PRC as a amplifier in GPS question.

[Mark van der Eynden]

Arpit <DONTSPAMMEF00Lneko4@dodo.com.au> wrote in message news:<b4v8lvoh0rnni4kua44cl3jthc9q775k9c@4ax.com>...

Yeah, I remember reading in that magazine about how leds were a more
efficient light source than anything else.... sigh.

You can't blame that on SC.

I have read on the web (might try www.lumileds.com, sorry I haven't
saved the exact URLs) statements like this.

'Leds are currently more efficient than any other domestic lighting
and will, in the future, become more efficient than any other source
of lighting.'

and this

'Within 10 to 15 years all new domestic lighting will be Leds'

And after reading the other information at these sites you will go
away fairly convinced, I think.

Cheers,

Mark

 

[Terry Collins]

...snip......

But then again I only buy them every couple of months when
one blows (only got 2 in the house) so I guess I'm not a big user of
them.

Has anyone else noticed that halogen globes always seem to require your
hand in your pocket all the time? As far as I can see, the good old
"inefficent" incandescent globes are the "cheapest" (to my pocket) form
of lighting.

Here are my figures for cost of globe and electricity over the life of
the light. More comment below.


Incandescent 100W = $1 + 180 days * 6hrs * 100 watts
@ $0.109019/1000 = $12.78c/6months = $25.55 p.a.

Flourescent 30W = $18 + 365 days * 6hrs * 30 watts
@ $0.109019/1000 = $17.16 p.a. = $25.16 p.a.

Compact Fluro 20W = $20 + 365 days * 6hrs * 20 watts
@ $0.109019/1000 = $24.78 =$24.78 p.a.

Halogen Globes 50W@12V, use 55W for transformer effect = 2.75Watt @ 240v
= $10 + 122 days(4mths) * 6 hrs * 2.75 watts
@ $0.109019/1000 = $10.22 =$30.66 p.a.

The first figure is my cost to buy a globe.
The second is my experience with life of each type of globe.
The 6hrs is an annual average of the hours/day I run main room lights
The Watts is the relative power use per globe.
The $0.109019 cents per KWHr on my electricity bill.

It seems to me that the total picture is worse as the "fitting" for each
type of light is more expensive as you go down the list.



--
Terry Collins {}}} email: terryc at woa.com.au www:
http://www.woa.com.au
Wombat Outdoor Adventures <Bicycles, Computers, GIS, Printing,
Publishing>

"People without trees are like fish without clean water"

 

[Ralph]

Worse still are the 40w "candle" shaped globes used in multiple globe light
fittings. I have 2 x 3 globe fittings and replace roughly one a month.

--
remove n u m b e r s to reply
Terry Collins wrote in message <3F55284F.6DBEBEEA@woa.com.au>...

..snip......

But then again I only buy them every couple of months when
one blows (only got 2 in the house) so I guess I'm not a big user of
them.

Has anyone else noticed that halogen globes always seem to require your
hand in your pocket all the time? As far as I can see, the good old
"inefficent" incandescent globes are the "cheapest" (to my pocket) form
of lighting.

Here are my figures for cost of globe and electricity over the life of
the light. More comment below.


Incandescent 100W = $1 + 180 days * 6hrs * 100 watts
@ $0.109019/1000 = $12.78c/6months = $25.55 p.a.

Flourescent 30W = $18 + 365 days * 6hrs * 30 watts
@ $0.109019/1000 = $17.16 p.a. = $25.16 p.a.

Compact Fluro 20W = $20 + 365 days * 6hrs * 20 watts
@ $0.109019/1000 = $24.78 =$24.78 p.a.

Halogen Globes 50W@12V, use 55W for transformer effect = 2.75Watt @ 240v
= $10 + 122 days(4mths) * 6 hrs * 2.75 watts
@ $0.109019/1000 = $10.22 =$30.66 p.a.

