Conducting Bench Top Material
And now "they" are trying to do away with edison bulbs. I hope the LED equivalents are better, because the CF bulbs seem to last less in most home apps. (I have "standard" bulbs that have outlasted multiple CF bulbs in similar applications) In particular, I have a 75W desk lamp bulb which has been in use since '97 and gets more hours than the ceiling CFs in the same room, which have been replaced at least 3 times...
They are not enclosed or abused. I was really PO'd at the short life of my first set of CF lamps. They seem to be doing better now, but still there is no great enhanced life span.
Dave
----- Original Message -----
From: "Bill Hawkins" bill@iaxs.net
To: "Discussion of precise time and frequency measurement" time-nuts@febo.com
Sent: Thursday, January 28, 2010 2:28:31 AM GMT -07:00 US/Canada Mountain
Subject: Re: [time-nuts] Conducting Bench Top Material
Warning: Way OT
When the vacuum tube was born, there were half as many people on
this planet, and global climate change wasn't a problem. Very few
people will talk about populution. It's as if there was a blind
spot in the brain. Maybe there's no intelligent life in the
Universe because all life evolves with similar selection pressures.
Once technology removes natural predators (or stops world wars with
the atomic bomb), population heads for the sky until the big die-off.
If other people don't have a problem with having four kids, I have
no problem with using vacuum tubes and Edison bulbs.
All in my humble opinion, of course.
Bill Hawkins
-----Original Message-----
From: Rex
Sent: Wednesday, January 27, 2010 11:50 PM
Steve Rooke wrote:
Wasn't life so much easier with valves (tubes)...
Nostalgia?
Valves (tubes) warmer in close proximity, yes. Global warming should
make that, on average, less helpful.
........
glowing bulbs
Other than that memory, and certain trade-offs at big Rf power, I'll say
I no longer encourage the glowing bulbs for most things.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Hi
At least down here the CF lamps seem to run at least 2X and probably more than that compared to the old style bulbs. There are 20 of them in this room so that's a pretty good sample.
The big thing I notice is that the room does not self heat as much with 1/10th the power going into it. Right now a little self heating might be nice. Not so much so in the summer ....
The only issue I've seen is that they don't seem to like tightly enclosed fixtures very much. They seem to need a much lower temperature at the base than an old style bulb. In a can light, or most open fixtures that's not an problem. In some covered / enclosed celling fixtures they don't seem to get the cooling they need.
Bob
On Jan 29, 2010, at 2:32 AM, d.seiter@comcast.net wrote:
And now "they" are trying to do away with edison bulbs. I hope the LED equivalents are better, because the CF bulbs seem to last less in most home apps. (I have "standard" bulbs that have outlasted multiple CF bulbs in similar applications) In particular, I have a 75W desk lamp bulb which has been in use since '97 and gets more hours than the ceiling CFs in the same room, which have been replaced at least 3 times...
They are not enclosed or abused. I was really PO'd at the short life of my first set of CF lamps. They seem to be doing better now, but still there is no great enhanced life span.
Dave
----- Original Message -----
From: "Bill Hawkins" bill@iaxs.net
To: "Discussion of precise time and frequency measurement" time-nuts@febo.com
Sent: Thursday, January 28, 2010 2:28:31 AM GMT -07:00 US/Canada Mountain
Subject: Re: [time-nuts] Conducting Bench Top Material
Warning: Way OT
When the vacuum tube was born, there were half as many people on
this planet, and global climate change wasn't a problem. Very few
people will talk about populution. It's as if there was a blind
spot in the brain. Maybe there's no intelligent life in the
Universe because all life evolves with similar selection pressures.
Once technology removes natural predators (or stops world wars with
the atomic bomb), population heads for the sky until the big die-off.
If other people don't have a problem with having four kids, I have
no problem with using vacuum tubes and Edison bulbs.
All in my humble opinion, of course.
Bill Hawkins
-----Original Message-----
From: Rex
Sent: Wednesday, January 27, 2010 11:50 PM
Steve Rooke wrote:
Wasn't life so much easier with valves (tubes)...
Nostalgia?
Valves (tubes) warmer in close proximity, yes. Global warming should
make that, on average, less helpful.
