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INTEREST GAUGE for PHAZOR Diodes -- 200mW CW!!!
- Thread starter Daedal
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jayrob
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Re: INTEREST GAUGE for PHAZOR Diodes -- 200mW CW!!
Jay
Gazoo, it makes me wonder too...So far, no problems with the Senkat diode at 323mA. (short duty) But I am wondering about the driver I was using for the AixiZ. I measured 3.22 volts at the diode. Do you think the voltage might have been what killed it? I may not want to use that driver anymore...just stick with DDL's driver.Gazoo said:
Jay
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Gazoo
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Re: INTEREST GAUGE for PHAZOR Diodes -- 200mW CW!!
Seriously I doubt it was the voltage that killed it since it is regulated. I think it has more to do with Aixiz stating they are selling a diode that is rated at 200mw's CW...when in fact it is not. But when Daedal gets a chance to do further testing on that diode we may know more of the story. My open can diode runs at 2.84 volts with 350ma's of current, and 3.44 volts with 600ma's. I don't know what the SenKat diodes voltage would be with 350ma's running into it.
What is the voltage of your SenKat diode running with 323ma's???
Seriously I doubt it was the voltage that killed it since it is regulated. I think it has more to do with Aixiz stating they are selling a diode that is rated at 200mw's CW...when in fact it is not. But when Daedal gets a chance to do further testing on that diode we may know more of the story. My open can diode runs at 2.84 volts with 350ma's of current, and 3.44 volts with 600ma's. I don't know what the SenKat diodes voltage would be with 350ma's running into it.
What is the voltage of your SenKat diode running with 323ma's???
jayrob
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Re: INTEREST GAUGE for PHAZOR Diodes -- 200mW CW!!
The Senkat diode I am running at 323mA using DDL's driver set up is measuring 2.88 volts. So far, so good! LarryQ says he's been running at this current for some time now...Sturdy little suckers! (Thanks Greg!)
Jay
The Senkat diode I am running at 323mA using DDL's driver set up is measuring 2.88 volts. So far, so good! LarryQ says he's been running at this current for some time now...Sturdy little suckers! (Thanks Greg!)
Jay
Gazoo
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Re: INTEREST GAUGE for PHAZOR Diodes -- 200mW CW!!
Yeah, I am surprised by how well they are holding up. I am tempted to remove the limiting resistor from my AMC7135 and let the full 350ma's run into my SenKat diode. If I get the guts I will let you know..lol Right now it is running at 270ma's.
Yeah, I am surprised by how well they are holding up. I am tempted to remove the limiting resistor from my AMC7135 and let the full 350ma's run into my SenKat diode. If I get the guts I will let you know..lol Right now it is running at 270ma's.
Gazoo
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Re: INTEREST GAUGE for PHAZOR Diodes -- 200mW CW!!
It is a 33ohm resistor. Same as before when I was getting 240ma's. But I fried that driver and diode. With the new driver and diode it measures 270ma's. However I used my meter in series with the amp setting to measure the current where as before I was measuring voltage across a 1 ohm resistor. Maybe I should put the resistor back and see what it measures at.
I used a 7135 to power an open can diode and it measured 370ma's with the meter on the amp setting. Maybe my meter is acting up. I would not think it should be 20ma's off taking readings on the 10 amp scale.
ADDED: I put the 1 ohm resistor back in the circuit and I measured 265 millivolts. The only thing I can think of that caused the difference between the measurement of the first diode vs. the second diode is the internal resistance of the diode may be a little different.
Also according to AMC, the difference in the current the 7135 provides will vary some between regulators.
http://www.micro-bridge.com/AMC7135.asp
It is a 33ohm resistor. Same as before when I was getting 240ma's. But I fried that driver and diode. With the new driver and diode it measures 270ma's. However I used my meter in series with the amp setting to measure the current where as before I was measuring voltage across a 1 ohm resistor. Maybe I should put the resistor back and see what it measures at.
I used a 7135 to power an open can diode and it measured 370ma's with the meter on the amp setting. Maybe my meter is acting up. I would not think it should be 20ma's off taking readings on the 10 amp scale.
