Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Experiments & Modifications



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 01-13-2010, 11:52 PM #1
Alshere's Avatar
Class 1 Laser
 
Join Date: May 2009
Location: Southern Ohio US
Posts: 67
Rep Power: 12
Alshere is just really niceAlshere is just really niceAlshere is just really niceAlshere is just really nice
Alshere Alshere is offline
Class 1 Laser
Alshere's Avatar
 
Join Date: May 2009
Location: Southern Ohio US
Posts: 67
Rep Power: 12
Alshere is just really niceAlshere is just really niceAlshere is just really niceAlshere is just really nice
Default Two Hene tubes run off one power supply without damage?

The subject says it all. Can you run two HeNe's off one power supply and have them last. I know it will work I have 2 Siemens LGR 7641 tubes roughly 1.2 MW output and a brick power supply rated at 2400 volts dc and 6.5 ma.

Taking a mW reading on each tube before and after I see a .1 mW reduction(average) on the tube at the (cathode) end of the series circuit. A single resistor is used.

According to Sam's FAQ laser output power is a fair indication the tube power requirements are in range. I have the right power supply rated at 1.6 to 2.0 kvdc and 6.0 ma or at least it should be "in range" for a single tube I used to get a baseline of mw output. Also I think they are fairly tolerant of power ranges?

I have a digital mm but lack anyway to safely measure hv. Or if I have the way I do not have the knowledge.

So will this take out the power supply, significantly reduce tube life?

A better test procedure?
Things to consider?

Anyway looking at making a lamp using the heat to turn a basic lumia wheel at the top and I want to keep the number of power supplies down so double up. Triple possible?? .

Anyway Thank you in advance


__________________
Reserved for something to say. Please standby
Alshere is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 01-14-2010, 02:47 AM #2
Banned
 
Join Date: Apr 2007
Location: Cupertino CA
Posts: 1,076
Rep Power: 0
Laser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond repute
Send a message via AIM to Laser_Ben
Laser_Ben Laser_Ben is offline
Banned
 
Join Date: Apr 2007
Location: Cupertino CA
Posts: 1,076
Rep Power: 0
Laser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond repute
Send a message via AIM to Laser_Ben
Default Re: Two Hene tubes run off one power supply without damage?

No, it is not a good idea, just use 2 power supplies. It can damage the starter.
Laser_Ben is offline   Reply With Quote
Old 01-14-2010, 03:15 AM #3
Class 3B Laser
 
Join Date: Oct 2009
Location: Central New York State - Watkins Glen - planet Earth
Posts: 2,745
Rep Power: 101
photonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond repute
photonaholic photonaholic is offline
Class 3B Laser
 
Join Date: Oct 2009
Location: Central New York State - Watkins Glen - planet Earth
Posts: 2,745
Rep Power: 101
photonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond repute
Default Re: Two Hene tubes run off one power supply without damage?

Quote:
Originally Posted by Laser_Ben View Post
No, it is not a good idea, just use 2 power supplies. It can damage the starter.
Just one of the many reasons I always read Ben's posts.

I figured, rather I just somehow knew this was a bad idea, I just could not explain why.......

Using anything outside it's engineered parameters is not a good idea.

It's kinda like trying to shoot 20 gauge shells from a 12 gauge shotgun, bad idea. Sure with enough tape you could make the shell fit the chamber, but is it going to perform as expected? most likely not.
__________________
Thanks for reading my post.
Kind regards, Wayne

------------------------------------------------------------------
"Disclaimer: all posts made by me are based on my own opinion only,
That opinion is subject to change without notice."


Too much knowledge is dangerous, not enough is worse.
Adapted from Einstein quote.
------------------------------------------------------------------
If you want to burn things, buy a lighter
------------------------------------------------------------------
My Pet Forums - for the animal fans Link
Dances With Reptiles - If you like snakes Link
photonaholic is offline   Reply With Quote
Old 01-14-2010, 09:24 AM #4
Alshere's Avatar
Class 1 Laser
 
Join Date: May 2009
Location: Southern Ohio US
Posts: 67
Rep Power: 12
Alshere is just really niceAlshere is just really niceAlshere is just really niceAlshere is just really nice
Alshere Alshere is offline
Class 1 Laser
Alshere's Avatar
 
Join Date: May 2009
Location: Southern Ohio US
Posts: 67
Rep Power: 12
Alshere is just really niceAlshere is just really niceAlshere is just really niceAlshere is just really nice
Default Re: Two Hene tubes run off one power supply without damage?

Thanks Ben. I kinda thought that would be the answer. Time to get another base.

Al
__________________
Reserved for something to say. Please standby
Alshere is offline   Reply With Quote
Old 01-14-2010, 10:21 AM #5
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: Two Hene tubes run off one power supply without damage?

It's cause He-Ne psu is planned for give a high voltage at a low current when the tube is not turned on, and then, when the plasma start, reduce the voltage and increase the current for make it work in the right range ..... probably, if you use 2 tubes in series, they don't lase (not trigger), and if you try in parallel, the first one that trigger, just block the higher voltage, so the second one never trigger .....
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote
Old 01-14-2010, 08:55 PM #6
Bluefan's Avatar
Class 3R Laser
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Bluefan Bluefan is offline
Class 3R Laser
Bluefan's Avatar
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Default Re: Two Hene tubes run off one power supply without damage?