........
glowing bulbs
Other than that memory, and certain trade-offs at big Rf power, I'll say
I no longer encourage the glowing bulbs for most things.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
In message 6755CB2A-9566-4F35-818E-38471BE6528F@cq.nu, Bob Camp writes:
And now "they" are trying to do away with edison bulbs. I hope
the LED equivalents are better, because the CF bulbs seem to last
less in most home apps.
Speaking of LED lamps: I want to point out that at least over here
IKEA has a wonderful little LED lamp for the worktable.
It's a single 3W white led, at the end of a 55cm long (that's 20" for
the imperialists amongst us) "swan-neck".
I use one for my small CNC-mill:
http://ing.dk/uploads/society/content/232.png
It's called "JAN SJÖ" here, not sure if they use that name in other
geographies.
Highly recommended.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
The most important thing to remember about CFLs is don't use them
anywhere that they will be turned on and off a lot (e.g. bathrooms).
Use them where they'll be turned on and left on. Short on / off cycles
can reduce their lifetime to 15% of normal. Here's a report on the
subject:
http://www.lrc.rpi.edu/nlpip/publicationDetails.asp?id=114&type=1
Ed
d.seiter@comcast.net wrote:
And now "they" are trying to do away with edison bulbs. I hope the LED equivalents are better, because the CF bulbs seem to last less in most home apps. (I have "standard" bulbs that have outlasted multiple CF bulbs in similar applications) In particular, I have a 75W desk lamp bulb which has been in use since '97 and gets more hours than the ceiling CFs in the same room, which have been replaced at least 3 times...
They are not enclosed or abused. I was really PO'd at the short life of my first set of CF lamps. They seem to be doing better now, but still there is no great enhanced life span.
Dave
----- Original Message -----
From: "Bill Hawkins" bill@iaxs.net
To: "Discussion of precise time and frequency measurement" time-nuts@febo.com
Sent: Thursday, January 28, 2010 2:28:31 AM GMT -07:00 US/Canada Mountain
Subject: Re: [time-nuts] Conducting Bench Top Material
Warning: Way OT
When the vacuum tube was born, there were half as many people on
this planet, and global climate change wasn't a problem. Very few
people will talk about populution. It's as if there was a blind
spot in the brain. Maybe there's no intelligent life in the
Universe because all life evolves with similar selection pressures.
Once technology removes natural predators (or stops world wars with
the atomic bomb), population heads for the sky until the big die-off.
If other people don't have a problem with having four kids, I have
no problem with using vacuum tubes and Edison bulbs.
All in my humble opinion, of course.
Bill Hawkins
-----Original Message-----
From: Rex
Sent: Wednesday, January 27, 2010 11:50 PM
Steve Rooke wrote:
Wasn't life so much easier with valves (tubes)...
Nostalgia?
Valves (tubes) warmer in close proximity, yes. Global warming should
make that, on average, less helpful.
........
glowing bulbs
Other than that memory, and certain trade-offs at big Rf power, I'll say
I no longer encourage the glowing bulbs for most things.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Hi Poul:
Can the base be hung on a wall?
http://www.ikea.com/us/en/catalog/products/10128734
Have Fun,
Brooke Clarke
http://www.PRC68.com
Poul-Henning Kamp wrote:
Speaking of LED lamps: I want to point out that at least over here
IKEA has a wonderful little LED lamp for the worktable.
It's a single 3W white led, at the end of a 55cm long (that's 20" for
the imperialists amongst us) "swan-neck".
I use one for my small CNC-mill:
http://ing.dk/uploads/society/content/232.png
It's called "JAN SJÖ" here, not sure if they use that name in other
geographies.
Highly recommended.
In message 4B631407.9090305@pacific.net, Brooke Clarke writes:
The base is a lump of metal
But the swan-neck is just screwed into the base (some assembly :-)
so if you are comfortable with cutting the wire and splicing it
again, you can mount it on anything you can drill a 10mm hole in...
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
Hi
But wouldn't cutting and splicing the wire void the warranty and possibly
thus lead to the end of civilization as we know it....
Where is the AC to DC conversion done? In a lot of these it's in the base.
Bob
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Poul-Henning Kamp
Sent: Friday, January 29, 2010 12:07 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] [OT] Ikea Lamp
In message 4B631407.9090305@pacific.net, Brooke Clarke writes:
The base is a lump of metal
But the swan-neck is just screwed into the base (some assembly :-)
so if you are comfortable with cutting the wire and splicing it
again, you can mount it on anything you can drill a 10mm hole in...
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
In message E580BC8AE64F443288DA889E7EA5CE17@vectron.com, "Bob Camp" writes:
Where is the AC to DC conversion done? In a lot of these it's in the base.
In the tiny wall-wart.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
I've heard you can salvage some good rectifiers and maybe a transistor or
two from dead CF bulbs.
Regards.
Max. K 4 O D S.
Email: max@maxsmusicplace.com
Transistor site http://www.funwithtransistors.net
Vacuum tube site: http://www.funwithtubes.net
Music site: http://www.maxsmusicplace.com
To subscribe to the fun with transistors group send an email to.
funwithtransistors-subscribe@yahoogroups.com
To subscribe to the fun with tubes group send an email to,
funwithtubes-subscribe@yahoogroups.com
----- Original Message -----
From: d.seiter@comcast.net
To: "Discussion of precise time and frequency measurement"
time-nuts@febo.com
Sent: Friday, January 29, 2010 1:32 AM
Subject: Re: [time-nuts] Conducting Bench Top Material
And now "they" are trying to do away with edison bulbs. I hope the LED
equivalents are better, because the CF bulbs seem to last less in most
home apps. (I have "standard" bulbs that have outlasted multiple CF bulbs
in similar applications) In particular, I have a 75W desk lamp bulb which
has been in use since '97 and gets more hours than the ceiling CFs in the
same room, which have been replaced at least 3 times...
They are not enclosed or abused. I was really PO'd at the short life of my
first set of CF lamps. They seem to be doing better now, but still there
is no great enhanced life span.
Dave
----- Original Message -----
From: "Bill Hawkins" bill@iaxs.net
To: "Discussion of precise time and frequency measurement"
time-nuts@febo.com
Sent: Thursday, January 28, 2010 2:28:31 AM GMT -07:00 US/Canada Mountain
Subject: Re: [time-nuts] Conducting Bench Top Material
Warning: Way OT
When the vacuum tube was born, there were half as many people on
this planet, and global climate change wasn't a problem. Very few
people will talk about populution. It's as if there was a blind
spot in the brain. Maybe there's no intelligent life in the
Universe because all life evolves with similar selection pressures.
Once technology removes natural predators (or stops world wars with
the atomic bomb), population heads for the sky until the big die-off.
If other people don't have a problem with having four kids, I have
no problem with using vacuum tubes and Edison bulbs.
All in my humble opinion, of course.
Bill Hawkins
-----Original Message-----
From: Rex
Sent: Wednesday, January 27, 2010 11:50 PM
Steve Rooke wrote:
Wasn't life so much easier with valves (tubes)...
Nostalgia?
Valves (tubes) warmer in close proximity, yes. Global warming should
make that, on average, less helpful.
........
glowing bulbs
Other than that memory, and certain trade-offs at big Rf power, I'll say
I no longer encourage the glowing bulbs for most things.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
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19:36:00
There are multiple versions, including wall-mount and one that clamps onto
the edge of an object like a bookshelf. Here is the family:
http://www.ikea.com/us/en/search/?query=jansjo
They all probably have the same LED head. If you don't need a long
gooseneck, the wall and clamp versions are the cheapest way to get the head
plus a short gooseneck. They give a circle of light with a fairly sharp
cutoff at the edge of the circle. Think of it as something that will fit
into many of the places where you would really like to have a fiber optic
light source, but at 1/5 the cost.
The little wall wart is a regulated constant-current supply (not constant
voltage), which ought to make the light output relatively constant despite
LED temperature changes and wire resistance changes. However, I find that
the cheap inline switch has contacts that tend to get dirty or oxidize, and
the LED flickers until I flip the switch on and off a couple of times to
clean the contacts. If you're going to modify it anyway, install a better
switch.
I have two of these. One clamp-base is mounted on my computer desk, up
high, where it illuminates my keyboard without washing out the monitor. The
other has the weighted desk base, and it's useful as a reading lamp as well
as illuminating things under the stereomicroscope, and looking inside
cluttered equipment chassis.
Dave
On Fri, Jan 29, 2010 at 8:59 AM, Brooke Clarke brooke@pacific.net wrote:
Hi Poul:
Can the base be hung on a wall?
http://www.ikea.com/us/en/catalog/products/10128734
Have Fun,
Brooke Clarke
http://www.PRC68.com