before it becomes unable to survive continuous
operation.
2: In incandescent traffic signals, the bulbs for yellow last longer
than
for red and green. So even after being switched on and off about a
million times, on-time is still a significant factor in life
expectancy.
However, traffic signal bulbs have a more vibration-resistant
filament
than standard incandescents.
3: Flashing and chasing marquee lights used to be incandescent until
cold cathode CFLs became economically available. Cold cathode CFLs
are special CFLs that are dimmable and blinkable, and flashing them
does not detract from their life. However, their efficiency is less
than that of hot cathode CFLs. Some marquees still use
incandescents.
4: I did an experiment to check for voltage drop in one of those
now-hard-to-get thermistor-type life-extending "buttons" to attach
to the tip of the base of an incandescent. The device claimed to
double the life of the bulb. I found enough voltage drop to account
for 50-60% life extension. Light output was reduced 13%, and power
consumption of the combo of the bulb and the thermistor was only
2.05%
less than that of a bulb connected directly to the line.
5: In my experience, incandescent holiday lights that blink last
longer
than those that don't. However, most of my experience is with low
voltage bulbs whose short filaments are probably sturdier.
6: Some incandescents make an audible "ping" when switched on.
However,
deflection of the filament does not necessarily strain the filament
past its "endurance limit" - the threshold of causing metal fatigue.
7: Some railroad crossing signals have a set-up where bulbs have a
resistor added in series with them for the first half second or so
that they are on. However, this may be done because of how serious
the problem is widely said to be, and how serious it actually is
appears
to me to be much less.
8: One of my friends had a bathroom fixture with a high wattage bulb
that
was constantly run dimmed by a dimmer. He experienced little gain
in
life extension. Since his bulbs significantly audibly buzzed, I
suspect
his filaments resonated at the power line frequency or one of the
power
line frequency's lower harmonics.
9: My mother had some incandescent nightlights that had diodes in
them
to significantly dim the bulbs - which should have made the bulbs
last
for decades. However, they did not.
One thing I noticed: These 4-watt bulbs had extremely thin
filaments,
and with a diode and therefore being off half the time 60 times a
second, their temperature varied greatly up and down 60 times a
second.
I could see that from rolling my eyes up-and-down while looking at
them.
Maybe the filaments at times resonated at the power line frequency
or
a lower harmonic thereof. That could easily produce sound too weak
to
hear from more than a couple inches away, because such low wattage
120V
incandescents have a vacuum rather than a gas fill.
Or, maybe those bulbs do not do well with DC due to high voltage,
vacuum, and the ends of the filament being close to each other.
Please see: http://donklipstein.com/bulb1.html#dc
======================
Overall, I am seeing generally that cold starts are not nearly as
bad as many say they are, but in a few bulbs they can be. The data
appears to me to be majority in favor of "little to generally no
problem from cold starts", but it is incomplete.
John Fields wrote:
> On Sun, 07 Oct 2012 10:42:06 -0600, hw f <snuhw...@netscape.net>
> wrote:
>> John Fields wrote:
>>> On Sat, 06 Oct 2012 18:36:06 -0600, hw f <snuhw...@netscape.net>
>>> wrote:
>>>> John Fields wrote:
>>>>> On Sat, 06 Oct 2012 13:29:23 -0600, hw f <snuhw...@netscape.net>
>>>>> wrote:
>>>>>> Phil Hobbs wrote:
>>>>>>> On 10/06/2012 12:51 PM, hw f wrote:
>>>>>>>> Phil Hobbs wrote:
>>>>>>>>> [......]
>>>>>>>>> Stew Leonard's Espresso Roast, roasted fresh daily in sunny Yonkers.
>>>>>>>>> Best beans I've ever come across, and worth the trip. Always a crowd
>>>>>>>>> pleaser.
>>>>>>>>> Cheers
>>>>>>>>> Phil Hobbs
>>>>>>>> Sorry to hijack this thread but I have an actual electronics repair
>>>>>>>> question: how do I go about getting my old AIWA CX-NA10 stereo system to
>>>>>>>> read CD's again? Is the lazer bad? It detects the cd and spins up but
>>>>>>>> wont play it.
>>>>>>> You're no fun anymore.
>>>>>>> Cheers
>>>>>>> Phil Hobbs
>>>>>> Uh huh. I fixed it somewhat by fiddling with the screw behind the back >>>>>> cover. G00gle told me how. You lot are obviously quite useless.
>>>>>> <nods>
>>>>> ---
>>>>> Hardly surprising, since your query would have more appropriately been
>>>>> directed to sci.electronics.repair.
>>>> Gee, good thing this thread was never x-posted there, huh?
>>>> <aside>
>>>> Are all the regs of s.e.b this fucking retarded?
>>> ---
>>> Since you chose to use 'this' instead of 'that', you've demonstrated
>>> that you _are_ grammatically challenged, but not yet knowing the exact
>>> level of your retardation, it's impossible to answer your question.
>John Fields wrote:
>> On Sun, 07 Oct 2012 10:42:06 -0600, §ñühwö£f <snuhw...@netscape.net>
>> wrote:
>>> John Fields wrote:
>>>> On Sat, 06 Oct 2012 18:36:06 -0600, §ñühwö£f <snuhw...@netscape.net>
>>>> wrote:
>>>>> John Fields wrote:
>>>>>> On Sat, 06 Oct 2012 13:29:23 -0600, §ñühwö£f <snuhw...@netscape.net>
>>>>>> wrote:
>>>>>>> Phil Hobbs wrote:
>>>>>>>> On 10/06/2012 12:51 PM, §ñühwö£f wrote:
>>>>>>>>> Phil Hobbs wrote:
>>>>>>>>>> [......]
>>>>>>>>>> Stew Leonard's Espresso Roast, roasted fresh daily in sunny Yonkers.
>>>>>>>>>> Best beans I've ever come across, and worth the trip. Always a crowd
>>>>>>>>>> pleaser.
>>>>>>>>>> Cheers
>>>>>>>>>> Phil Hobbs
>>>>>>>>> Sorry to hijack this thread but I have an actual electronics repair
>>>>>>>>> question: how do I go about getting my old AIWA CX-NA10 stereo system to
>>>>>>>>> read CD's again? Is the lazer bad? It detects the cd and spins up but
>>>>>>>>> wont play it.
>>>>>>>> You're no fun anymore.
>>>>>>>> Cheers
>>>>>>>> Phil Hobbs
>>>>>>> Uh huh. I fixed it somewhat by fiddling with the screw behind the back >>>>>>> cover. G00gle told me how. You lot are obviously quite useless.
>>>>>>> <nods>
>>>>>> ---
>>>>>> Hardly surprising, since your query would have more appropriately been
>>>>>> directed to sci.electronics.repair.
>>>>> Gee, good thing this thread was never x-posted there, huh?
>>>>> <aside>
>>>>> Are all the regs of s.e.b this fucking retarded?
>>>> ---
>>>> Since you chose to use 'this' instead of 'that', you've demonstrated
>>>> that you _are_ grammatically challenged, but not yet knowing the exact
>>>> level of your retardation, it's impossible to answer your question.
On Sat, 06 Oct 2012 10:51:47 -0600, hw f <snuhw...@netscape.net>
wrote:
>Phil Hobbs wrote:
>> [......]
>> Stew Leonard's Espresso Roast, roasted fresh daily in sunny Yonkers. >> Best beans I've ever come across, and worth the trip. Always a crowd >> pleaser.
>> Cheers
>> Phil Hobbs
>Sorry to hijack this thread but I have an actual electronics repair >question: how do I go about getting my old AIWA CX-NA10 stereo system to >read CD's again? Is the lazer bad? It detects the cd and spins up but >wont play it.
Have you taken it apart yet? Try cleaning the lens. In a dirty,
smoky or wet environment the lenses can become coated with stuff.
default wrote:
> On Sat, 06 Oct 2012 10:51:47 -0600, hw f <snuhw...@netscape.net>
> wrote:
>> Phil Hobbs wrote:
>>> [......]
>>> Stew Leonard's Espresso Roast, roasted fresh daily in sunny Yonkers. >>> Best beans I've ever come across, and worth the trip. Always a crowd >>> pleaser.
>>> Cheers
>>> Phil Hobbs
>> Sorry to hijack this thread but I have an actual electronics repair >> question: how do I go about getting my old AIWA CX-NA10 stereo system to >> read CD's again? Is the lazer bad? It detects the cd and spins up but >> wont play it.
> Have you taken it apart yet? Try cleaning the lens. In a dirty,
> smoky or wet environment the lenses can become coated with stuff.
I had it "working" a little after all that and an adjustment to the potentiometer on the back of the lazer as instructed. However it would only read one specific CD and scratched some CD's when it went thru its ejection cycle (disks would not spin down before ejection!) so I removed the tray and wont use it anymore. Further research indicated AIWA was part of a class action lawsuit in the 90's due to their CD players being crap. They're out of business now anyway. Good riddance.
On Mon, 8 Oct 2012 06:27:05 -0700 (PDT), George Herold
<gher...@teachspin.com> wrote:
>Hi SEB. Well I sent an email to Don klipstein on this topic. And
>have permission to copy his reply.
><from Don K. below>
>2: In incandescent traffic signals, the bulbs for yellow last >longer than for red and green. So even after being switched on >and off about a million times, on-time is still a significant >factor in life expectancy.
That means for my proposed test comparing a 50% duty cycle flashing
light bulb, with one that is on continuously, the continuous light
bulb will burn out first. That's the opposite of what I saw with the
theater marquee bulbs. Now, I'm really tempted to run the experiment.
> On Mon, 8 Oct 2012 06:27:05 -0700 (PDT), George Herold
> <gher...@teachspin.com> wrote:
> >Hi SEB. Well I sent an email to Don klipstein on this topic. And
> >have permission to copy his reply.
> ><from Don K. below>
> >2: In incandescent traffic signals, the bulbs for yellow last
> >longer than for red and green. So even after being switched on
> >and off about a million times, on-time is still a significant
> >factor in life expectancy.
> That means for my proposed test comparing a 50% duty cycle flashing
> light bulb, with one that is on continuously, the continuous light
> bulb will burn out first. That's the opposite of what I saw with the
> theater marquee bulbs. Now, I'm really tempted to run the experiment.
> default wrote:
>> On Sat, 06 Oct 2012 10:51:47 -0600, §ñühwö£f <snuhw...@netscape.net>
>> wrote:
>>> Phil Hobbs wrote:
>>>> [......]
>>>> Stew Leonard's Espresso Roast, roasted fresh daily in sunny Yonkers. >>>> Best beans I've ever come across, and worth the trip. Always a crowd >>>> pleaser.
>>>> Cheers
>>>> Phil Hobbs
>>> Sorry to hijack this thread but I have an actual electronics repair >>> question: how do I go about getting my old AIWA CX-NA10 stereo system to >>> read CD's again? Is the lazer bad? It detects the cd and spins up but >>> wont play it.
>> Have you taken it apart yet? Try cleaning the lens. In a dirty,
>> smoky or wet environment the lenses can become coated with stuff.
> I had it "working" a little after all that and an adjustment to the > potentiometer on the back of the lazer as instructed. However it would > only read one specific CD and scratched some CD's when it went thru its > ejection cycle (disks would not spin down before ejection!) so I removed > the tray and wont use it anymore. Further research indicated AIWA was part > of a class action lawsuit in the 90's due to their CD players being crap. > They're out of business now anyway. Good riddance.
Aiwa is still around as I understand it. They're owned by Sony.
The biggest problem with their 3-cd models was that so much dust would get into the lasers that even cleaning eventually would not be enough and the laser would need to be replaced.
By the way, the lasers were made by Sony, the same pickups used by many manufacturers at the time.
Worked on many of them, the customers were mostly satisfied.
Later models had sliding covers that covered up the laser lens when not playing. This helped but of course was not a perfect solution.
On Oct 10, 11:50 pm, Jeff Liebermann <je...@cruzio.com> wrote:
> On Mon, 8 Oct 2012 06:27:05 -0700 (PDT), George Herold
> <gher...@teachspin.com> wrote:
> >Hi SEB. Well I sent an email to Don klipstein on this topic. And
> >have permission to copy his reply.
> ><from Don K. below>
> >2: In incandescent traffic signals, the bulbs for yellow last
> >longer than for red and green. So even after being switched on
> >and off about a million times, on-time is still a significant
> >factor in life expectancy.
> That means for my proposed test comparing a 50% duty cycle flashing
> light bulb, with one that is on continuously, the continuous light
> bulb will burn out first. That's the opposite of what I saw with the
> theater marquee bulbs. Now, I'm really tempted to run the experiment.
Experiments can be very useful.
I'd worry most about how you turn on the bulbs.
Maybe just some simple relays?
1,000 hours isn't all that long. (or are you going to over-voltage
the bulbs?)
I guess I'd want at least 10 bulbs in each group. Say 60 watts.....
1200 kW-hrs.
That's looking like more money than I'd want to spend on the
electricity.
>> On Mon, 8 Oct 2012 06:27:05 -0700 (PDT), George Herold
>> <gher...@teachspin.com> wrote:
>> >Hi SEB. Well I sent an email to Don klipstein on this topic. And
>> >have permission to copy his reply.
>> ><from Don K. below>
>> >2: In incandescent traffic signals, the bulbs for yellow last
>> >longer than for red and green. So even after being switched on
>> >and off about a million times, on-time is still a significant
>> >factor in life expectancy.
>> That means for my proposed test comparing a 50% duty cycle flashing
>> light bulb, with one that is on continuously, the continuous light
>> bulb will burn out first. That's the opposite of what I saw with the
>> theater marquee bulbs. Now, I'm really tempted to run the experiment.
> Was there any vibration in that theater marquee?
That's a good point. Were there any bulbs continuously lit on the marquee to
use as a reference?
Mark Zacharias wrote:
> "§ñühwö£f" <snuhw...@netscape.net> wrote in message > news:k548cn$d53$1@dont-email.me...
>> default wrote:
>>> On Sat, 06 Oct 2012 10:51:47 -0600, §ñühwö£f <snuhw...@netscape.net>
>>> wrote:
>>>> Phil Hobbs wrote:
>>>>> [......]
>>>>> Stew Leonard's Espresso Roast, roasted fresh daily in sunny >>>>> Yonkers. Best beans I've ever come across, and worth the trip.
>>>>> Always a crowd pleaser.
>>>>> Cheers
>>>>> Phil Hobbs
>>>> Sorry to hijack this thread but I have an actual electronics repair >>>> question: how do I go about getting my old AIWA CX-NA10 stereo >>>> system to read CD's again? Is the lazer bad? It detects the cd and >>>> spins up but wont play it.
>>> Have you taken it apart yet? Try cleaning the lens. In a dirty,
>>> smoky or wet environment the lenses can become coated with stuff.
>> I had it "working" a little after all that and an adjustment to the >> potentiometer on the back of the lazer as instructed. However it would >> only read one specific CD and scratched some CD's when it went thru >> its ejection cycle (disks would not spin down before ejection!) so I >> removed the tray and wont use it anymore. Further research indicated >> AIWA was part of a class action lawsuit in the 90's due to their CD >> players being crap. They're out of business now anyway. Good riddance.
> Aiwa is still around as I understand it. They're owned by Sony.
I haven't seen any new kit from them in any stores for years. Sony bought them out and killed it off:
"Since 2004, however, Sony seemingly began rolling back its support for the Aiwa brand, and by 2005 Aiwa products remained on sale in only selected territories around the globe. In 2006, Aiwa products were discontinued and no longer sold in the market.
As of September 2011, the Aiwa website still existed to provide customer-support telephone numbers for some territories and regions, but it also contained many broken links and blank pages. In other regions, such as Europe, it redirected to a page on the Sony website stating that the Aiwa website had closed. The last apparent update to the website was in June 2008.[1]"
https://en.wikipedia.org/wiki/Aiwa
> The biggest problem with their 3-cd models was that so much dust would > get into the lasers that even cleaning eventually would not be enough > and the laser would need to be replaced.
> By the way, the lasers were made by Sony, the same pickups used by many > manufacturers at the time.
Wanna buy a used laser? Heh...its a 1997.
> Worked on many of them, the customers were mostly satisfied.
> Later models had sliding covers that covered up the laser lens when not > playing. This helped but of course was not a perfect solution.
> Mark Z.
We have another one, made in 2001, the tape decks on that one dont work. So, to recap: we have two units from failed electronics maker AIWA, and both have non-working components. My conclusion: AIWA was rightly killed off by Sony since its quality sucked balls.
Oh, but we also have a SHARP single CD unit from 1991, it works *perfectly*.
>> On Mon, 8 Oct 2012 06:27:05 -0700 (PDT), George Herold
>> <gher...@teachspin.com> wrote:
>> >Hi SEB. Well I sent an email to Don klipstein on this topic. And
>> >have permission to copy his reply.
>> ><from Don K. below>
>> >2: In incandescent traffic signals, the bulbs for yellow last
>> >longer than for red and green. So even after being switched on
>> >and off about a million times, on-time is still a significant
>> >factor in life expectancy.
>> That means for my proposed test comparing a 50% duty cycle flashing
>> light bulb, with one that is on continuously, the continuous light
>> bulb will burn out first. That's the opposite of what I saw with the
>> theater marquee bulbs. Now, I'm really tempted to run the experiment.
> Was there any vibration in that theater marquee?
Nope unless you count the movie audio pumped in from the theater
section as vibration.
The lobby and foyer lights were probably on a different circuit from
the marquee lights, which may have had different voltages, glitches,
surges, etc. I suspect that there were also some switching
transcients on the marquee side. That was 45 years ago, and I didn't
think to measure any of that. I just kept replacing light bulbs.
>On Thu, 11 Oct 2012 03:13:01 -0400, "Michael A. Terrell"
><mike.terr...@earthlink.net> wrote:
>>Jeff Liebermann wrote:
>>> On Mon, 8 Oct 2012 06:27:05 -0700 (PDT), George Herold
>>> <gher...@teachspin.com> wrote:
>>> >Hi SEB. Well I sent an email to Don klipstein on this topic. And
>>> >have permission to copy his reply.
>>> ><from Don K. below>
>>> >2: In incandescent traffic signals, the bulbs for yellow last
>>> >longer than for red and green. So even after being switched on
>>> >and off about a million times, on-time is still a significant
>>> >factor in life expectancy.
>>> That means for my proposed test comparing a 50% duty cycle flashing
>>> light bulb, with one that is on continuously, the continuous light
>>> bulb will burn out first. That's the opposite of what I saw with the
>>> theater marquee bulbs. Now, I'm really tempted to run the experiment.
>> Was there any vibration in that theater marquee?
>Nope unless you count the movie audio pumped in from the theater
>section as vibration.
>The lobby and foyer lights were probably on a different circuit from
>the marquee lights, which may have had different voltages, glitches,
>surges, etc. I suspect that there were also some switching
>transcients on the marquee side. That was 45 years ago, and I didn't
>think to measure any of that. I just kept replacing light bulbs.
I have a yet another guess(tm). I think the failures may have been
due to heating.
The lobby and foyer lights were mounted on the ceiling, pointing down.
One would think that there would be plenty of hot air accumulating
near the ceiling, but that wasn't the case. That's where the fan
ducts were located which helped to cool the lights. Few of those
lights ever burned out.
The marquee lamps were mounted on a vertical structure, with the lamps
pointed horizontally. I recall about 15-20 rows of lights. The
backing was some type of sheet metal and plywood sandwich possibly to
prevent the heat from the lights from setting fire to the building.
Near the top was about a 2ft overhang, which was mostly decorative,
but was also was used to hang flags and announcements. The rising hot
air from the lower lamps would accumulate under the overhand and
thoroughly heat the top rows of lights. Unfortunately, I didn't
notice which rows required the most lamp replacements.
One evening, I was volunteered to replace two lamps that had burned
out when the marquee was run for some occasion. I recall that the
sheet metal or plywood backing was warm near the bottom, but rather
hot near the top. This was about 10 minutes after the marquee was
turned off so that I could replace the bulbs. (That was also with a
line of people standing under the ladder, which was not very safe).