In series may work if the trigger pulse can start both, but this is experimental ground, and you can easily blow a few psu's in the process.
Bluefan is offline   Reply With Quote
Old 01-14-2010, 09:18 PM #7
Alshere's Avatar
Class 1 Laser
 
Join Date: May 2009
Location: Southern Ohio US
Posts: 67
Rep Power: 12
Alshere is just really niceAlshere is just really niceAlshere is just really niceAlshere is just really nice
Alshere Alshere is offline
Class 1 Laser
Alshere's Avatar
 
Join Date: May 2009
Location: Southern Ohio US
Posts: 67
Rep Power: 12
Alshere is just really niceAlshere is just really niceAlshere is just really niceAlshere is just really nice
Default Re: Two Hene tubes run off one power supply without damage?

Well they do fire.

Yes they are in series. My thoughts are if if one tube fired and stayed lit they both would. Otherwise you would not have a complete circuit.

I can post a pic as soon as I find my card reader. Like I said they put out roughly the same mW lasing as when the power supply that is sized for the tube. Sam's references that is a rough way to tell if it is getting the right voltage/amp but not the recommended way.

The only question was will it fry the brick and/or shorten the tube life. Seems to be the case, but an old time TV tech said it should be fine. He has also offered to measure the voltage and amps for me. He did make sure I was using a fuse with all my tubes but that is a no brainier.

I think I will let him test it and see what it reads. All knowledge is good and I have three of the same supply. Three of the same tubes for that matter.

I will post back when I get a chance to have them tested. My testing is on hold for now..
__________________
Reserved for something to say. Please standby

Last edited by Alshere; 01-14-2010 at 09:24 PM. Reason: typo
Alshere is offline   Reply With Quote
Old 01-15-2010, 08:57 AM #8
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Question Re: Two Hene tubes run off one power supply without damage?

If they works in serie, then you have a PSU with a damn high trigger level at output

Means, usually bricks PSU are planned for lit up tubes with a specific trigger threshold, and theorically 2 tubes in series have a threshold too high for first start ..... ofcourse, when the first lit up, the second get all the voltage and lit up also, the strange thing is that the triggering pulse is high enough for lit up both them ..... or you are using a more powerful PSU ? ..... like, 5 or 10mW psu for a pair of 2mW tubes ?

When i tried with 2 5mW tubes and a 5mW PSU, they've just not lit up .....
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote
Old 01-15-2010, 11:10 PM #9
Alshere's Avatar
Class 1 Laser
 
Join Date: May 2009
Location: Southern Ohio US
Posts: 67
Rep Power: 12
Alshere is just really niceAlshere is just really niceAlshere is just really niceAlshere is just really nice
Alshere Alshere is offline
Class 1 Laser
Alshere's Avatar
 
Join Date: May 2009
Location: Southern Ohio US
Posts: 67
Rep Power: 12
Alshere is just really niceAlshere is just really niceAlshere is just really niceAlshere is just really nice
Default Re: Two Hene tubes run off one power supply without damage?

Hey HIMNL9

Yes I put that in the original post but probably wasn't clear enough. The power supply I used is rated at 2400 volts dc and 6.5 ma.

My idea was to duplicate the tube length to some extent and allow for the resistor. So a bit under twice the "current?" into two tubes with a combined length 3 inches longer than the tube the power suppy is rated for. Allowing for the narrower bore.


Any thoughts, warnings etc...

Also here is the pic. I took when I had them going.
Attached Thumbnails
Two Hene tubes run off one power supply without damage?-two-hene.jpg   Two Hene tubes run off one power supply without damage?-comparison.jpg  
__________________
Reserved for something to say. Please standby

Last edited by Alshere; 01-16-2010 at 09:59 AM.
Alshere is offline   Reply With Quote
Old 01-16-2010, 04:22 AM #10
Class 1M Laser
 
Join Date: Nov 2009
Posts: 222
Rep Power: 20
Solonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud of
Solonar Solonar is offline
Class 1M Laser
 
Join Date: Nov 2009
Posts: 222
Rep Power: 20
Solonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud ofSolonar has much to be proud of
Default Re: Two Hene tubes run off one power supply without damage?

An example of some HeNe PSU's

The small PSU on the bottom is rated at 1300-2600 V @ 6.5mA The tube above it is the largest it will light.

The middle PSU is rated at 2800V @ 5.5 - 7.5 mA its the only PSU I have that will ignite the big tube.

The big PSU on top is rated at 5 - 12.5kV @ 4-10 mA. Its actually 1 of a pair used for a small 10W waveguide Co2

Since series voltages are additive a PSU like this might work.

Solonar is offline   Reply With Quote
Old 01-16-2010, 05:56 PM #11
Bluefan's Avatar
Class 3R Laser
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Bluefan Bluefan is offline
Class 3R Laser
Bluefan's Avatar
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Default Re: Two Hene tubes run off one power supply without damage?

Just make sure everything adds up (or not) correctly. HeNe power supplies are current sources, make sure the power supply has a proper current set for the tube, this current set is the same as a single tube would have, we're in series here, current doesn't change. The voltage doesn add up, the psu needs to have the double voltage in it's compliance range. I'm not sure about the trigger voltage, but I really think the double is here needed too.
Bluefan is offline   Reply With Quote
Old 01-16-2010, 10:07 PM #12
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,141
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,141
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Two Hene tubes run off one power supply without damage?

Quote:
Originally Posted by Laser_Ben View Post
It can damage the starter.
How?

(more characters required)
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 11:44 AM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC