Another reason to hate CFLs ...

[Meat Plow]

On Mon, 25 Oct 2010 09:30:16 -0700, Jeff Liebermann wrote:

On Mon, 25 Oct 2010 13:02:57 +0000 (UTC), Meat Plow <mhywatt@yahoo.com
wrote:

On Sun, 24 Oct 2010 21:14:32 -0700, Jeff Liebermann wrote:

Drivel: I was defrosting the fridge with a screwdriver and hammer,
when I managed to puncture the cooling coils, releasing the gas. I
hate days like this.

I've seen two office refrigerators end up in the trash because
secretaries thought they could use letter openers and a hammer to
carefully break the ice up. Why doesn't your unit have a timed defrost
on it like most home units do?

Nope. It's a small bar type 4 cu ft fridge. It doesn't even have a
light inside. My previous giant monster fridge had one of those
self-defrosting features. I disabled it when I discovered that a
substantial part of my monthly electric bill was dedicated to
defrosting. The water bed followed soon after.

Pain in the ass to defrost a side by side where the evaporator is hidden
behind plastic in the freezer. I know I've fixed a neighbor's 3 times
over the past ten years. It's got three heating elements in glass tubes
that corrode and break. Each time the evap was solid ice and probably
took as much power to thaw as it would if it was operating normally.



--
Live Fast, Die Young and Leave a Pretty Corpse

 

[Jeffrey Angus]

On 10/25/2010 11:25 AM, Jeff Liebermann wrote:

True. My understanding is that the reason for the vacuum pump cycle
is to prevent any refrigerant from escaping into the atmosphere.

Actually, it's to remove any non-refrigerant from the system prior to
filling it. Especially any moisture.

Jeff
The other other one

 

[nesesu]

On Oct 25, 4:43 am, "Brenda Ann" <newsgro...@fullspectrumradio.org>
wrote:

"William Sommerwerck" <grizzledgee...@comcast.net> wrote in message

news:ia3bqd$ktb$1@news.eternal-september.org...







Peter Wensberg, a vice-president at Polaroid, reported that Dr Land ran
the
entire book of color-perception charts past him, and said he was the first
person he'd met who failed every one. Whether this meant Mr Wensberg could
not see color at all, I don't know. But he couldn't /distinguish/ them
very
well.

A co-worker once asked me to help with selecting colors for a page he was
designing. It turned out he had red-green problems. I showed him a
fluorescent-green pen. "What color does that look like to you?" "Orange".
I
don't know what "orange" looked like to him, but he couldn't distinguish
that green from orange.

I have an hypothesis that I wish there were a way to explore.  Whereas a
given color of light (or what we call a color) is a definate wavelength, and
therefore a constant.... BUT.. is human perception of colors universal? ie
we know when we are seeing "red" (~650nm) because that's what we LEARNED to
call the color we see as red. Does this necessarily mean that we are all
perceiving the same hue, or do we each see something a bit different, but we
all call it the same thing?

As a totally out of the park example: let's say you and your friend are
looking at a stopsign. You both know that the sign is "red". But perhaps
what you see is more of an orange, whilst your friend sees something more
like yellow. As a subjective appearance, the difference in color perception
would be "normal" to the viewer, whereas were the two of you to "swap"
perceptions, the world around you would look quite strange.

It may sound like a very offbeat idea, but when you think about it, most
sensors have a skew in one direction or another: no two cameras register
color exactly the same.

Just another strange thought to ponder.. - Hide quoted text -

- Show quoted text -

Funny you should mention that Brenda Ann, I have wondered the exact
same thing for many years.

Neil S.

 

[N_Cook]

Jeff Liebermann <jeffl@cruzio.com> wrote in message
news:8no8c6pc1ep3atfd6fv2rt37t0of39ti7r@4ax.com...

On Sun, 24 Oct 2010 09:50:24 +0100, "N_Cook" <diverse@tcp.co.uk
wrote:

These days fibre reinforced plastic or mineralised plastic, used to be
ceramic in the original ones,

Reinforced Polybutylene Terephthalate (PBT) or Polyethylene
Terephthalate (PET) plastic resin with about 30% glass fiber mixed in
to minimally meet UL-94 V-0 flame retartent specs.

MSDS for CFL from Home Despot:

http://www.homedepot.com/catalog/pdfImages/fd/fd8f96e1-4ff3-4a86-9070-e8583

d3e636e.pdf>

Googling for BU102 + TO92 gets nowhere, I
assume as diac in there then triacs

What's inside and how it works:
"Self Oscillating 25W CFL Lamp Circuit"
http://www.nxp.com/documents/application_note/AN00048.pdf

Fiat Lux
(let there be light).

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Returning to that Philips application note
I can only find SOT533 version of BUJ101AU, eg
http://www.datasheetcatalog.org/datasheet/philips/BUJ101AU.pdf
a power transistor format rather than TO92 format with 1.5A/3A : 400V/700V
rating , perhaps for this specific use and known peak/av duty cycle then
could be packaged in TO92

 

[Tim Schwartz]

On 10/25/2010 10:10 AM, Geoffrey S. Mendelson wrote:

Tim Schwartz wrote:
I feel that the quoted lumens of the CFL's is for a 'young' bulb and
that the fall off is quite rapid. If I had to take a guess on my
hallway light, I would say that at 2000 hours the lamp was down to 40%
of its original output.

You might think that, but in many cases you would be wrong. When I recently
replaced a year old Osram brand CFL with another of the same wattage, I
noticed immediately it was much brighter.

Then I looked at the old lamp and the box for the new one. The old one was
rated 2/3s of the lumens of the new one.

So in this case, and will all of the osram lamps we bought that day (we bought
several in different sizes and wattages) they were much brighter by design than
the ones just a year old.

What I want to see is a long necked refrigerator bulb.

Geoff.

Geoff,

One point you missed about my comment on light output is that the lamps
were from the same package, bought on the same day. One of them just
sat on my shelf for a year.

Best regards,
Tim

 

[ChrisCoaster]

On Oct 24, 1:46 pm, David Sanders <sanders6...@bellsouth.net> wrote:

But can it grow superb colas?
--

- Show quoted text -
______________________

That will be fine! LOL