The first figure is my cost to buy a globe.
The second is my experience with life of each type of globe.
The 6hrs is an annual average of the hours/day I run main room lights
The Watts is the relative power use per globe.
The $0.109019 cents per KWHr on my electricity bill.

It seems to me that the total picture is worse as the "fitting" for each
type of light is more expensive as you go down the list.



--
Terry Collins {}}} email: terryc at woa.com.au www:
http://www.woa.com.au
Wombat Outdoor Adventures <Bicycles, Computers, GIS, Printing,
Publishing

"People without trees are like fish without clean water"

 

[Russ]

"Terry Collins" <terryc@woa.com.au> wrote in message
news:3F55284F.6DBEBEEA@woa.com.au...

..snip......

But then again I only buy them every couple of months when
one blows (only got 2 in the house) so I guess I'm not a big user of
them.

Has anyone else noticed that halogen globes always seem to require your
hand in your pocket all the time? As far as I can see, the good old
"inefficent" incandescent globes are the "cheapest" (to my pocket) form
of lighting.

Here are my figures for cost of globe and electricity over the life of
the light. More comment below.


Incandescent 100W = $1 + 180 days * 6hrs * 100 watts
@ $0.109019/1000 = $12.78c/6months = $25.55 p.a.

Flourescent 30W = $18 + 365 days * 6hrs * 30 watts
@ $0.109019/1000 = $17.16 p.a. = $25.16 p.a.

Compact Fluro 20W = $20 + 365 days * 6hrs * 20 watts
@ $0.109019/1000 = $24.78 =$24.78 p.a.

Halogen Globes 50W@12V, use 55W for transformer effect = 2.75Watt @ 240v
= $10 + 122 days(4mths) * 6 hrs * 2.75 watts
@ $0.109019/1000 = $10.22 =$30.66 p.a.

The first figure is my cost to buy a globe.
The second is my experience with life of each type of globe.
The 6hrs is an annual average of the hours/day I run main room lights
The Watts is the relative power use per globe.
The $0.109019 cents per KWHr on my electricity bill.

While I can't argue with what you've observed with Halogens, in my
experience their life is measured in years - I have about 20 in my house,
and the office where I used to work had about 70 - in the case of the
office, the lights were installed in 1999 and the odd one started to be
replaced in late 2001. The majority of bulbs failing in 2002. These bulbs
run around 10 hours a day, 5 days a week. The lifespan of those in my house
is similar.

Quality halogen bulbs are rated at 4,000 hours of operation, not 732 like
you are getting.

It may be that yours are poorly installed, or the transformer is faulty.

As for cost, $5 seems to be the going rate for bulbs where I am.

So for what its worth, using the lower end of my observations I get
500 (2 years, 50 weeks a year, 5 days a week) * 6hrs = 3000hrs * 55 watts
@ $0.109019/1000 = $17.98 + $5 = $11.49pa

In this scenario, the significant cost is the power consumption, not the
bulb.

Russ.

 

[Rod Speed]

Terry Collins <terryc@woa.com.au> wrote in
message news:3F55284F.6DBEBEEA@woa.com.au...

But then again I only buy them every couple
of months when one blows (only got 2 in the
house) so I guess I'm not a big user of them.

Has anyone else noticed that halogen globes always
seem to require your hand in your pocket all the time?

Depends on where you use them. I only use a desklamp
with one in it, hardly ever have that on, bulb lasts forever.
Havent ever replaced it in what must be 10 years or so.

As far as I can see, the good old "inefficent" incandescent
globes are the "cheapest" (to my pocket) form of lighting.

Really depends on the detail of how its used.

And its not very aesthetically appealing in quite a few situations too.

I prefer the big PAR 38 edison screw bulbs for the main lighting
at night. The bulbs arent that cheap but last a year or so with daily
use. Can be a bit warm in the stinking hot weather at night tho.

Here are my figures for cost of globe and electricity
over the life of the light. More comment below.

Incandescent 100W = $1 + 180 days * 6hrs * 100 watts
@ $0.109019/1000 = $12.78c/6months = $25.55 p.a.

Flourescent 30W = $18 + 365 days * 6hrs * 30 watts
@ $0.109019/1000 = $17.16 p.a. = $25.16 p.a.

Thats pretty bogus on the $18. While it does cost that
much to start with, it lasts a hell of a lot longer than a year.

Not very aesthetically appealing light tho regardless of price.

Compact Fluro 20W = $20 + 365 days * 6hrs * 20 watts
@ $0.109019/1000 = $24.78 =$24.78 p.a.

Gave up on those, stupidly short life for the price.

Halogen Globes 50W@12V, use 55W for transformer effect = 2.75Watt @ 240v
= $10 + 122 days(4mths) * 6 hrs * 2.75 watts
@ $0.109019/1000 = $10.22 =$30.66 p.a.

The first figure is my cost to buy a globe.

Surely that isnt right with long tube fluoros.
http://www.homeshop.com.au/category.asp?catalog%5Fname=hs1378&category%5Fname=F120283&Page=1

The second is my experience with life of each type of globe.

You should be getting a lot longer than a year with a long tube fluoro.

The 6hrs is an annual average of the hours/day I run main room lights
The Watts is the relative power use per globe.
The $0.109019 cents per KWHr on my electricity bill.

It seems to me that the total picture is worse as the "fitting" for
each type of light is more expensive as you go down the list.

True. But thats a pretty minor consideration.

 

[budgie]

On 2 Sep 2003 15:15:55 -0700, mvandere@iprimus.com.au (Mark van der
Eynden) wrote:

Arpit <DONTSPAMMEF00Lneko4@dodo.com.au> wrote in message news:<b4v8lvoh0rnni4kua44cl3jthc9q775k9c@4ax.com>...
Yeah, I remember reading in that magazine about how leds were a more
efficient light source than anything else.... sigh.

You can't blame that on SC.

I have read on the web (might try www.lumileds.com, sorry I haven't
saved the exact URLs) statements like this.

'Leds are currently more efficient than any other domestic lighting
and will, in the future, become more efficient than any other source
of lighting.'

and this

'Within 10 to 15 years all new domestic lighting will be Leds'

Sounds similar to those other classics:

By 1990 no aussie child will live in poverty (presume that means
they'll all die there)

640K (RAM - or was it 10MB HDD) is all a computer will ever need -
from he whose bloatware resulted in the Moore's Law denial: "what
Intel giveth, Microsoft taketh away"

And after reading the other information at these sites you will go
away fairly convinced, I think.

Only if you believe spin doctors.

 

[Terry Collins]

Russ wrote:

While I can't argue with what you've observed with Halogens, in my
experience their life is measured in years - I have about 20 in my house,
and the office where I used to work had about 70 - in the case of the
office, the lights were installed in 1999 and the odd one started to be
replaced in late 2001. The majority of bulbs failing in 2002. These bulbs
run around 10 hours a day, 5 days a week. The lifespan of those in my house
is similar.

Brand and Model?

My experience with halogens was a similar office setting where for 2
years there was monthly replacement of at least one of 12 halogen lights
above an enquiry counter. It convinced me never to use them at home.

--
Terry Collins {}}} email: terryc at woa.com.au www:
http://www.woa.com.au
Wombat Outdoor Adventures <Bicycles, Computers, GIS, Printing,
Publishing>

"People without trees are like fish without clean water"

 

[Terry Collins]

Rod Speed wrote:

Thats pretty bogus on the $18. While it does cost that
much to start with, it lasts a hell of a lot longer than a year.

The $18 was the only figure I had to hand (docket from lighting shop for
a replacement round), so I expected someone else to come up with a
different figure as I don't purchase them that often.

--
Terry Collins {}}} email: terryc at woa.com.au www:
http://www.woa.com.au
Wombat Outdoor Adventures <Bicycles, Computers, GIS, Printing,
Publishing>

"People without trees are like fish without clean water"

 

[Phil Allison]

"Terry Collins" <terryc@woa.com.au> wrote in message
news:3F555023.3A7048CA@woa.com.au...

Rod Speed wrote:

Thats pretty bogus on the $18. While it does cost that
much to start with, it lasts a hell of a lot longer than a year.

The $18 was the only figure I had to hand (docket from lighting shop for
a replacement round),

** Round flouros are heaps more expensive and not long lasters either,
talk about picking an example to suit a phoney case !!




.................... Phil

 

[Mark van der Eynden]

Terry Collins <terryc@woa.com.au> wrote in message news:<3F55284F.6DBEBEEA@woa.com.au>...

..snip......

But then again I only buy them every couple of months when
one blows (only got 2 in the house) so I guess I'm not a big user of
them.

Has anyone else noticed that halogen globes always seem to require your
hand in your pocket all the time? As far as I can see, the good old
"inefficent" incandescent globes are the "cheapest" (to my pocket) form
of lighting.

In my case the two lights are in the bathroom, hence they are get
about 6 cycles a day of about 1/2 an hour each.

So they probably get too many hot/cold cycles to last their 'normal'
life expectancy. We generally use GE or Philips globes so we're not
using cheapies.

Mark

 

[Terry Collins]

Phil Allison wrote:

** Round flouros are heaps more expensive and not long lasters either,
talk about picking an example to suit a phoney case !!

................... Phil

And your example is ????

 

[Phil Allison]

"Terry Collins" <terryc@woa.com.au> wrote in message
news:3F557A53.9E458B6A@woa.com.au...

Phil Allison wrote:

** Round flouros are heaps more expensive and not long lasters
either,
talk about picking an example to suit a phoney case !!

................... Phil

And your example is ????

** How about straight 36 watt, triphosphor flouros for $8 each.

12,000 + hours, still going OK.




.............. Phil

 

[Russ]

"Terry Collins" <terryc@woa.com.au> wrote in message
news:3F554E7E.984FCA0D@woa.com.au...

Russ wrote:


While I can't argue with what you've observed with Halogens, in my
experience their life is measured in years - I have about 20 in my
house,
and the office where I used to work had about 70 - in the case of the
office, the lights were installed in 1999 and the odd one started to be
replaced in late 2001. The majority of bulbs failing in 2002. These
bulbs
run around 10 hours a day, 5 days a week. The lifespan of those in my
house
is similar.

Brand and Model?

My experience with halogens was a similar office setting where for 2
years there was monthly replacement of at least one of 12 halogen lights
above an enquiry counter. It convinced me never to use them at home.

I'm pretty sure the first batch of lights I ordered for the new office came
with GE bulbs, however I've also used cheap 'n nasty globes from Jaycar that
have still had an impressive life.

The only situation where I've had a bulb fail in a short period (~8 months)
was a 20w dichroic in a garden light. In that case I think it was due to low
voltage, although I haven't checked.

If you are having premature bulb failures, I'd check the voltage at the
light under load - the chances are that's causing your problem.

Incidentally, we did have a problem with the halogens in the office,
particularly in winter, the odd light would start to switch on and off at
intervals of about 20 minutes. It turned out the insulated aircon ducting
was covering the transformer, causing it to overheat and trigger the thermal
cutout. Thank god they had that protection...

Russ.

 

[Arpit]

Thats just wrong. Fluorescent lighting is MUCH more efficient. If you
want I can get you figures. Even more efficient than that is low
pressure sodium vapour lighting, but for obvious reasons its
impracticle for household use.
Coloured leds are more efficient than wwhite leds, but if you argue
they can be used, I'll argue by the same token you can use soddium
vapourl lighting. Standard white leds are about as efficient as
halogen globes.


On 2 Sep 2003 15:15:55 -0700, mvandere@iprimus.com.au (Mark van der
Eynden) wrote:

Arpit <DONTSPAMMEF00Lneko4@dodo.com.au> wrote in message news:<b4v8lvoh0rnni4kua44cl3jthc9q775k9c@4ax.com>...
Yeah, I remember reading in that magazine about how leds were a more
efficient light source than anything else.... sigh.

You can't blame that on SC.

I have read on the web (might try www.lumileds.com, sorry I haven't
saved the exact URLs) statements like this.

'Leds are currently more efficient than any other domestic lighting
and will, in the future, become more efficient than any other source
of lighting.'

and this

'Within 10 to 15 years all new domestic lighting will be Leds'

And after reading the other information at these sites you will go
away fairly convinced, I think.

Cheers,

Mark

 

[Arpit]

On Wed, 3 Sep 2003 10:35:20 +1000, "Rod Speed" <rod_speed@yahoo.com>
wrote:

Terry Collins <terryc@woa.com.au> wrote in
message news:3F55284F.6DBEBEEA@woa.com.au...

But then again I only buy them every couple
of months when one blows (only got 2 in the
house) so I guess I'm not a big user of them.

Has anyone else noticed that halogen globes always
seem to require your hand in your pocket all the time?

Depends on where you use them. I only use a desklamp
with one in it, hardly ever have that on, bulb lasts forever.
Havent ever replaced it in what must be 10 years or so.

As far as I can see, the good old "inefficent" incandescent
globes are the "cheapest" (to my pocket) form of lighting.

Really depends on the detail of how its used.

And its not very aesthetically appealing in quite a few situations too.

I prefer the big PAR 38 edison screw bulbs for the main lighting
at night. The bulbs arent that cheap but last a year or so with daily
use. Can be a bit warm in the stinking hot weather at night tho.

Here are my figures for cost of globe and electricity
over the life of the light. More comment below.

Incandescent 100W = $1 + 180 days * 6hrs * 100 watts
@ $0.109019/1000 = $12.78c/6months = $25.55 p.a.

Flourescent 30W = $18 + 365 days * 6hrs * 30 watts
@ $0.109019/1000 = $17.16 p.a. = $25.16 p.a.

Thats pretty bogus on the $18. While it does cost that
much to start with, it lasts a hell of a lot longer than a year.

Yep, and if you don't switch them, theyll go on lasting, and

lasting..... Look at some of the fat ones you see in train stations,
haven't seen those sold for years.

Not very aesthetically appealing light tho regardless of price.

Compact Fluro 20W = $20 + 365 days * 6hrs * 20 watts
@ $0.109019/1000 = $24.78 =$24.78 p.a.

Gave up on those, stupidly short life for the price.

Halogen Globes 50W@12V, use 55W for transformer effect = 2.75Watt @ 240v
= $10 + 122 days(4mths) * 6 hrs * 2.75 watts
@ $0.109019/1000 = $10.22 =$30.66 p.a.

The first figure is my cost to buy a globe.

Surely that isnt right with long tube fluoros.
http://www.homeshop.com.au/category.asp?catalog%5Fname=hs1378&category%5Fname=F120283&Page=1

The second is my experience with life of each type of globe.

You should be getting a lot longer than a year with a long tube fluoro.

The 6hrs is an annual average of the hours/day I run main room lights
The Watts is the relative power use per globe.
The $0.109019 cents per KWHr on my electricity bill.

It seems to me that the total picture is worse as the "fitting" for
each type of light is more expensive as you go down the list.

True. But thats a pretty minor consideration.

 

[Arpit]

I like the halogens cause they are so durable. I use a 50 watt
dichroic one for a bike light, and I usually ride off road.

On Wed, 3 Sep 2003 15:34:48 +1000, "Russ" <russell@thehovel.net>
wrote:

"Terry Collins" <terryc@woa.com.au> wrote in message
news:3F554E7E.984FCA0D@woa.com.au...
Russ wrote:


While I can't argue with what you've observed with Halogens, in my
experience their life is measured in years - I have about 20 in my
house,
and the office where I used to work had about 70 - in the case of the
office, the lights were installed in 1999 and the odd one started to be
replaced in late 2001. The majority of bulbs failing in 2002. These
bulbs
run around 10 hours a day, 5 days a week. The lifespan of those in my
house
is similar.

Brand and Model?

My experience with halogens was a similar office setting where for 2
years there was monthly replacement of at least one of 12 halogen lights
above an enquiry counter. It convinced me never to use them at home.

I'm pretty sure the first batch of lights I ordered for the new office came
with GE bulbs, however I've also used cheap 'n nasty globes from Jaycar that
have still had an impressive life.

The only situation where I've had a bulb fail in a short period (~8 months)
was a 20w dichroic in a garden light. In that case I think it was due to low
voltage, although I haven't checked.

If you are having premature bulb failures, I'd check the voltage at the
light under load - the chances are that's causing your problem.

Incidentally, we did have a problem with the halogens in the office,
particularly in winter, the odd light would start to switch on and off at
intervals of about 20 minutes. It turned out the insulated aircon ducting
was covering the transformer, causing it to overheat and trigger the thermal
cutout. Thank god they had that protection...

Russ.

 

[Terry Collins]

Arpit wrote:

I like the halogens cause they are so durable. I use a 50 watt
dichroic one for a bike light, and I usually ride off road.

Oh dear, we will be thought of as nut cases {.
My high beam is a 50Watt halogen (for busy roads and lots of neon in the
background). My low beam/standard is 20Watt, with twin 20Watts offset
for bush tracks.

--
Terry Collins {}}} email: terryc at woa.com.au www:
http://www.woa.com.au
Wombat Outdoor Adventures <Bicycles, Computers, GIS, Printing,
Publishing>

"People without trees are like fish without clean water"

 

[Terry Collins]

Russ wrote:

....snip.....

I'm pretty sure the first batch of lights I ordered for the new office came
with GE bulbs, however I've also used cheap 'n nasty globes from Jaycar that
have still had an impressive life.

Well, that is nice to know as I have about 50 of various models from
Jaycar. I was wondering if their cheap price was going to be a not so
good price as testing showed variations in brightness.

The only situation where I've had a bulb fail in a short period (~8 months)
was a 20w dichroic in a garden light. In that case I think it was due to low
voltage, although I haven't checked.

If you are having premature bulb failures, I'd check the voltage at the
light under load - the chances are that's causing your problem.

I will keep this info in mind when next I encounter a similar
situation. Thanks.

--
Terry Collins {}}} email: terryc at woa.com.au www:
http://www.woa.com.au
Wombat Outdoor Adventures <Bicycles, Computers, GIS, Printing,
Publishing>

"People without trees are like fish without clean water"

 

[Philip Terrill]

If your anywhere near brisbane, theres a tip shop at redland bay (called
redlands recycland). they get bucket loads of old stoves etc- you almost
certainly be able to pick up an old heating element from there for around
$2.00 or less. Hundreds get thrown in the bin every week.

cheers,

Phil Terrill


"K Dog" <kd@dontspamme.com> wrote in message
news:fLh4b.74529$bo1.6411@news-server.bigpond.net.au...

Hi,

Where does one purchase a 600w element? Preferrably a spiral element,
which
can have a fan next to it to blow the hot air through?

I checked out www.tobins.com.au but I'm unsure if the "240v spirals" are
the
ones I need or not.

Thanks.

Regards
KD

 

[Fat Crack Ho]

I'm toying with the idea of building a chronometer for measuring bullet speed.
Just want to get some opinions on the best type of sensors to use.

My basic idea was to have two sensors a fixed distance apart (1m for arguments
sake). When the bullet pass through the first sensor, zero a timer. When it
pass the second sensor, read the timer, work out speed.

thanks.