 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
nuckolls.bob(at)aeroelect
Guest
|
 Posted: Sat Nov 22, 2014 7:14 am Post subject: EMC lab look-see on HID lamps |
 |
|
I got a rare chance to get into the EMC lab yesterday
for some 'government work' . . .
I've had a couple of HID lamps laying around, one type that
I used in my car for a time with mixed results. Got some
nice data plots on the community of gremlins offered
by these automotive after-market products. They were not
as wicked as I might have guessed.
Spending the day in Wichita yesterday poked a big hole
in my to-do list . . . so follow up on this experiment
is a few days out . . . but preliminary perceptions
suggest that the OBAM builder wanting lots of light
on a 3-4 amp power budget would not be doing himself
a disservice by adding HID lamps into the list of
options.
Are there any List members flying HID out there now?
Bob . . .
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
 |
Mauledriver(at)nc.rr.com
Guest
|
| Posted: Sat Nov 22, 2014 7:33 am Post subject: EMC lab look-see on HID lamps |
|
|
On 11/22/2014 10:13 AM, Robert L. Nuckolls, III wrote:
| Quote: | --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com> (nuckolls.bob(at)aeroelectric.com)
I got a rare chance to get into the EMC lab yesterday
for some 'government work' . . .
I've had a couple of HID lamps laying around, one type that
I used in my car for a time with mixed results. Got some
nice data plots on the community of gremlins offered
by these automotive after-market products. They were not
as wicked as I might have guessed.
Spending the day in Wichita yesterday poked a big hole
in my to-do list . . . so follow up on this experiment
is a few days out . . . but preliminary perceptions
suggest that the OBAM builder wanting lots of light
on a 3-4 amp power budget would not be doing himself
a disservice by adding HID lamps into the list of
options.
Are there any List members flying HID out there now?
|
Yes, I installed kits from Duckworks in my RV10 wings. I bought them around 2007 and started using them in 2011. Each unit has a 55watts HID bulb but Duckworks has had upgrades of several kinds available for some time. I just installed them, liked the results over previous incandescents in a Maule, and forgot about them. They only used occasionally. They get bounced around a lot flying out of a rough field. No problems, good performance.
[quote][b]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
dee.whittington(at)gmail.
Guest
|
| Posted: Sat Nov 22, 2014 9:40 am Post subject: EMC lab look-see on HID lamps |
|
|
We installed the very first Duckworks HID light kit sold for a Sportsman. We had to modify the kit and make our own lens since Duckworks had never sold a kit for a Sportsman so we were told. We installed the largest bulbs available, I think 75w. We've turned them on several times, but since we are still not flying don't know how they will work for takeoff and landing. They are really, really bright. However, since we have a super-loaded 3-screen panel with all sorts of other electrical goodies for our electrically dependent Subaru engine, we are thinking we should have waited much longer to install landing light and chosen LED so the current draw woud be much lower.
One of my partners is worried that the Duckworks HIDs will give super light for take-off and landing, but maybe not for taxiing. We'll see.
DeWitt Whittington
dee.whittington(at)gmail.com (dee.whittington(at)gmail.com)
(804) 358-4333
804-677-4849 C
Richmond, VA USA
On Nov 22, 2014, at 10:32 AM, Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)> wrote:
[quote] On 11/22/2014 10:13 AM, Robert L. Nuckolls, III wrote:
| Quote: | --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com> (nuckolls.bob(at)aeroelectric.com)
I got a rare chance to get into the EMC lab yesterday
for some 'government work' . . .
I've had a couple of HID lamps laying around, one type that
I used in my car for a time with mixed results. Got some
nice data plots on the community of gremlins offered
by these automotive after-market products. They were not
as wicked as I might have guessed.
Spending the day in Wichita yesterday poked a big hole
in my to-do list . . . so follow up on this experiment
is a few days out . . . but preliminary perceptions
suggest that the OBAM builder wanting lots of light
on a 3-4 amp power budget would not be doing himself
a disservice by adding HID lamps into the list of
options.
Are there any List members flying HID out there now?
|
Yes, I installed kits from Duckworks in my RV10 wings. I bought them around 2007 and started using them in 2011. Each unit has a 55watts HID bulb but Duckworks has had upgrades of several kinds available for some time. I just installed them, liked the results over previous incandescents in a Maule, and forgot about them. They only used occasionally. They get bounced around a lot flying out of a rough field. No problems, good performance.
| Quote: |
href="http://www.aeroelectric.com/">www.aeroelectric.com
href="http://www.buildersbooks.com/">www.buildersbooks.com
href="http://www.homebuilthelp.com/">www.homebuilthelp.com
href="http://www.mypilotstore.com/">www.mypilotstore.com
href="http://www.mrrace.com/">www.mrrace.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
href="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matronics.com/Navigator?AeroElectric-List
href="http://forums.matronics.com/">http://forums.matronics.com
|
[b]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
nuckolls.bob(at)aeroelect
Guest
|
| Posted: Sun Nov 23, 2014 8:09 am Post subject: EMC lab look-see on HID lamps |
|
|
At 11:39 AM 11/22/2014, you wrote:
We installed the very first Duckworks HID light kit sold for a
Sportsman. We had to modify the kit and make our own lens since
Duckworks had never sold a kit for a Sportsman so we were told. We
installed the largest bulbs available, I think 75w. We've turned them
on several times, but since we are still not flying don't know how
they will work for takeoff and landing. They are really, really
bright. However, since we have a super-loaded 3-screen panel with all
sorts of other electrical goodies for our electrically dependent
Subaru engine, we are thinking we should have waited much longer to
install landing light and chosen LED so the current draw woud be much lower.
Landing lights, in every era of aviation, have
significant influence on issues of POWER (breaker,
switch and wire sizing) but very little influence
on ENERGY (alternator, battery sizing).
They're an intermittent load really useful for
mere seconds of every flight cycle. Have you
done a load analysis on your project?
One of my partners is worried that the Duckworks HIDs will give super
light for take-off and landing, but maybe not for taxiing. We'll see.
MOST of the HID after-market targets were
focused on down-the-road visibility,
not much interest in seeing around corners,
therefore, tightly beamed. A further thought
suggesets that very little light is needed to avoid
taxiing onto the grass . . . but even if the
'scatter' from your landing light is sufficient
to the task, the thing could make you unpopular
on the airport. We were taught at Mid Continent
to minimize the use of any lights on the GA
ramps and taxiways . . . having a bond-fide
retina-burner for a landing/taxi light could
draw some unkindly words from others out and
about in their airplanes after dark.
Is the Sportsman a tail dragger? Is the Duckworths
installation dual . . . one on each wing? You may
find that it's quite sufficient to leave one
side fitted with HID and replace the other side's
lamp with an LED flood for taxi.
Bob . . .
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
dee.whittington(at)gmail.
Guest
|
| Posted: Sun Nov 23, 2014 8:29 am Post subject: EMC lab look-see on HID lamps |
|
|
Thanks for the comments, Bob. We have a tri-gear Sportsman and dual just-inside-the-wingtips Duckworks HID lights. We have discussed the possibility of installing a basic 100w halogen light in the cowl to use for taxiing, but we were going to defer that decision until we test our installation when we move to the airport from the 3-car garage where we are building.
I'm sure you are right about current draw problems since we'll not be using the HID lights when we have the pitot heat on which is our heaviest single draw. And yes, we have done a basic load analysis which is what showed us we were indeed loading the system to at least within 20% of the full 75amp output of the alternator at times. We have dual Odyssey 680 batteries to support our 3.6L Subaru. And we have the Vertical Power VP-200 system to control most of our electrical system except the direct powering of the ECU to the Subaru to make sure even with a total VP-200 failure the engine would continue to operate.
Dee
DeWitt (Dee) WhittingtonRichmond, VA
804-677-4849 iPhone
804-358-4333 Home
On Sun, Nov 23, 2014 at 11:07 AM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:
[quote]--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>
At 11:39 AM 11/22/2014, you wrote:
We installed the very first Duckworks HID light kit sold for a Sportsman. We had to modify the kit and make our own lens since Duckworks had never sold a kit for a Sportsman so we were told. We installed the largest bulbs available, I think 75w. We've turned them on several times, but since we are still not flying don't know how they will work for takeoff and landing. They are really, really bright. However, since we have a super-loaded 3-screen panel with all sorts of other electrical goodies for our electrically dependent Subaru engine, we are thinking we should have waited much longer to install landing light and chosen LED so the current draw woud be much lower.
 Landing lights, in every era of aviation, have
 significant influence on issues of POWER (breaker,
 switch and wire sizing) but very little influence
 on ENERGY (alternator, battery sizing).
 They're an intermittent load really useful for
 mere seconds of every flight cycle. Have you
 done a load analysis on your project?
One of my partners is worried that the Duckworks HIDs will give super light for take-off and landing, but maybe not for taxiing. We'll see.
 MOST of the HID after-market targets were
 focused on down-the-road visibility,
 not much interest in seeing around corners,
 therefore, tightly beamed. A further thought
 suggesets that very little light is needed to avoid
 taxiing onto the grass . . . but even if the
 'scatter' from your landing light is sufficient
 to the task, the thing could make you unpopular
 on the airport. We were taught at Mid Continent
 to minimize the use of any lights on the GA
 ramps and taxiways . . . having a bond-fide
 retina-burner for a landing/taxi light could
 draw some unkindly words from others out and
 about in their airplanes after dark.
 Is the Sportsman a tail dragger? Is the Duckworths
 installation dual . . . one on each wing? You may
 find that it's quite sufficient to leave one
 side fitted with HID and replace the other side's
 lamp with an LED flood for taxi.
 Bob . . .
====================================
br> fts!)
r> > /www.aeroelectric.com" target="_blank">www.aeroelectric.com
w.buildersbooks.com" target="_blank">www.buildersbooks.com
p.com" target="_blank">www.homebuilthelp.com
e.com" target="_blank">www.mypilotstore.com
" target="_blank">www.mrrace.com
target="_blank">http://www.matronics.com/contribution
     -Matt Dralle, List Admin.
====================================
-
Electric-List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
====================================
FORUMS -
_blank">http://forums.matronics.com
====================================
[b]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
Eric M. Jones
Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts
|
| Posted: Sun Nov 23, 2014 11:14 am Post subject: Re: EMC lab look-see on HID lamps |
|
|
I built medical lighting systems for decades. These included halogens, HIDs, xenon arcs, flashing xenon gas tubes, even flashing short-arcs, HP Sodiums and some other esoteric systems such as mercury arc UV systems.
I am also a giant proponent of LEDs.
But I could easily make the case for HIDs being the premier light source as far as optics go, because they have the highest source luminance of any possible (okay, non-nuclear) light source. This is to say, they are very small and very brilliant, which makes possible the design of optics sending the most light down range most effectively.
So why doesn't the whole world use HIDs? Two reasons:
1) It's because they require power supplies (ballasts + starters) that are specifically designed for them. These power supplies used to be relatively expensive, but not so now. Although HIDs have remarkably long lifetimes (5000 hours is typical), the power supplies have shorter lifetimes than that, especially if they are abused.
2) They are still relatively new. We have seen small HIDs only since 1990.
Even though LEDs will be everywhere, we will still see HIDs where long searchlight beams are required. Xenons will be a player too, mostly where color rendition is critical and cost isn't.
My experience has never been that HIDs are noisy. The trick is to keep the electrodes in thermionic emission (hot). A cool electrode makes a noisy lamp.
Since I sell wig-wags where people want to use them with HIDs, I offer the following abbreviated advice:
--everything I know says not to wig-wag HID lamps because they will have shorter lamp lifetimes. Everything that is an advantage of HID lamps disappears quickly if one abuses them by, oh let's say… 2500 restarts per hour! ... Furthermore, switched mode power supplies and starters are particularly failure-prone when abused. I can promise you that the manufacturer of the lamp-supply and starter DO NOT warranty their devices to be used in this fashion.
But here is what it takes if you want to do it. Here are the basic issues with HID lamps used with Perihelion Design’s Wig-Wags:
1: The high-voltage ignition can feed back through the wiring and destroy solid-state electronics. Everything might be okay, then on some rainy night…ka-pow…! To prevent this I have added a bidirectional Zener, near the ballast. DO NOT put it between the HV ignitor and the lamp. These parts are P6KE18CA (for 14V systems) which I also sell as SnapJacks.
2: The sudden negative resistance of the lamp induces a large current, which if it comes from the Wig-Wag, will destroy the device. A CL-21 Inrush current limiter will prevent this for HID lamps up to 50 W. For larger HID lamps use CL-11. The current limiters will get hot, as they are supposed to, and should be placed where they don’t get air-cooled.
So I still love LEDs, but if you really need to see the deer at the other end of the runway, HIDs will do the job. If you want to wig-wag them, expect shorter lamp lifetimes, and shorter ballast lifetimes.
ps: Bob, my last (175W) xenon short arc system was so EMC/RFI quiet that the test technician could not tell if it was on or off unless he opened the test chamber door and LOOKED to see if it had light coming out.
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net |
|
| Back to top |
|
|
nuckolls.bob(at)aeroelect
Guest
|
| Posted: Sun Nov 23, 2014 6:27 pm Post subject: EMC lab look-see on HID lamps |
|
|
| Quote: | I'm sure you are right about current draw problems since we'll not
be using the HID lights when we have the pitot heat on which is our
heaviest single draw. And yes, we have done a basic load analysis
which is what showed us we were indeed loading the system to at
least within 20% of the full 75amp output of the alternator at times.
|
I'd like to see that analysis . . . Did
an analysis on a full-up IFR outfitted RV
some years back and came up with a 27A
max continuous load . . . it would be
enlightening to see your list of loads.
Bob . . .
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
jluckey(at)pacbell.net
Guest
|
| Posted: Mon Nov 24, 2014 9:38 am Post subject: EMC lab look-see on HID lamps |
|
|
wow, "thermionic emission" - I like that!
Does it have anything to do with tachyon fields or photon torpedoes? 
-Jeff
do not archive
On Sunday, November 23, 2014 11:24 AM, Eric M. Jones <emjones(at)charter.net> wrote:
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones(at)charter.net (emjones(at)charter.net)>I built medical lighting systems for decades. These included halogens, HIDs, xenon arcs, flashing xenon gas tubes, even flashing short-arcs, HP Sodiums and some other esoteric systems such as mercury arc UV systems. I am also a giant proponent of LEDs.But I could easily make the case for HIDs being the premier light source as far as optics go, because they have the highest source luminance of any possible (okay, non-nuclear) light source. This is to say, they are very small and very brilliant, which makes possible the design of optics sending the most light down range most effectively. So why doesn't the whole world use HIDs? Two reasons: 1) It's because they require power supplies (ballasts + starters) that are specifically designed for them. These power supplies used to be relatively expensive, but not so now. Although HIDs have remarkably long lifetimes (5000 hours is typical), the power supplies have shorter lifetimes than that, especially if they are abused.2) They are still relatively new. We have seen small HIDs only since 1990. Even though LEDs will be everywhere, we will still see HIDs where long searchlight beams are required. Xenons will be a player too, mostly where color rendition is critical and cost isn't.My experience has never been that HIDs are noisy. The trick is to keep the electrodes in thermionic emission (hot). A cool electrode makes a noisy lamp.Since I sell wig-wags where people want to use them with HIDs, I offer the following abbreviated advice:--everything I know says not to wig-wag HID lamps because they will have shorter lamp lifetimes. Everything that is an advantage of HID lamps disappears quickly if one abuses them by, oh let's say… 2500 restarts per hour! ... Furthermore, switched mode power supplies and starters are particularly failure-prone when abused. I can promise you that the manufacturer of the lamp-supply and starter DO NOT warranty their devices to be used in this fashion. But here is what it takes if you want to do it. Here are the basic issues with HID lamps used with Perihelion Design’s Wig-Wags:1: The high-voltage ignition can feed back through the wiring and destroy solid-state electronics. Everything might be okay, then on some rainy night…ka-pow…! To prevent this I have added a bidirectional Zener, near the ballast. DO NOT put it between the HV ignitor and the lamp. These parts are P6KE18CA (for 14V systems) which I also sell as SnapJacks.2: The sudden negative resistance of the lamp induces a large current, which if it comes from the Wig-Wag, will destroy the device. A CL-21 Inrush current limiter will prevent this for HID lamps up to 50 W. For larger HID lamps use CL-11. The current limiters will get hot, as they are supposed to, and should be placed where they don’t get air-cooled.So I still love LEDs, but if you really need to see the deer at the other end of the runway, HIDs will do the job. If you want to wig-wag them, expect shorter lamp lifetimes, and shorter ballast lifetimes.ps: Bob, my last (175W) xenon short arc system was so EMC/RFI quiet that the test technician could not tell if it was on or off unless he opened the test chamber door and LOOKED to see if it had light coming out.--------Eric M. Joneswww.PerihelionDesign.com113 Brentwood DriveSouthbridge, MA 01550(508) 764-2072emjones(at)charter.netRead this topic online here:http://forums.matronics.com/viewtopic.php?p=434465#434465http://www.matronics.com/contributionhank you for nbsp; -Matt Dralle, List Admin.http://www.matronics.com/Navigator?AeroElectric-List
[quote][b]
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
voltar(at)vx-aviation.com
Guest
|
| Posted: Mon Nov 24, 2014 10:09 am Post subject: EMC lab look-see on HID lamps |
|
|
No, just vacuum tubes and CRTs. Don’t you remember the 1960s? Perhaps a better term would be ‘boiling electrons’ but that’s too street for us highbrows [img]cid:EB8E8B10DA314E96B9916DD361EA59F6(at)Sprocket[/img].
From: Jeff Luckey (jluckey(at)pacbell.net)
Sent: Monday, November 24, 2014 9:36 AM
To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com)
Subject: Re: Re: EMC lab look-see on HID lamps
wow, "thermionic emission" - I like that!
Does it have anything to do with tachyon fields or photon torpedoes?
-Jeff
do not archive
On Sunday, November 23, 2014 11:24 AM, Eric M. Jones <emjones(at)charter.net> wrote:
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones(at)charter.net (emjones(at)charter.net)>
I built medical lighting systems for decades. These included halogens, HIDs, xenon arcs, flashing xenon gas tubes, even flashing short-arcs, HP Sodiums and some other esoteric systems such as mercury arc UV systems.
I am also a giant proponent of LEDs.
But I could easily make the case for HIDs being the premier light source as far as optics go, because they have the highest source luminance of any possible (okay, non-nuclear) light source. This is to say, they are very small and very brilliant, which makes possible the design of optics sending the most light down range most effectively.
So why doesn't the whole world use HIDs? Two reasons:
1) It's because they require power supplies (ballasts + starters) that are specifically designed for them. These power supplies used to be relatively expensive, but not so now. Although HIDs have remarkably long lifetimes (5000 hours is typical), the power supplies have shorter lifetimes than that, especially if they are abused.
2) They are still relatively new. We have seen small HIDs only since 1990.
Even though LEDs will be everywhere, we will still see HIDs where long searchlight beams are required. Xenons will be a player too, mostly where color rendition is critical and cost isn't.
My experience has never been that HIDs are noisy. The trick is to keep the electrodes in thermionic emission (hot). A cool electrode makes a noisy lamp.
Since I sell wig-wags where people want to use them with HIDs, I offer the following abbreviated advice:
--everything I know says not to wig-wag HID lamps because they will have shorter lamp lifetimes. Everything that is an advantage of HID lamps disappears quickly if one abuses them by, oh let's say… 2500 restarts per hour! ... Furthermore, switched mode power supplies and starters are particularly failure-prone when abused. I can promise you that the manufacturer of the lamp-supply and starter DO NOT warranty their devices to be used in this fashion.
But here is what it takes if you want to do it. Here are the basic issues with HID lamps used with Perihelion Design’s Wig-Wags:
1: The high-voltage ignition can feed back through the wiring and destroy solid-state electronics. Everything might be okay, then on some rainy night…ka-pow…! To prevent this I have added a bidirectional Zener, near the ballast. DO NOT put it between the HV ignitor and the lamp. These parts are P6KE18CA (for 14V systems) which I also sell as SnapJacks.
2: The sudden negative resistance of the lamp induces a large current, which if it comes from the Wig-Wag, will destroy the device. A CL-21 Inrush current limiter will prevent this for HID lamps up to 50 W. For larger HID lamps use CL-11. The current limiters will get hot, as they are supposed to, and should be placed where they don’t get air-cooled.
So I still love LEDs, but if you really need to see the deer at the other end of the runway, HIDs will do the job. If you want to wig-wag them, expect shorter lamp lifetimes, and shorter ballast lifetimes.
ps: Bob, my last (175W) xenon short arc system was so EMC/RFI quiet that the test technician could not tell if it was on or off unless he opened the test chamber door and LOOKED to see if it had light coming out.
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=434465#434465
http://www.matronics.com/contributionhank you for nbsp; -Matt Dralle, List Admin.http://www.matronics.com/Navigator?AeroElectric-Listhttp://forums.matronics.com
| Quote: |
href="http://www.aeroelectric.com">www.aeroelectric.com
href="http://www.buildersbooks.com">www.buildersbooks.com
href="http://www.homebuilthelp.com">www.homebuilthelp.com
href="http://www.mypilotstore.com">www.mypilotstore.com
href="http://www.mrrace.com">www.mrrace.com
href="http://www.matronics.com/contribution">http://www.matronics.com/chref="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matronics.com/Navigator?AeroElectric-List
href="http://forums.matronics.com">http://forums.matronics.com
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
| Description: |
|
| Filesize: |
1.02 KB |
| Viewed: |
5503 Time(s) |
![wlEmoticon-smile[1].png](files/wlEmoticon-smile_1__124.png)
|
|
|
| Back to top |
|
|
sportav8r(at)gmail.com
Guest
|
| Posted: Mon Nov 24, 2014 10:39 am Post subject: EMC lab look-see on HID lamps |
|
|
Thermionic emission. Yeah. Fleming was rectifying AC with it 110 years
ago, and then a couple years later, DeForest stuck a hairpin between the
'odes and started the electronic age with detection and amplification..
.the rest is history.
On Mon, Nov 24, 2014 at 12:36 PM, Jeff Luckey <jluckey(at)pacbell.net> wrote:
[quote] wow, "thermionic emission" - I like that!
Does it have anything to do with tachyon fields or photon torpedoes?
-Jeff
do not archive
On Sunday, November 23, 2014 11:24 AM, Eric M. Jones <
emjones(at)charter.net> wrote:
emjones(at)charter.net>
I built medical lighting systems for decades. These included halogens,
HIDs, xenon arcs, flashing xenon gas tubes, even flashing short-arcs, HP
Sodiums and some other esoteric systems such as mercury arc UV systems.
I am also a giant proponent of LEDs.
But I could easily make the case for HIDs being the premier light source
as far as optics go, because they have the highest source luminance of any
possible (okay, non-nuclear) light source. This is to say, they are very
small and very brilliant, which makes possible the design of optics sending
the most light down range most effectively.
So why doesn't the whole world use HIDs? Two reasons:
1) It's because they require power supplies (ballasts + starters) that are
specifically designed for them. These power supplies used to be relatively
expensive, but not so now. Although HIDs have remarkably long lifetimes
(5000 hours is typical), the power supplies have shorter lifetimes than
that, especially if they are abused.
2) They are still relatively new. We have seen small HIDs only since 1990
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
henador_titzoff(at)yahoo.
Guest
|
| Posted: Mon Nov 24, 2014 10:39 am Post subject: EMC lab look-see on HID lamps |
|
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