ADDED: I put the 1 ohm resistor back in the circuit and I measured 265 millivolts. The only thing I can think of that caused the difference between the measurement of the first diode vs. the second diode is the internal resistance of the diode may be a little different.
Also according to AMC, the difference in the current the 7135 provides will vary some between regulators.
http://www.micro-bridge.com/AMC7135.asp
Kenom
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Re: INTEREST GAUGE for PHAZOR Diodes -- 200mW CW!!
OK so every time I see someone testing a diode it is with a TEC. It's kinda stupid to run that test because not many of us are using these with TEC's. Oh don't get me wrong there are a few "labby" style lasers out there that have been put together with the GB diodes. but in real world applications there is little if any passive cooling. So, when testing these things we should be testing them with only limited passive heatsinking. Like say for example. I run every single one of my Dorcy JR.'s off 300-350ma. with passive cooling in the heatsinks I'm using I'm getting an average of 150-180mw. I've had one or two go above that but not much. Max I've seen is about 190mw. So with 350ma on a senkat gb diode with little or no passive heatsinking you can figure your going to get about 175mw. This is a truth I've come to see in my own builds and I've built a total of 13 of these particular dorcy lasers.
OK so every time I see someone testing a diode it is with a TEC. It's kinda stupid to run that test because not many of us are using these with TEC's. Oh don't get me wrong there are a few "labby" style lasers out there that have been put together with the GB diodes. but in real world applications there is little if any passive cooling. So, when testing these things we should be testing them with only limited passive heatsinking. Like say for example. I run every single one of my Dorcy JR.'s off 300-350ma. with passive cooling in the heatsinks I'm using I'm getting an average of 150-180mw. I've had one or two go above that but not much. Max I've seen is about 190mw. So with 350ma on a senkat gb diode with little or no passive heatsinking you can figure your going to get about 175mw. This is a truth I've come to see in my own builds and I've built a total of 13 of these particular dorcy lasers.
Gazoo
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Re: INTEREST GAUGE for PHAZOR Diodes -- 200mW CW!!
Well when I said a Sony GB diode running 300ma's will provide an output of 200mw's I was going by Mike's graph. I checked the output of mine running with 265ma's and it is putting out 163mw's. There is no TEC cooling on that diode.
Well when I said a Sony GB diode running 300ma's will provide an output of 200mw's I was going by Mike's graph. I checked the output of mine running with 265ma's and it is putting out 163mw's. There is no TEC cooling on that diode.
Kenom
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Re: INTEREST GAUGE for PHAZOR Diodes -- 200mW CW!!
yeah and if I remember correctly mikes graph was created using a TEC. I could be wrong. now I gotta go look.
I've got a meter now so could probably do my own testing of these diodes over and over again with each and every one I make. I've got another 10 diodes on the way and should have a lot more info coming soon.
yeah and if I remember correctly mikes graph was created using a TEC. I could be wrong. now I gotta go look.
I've got a meter now so could probably do my own testing of these diodes over and over again with each and every one I make. I've got another 10 diodes on the way and should have a lot more info coming soon.
Gazoo
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Re: INTEREST GAUGE for PHAZOR Diodes -- 200mW CW!!
You will probably notice that as the diode heats up the power output goes down. This is the biggest advantage of a TEC and it should also extend the life of a diode. It is almost a must with my open can because I am now running it with 600ma's. I am sure the passive heatsinking is sufficient for the GB diodes as long as one doesn't get carried away with long duty cycles, and I have no plans to use a TEC with them.
Anyway I am curious what the output would be with 300ma's or so and when I can get around to it I will check it out. I would think it should correspond with Mike's graph as long as the reading is taken before the diode has a chance to heat up.
You will probably notice that as the diode heats up the power output goes down. This is the biggest advantage of a TEC and it should also extend the life of a diode. It is almost a must with my open can because I am now running it with 600ma's. I am sure the passive heatsinking is sufficient for the GB diodes as long as one doesn't get carried away with long duty cycles, and I have no plans to use a TEC with them.
Anyway I am curious what the output would be with 300ma's or so and when I can get around to it I will check it out. I would think it should correspond with Mike's graph as long as the reading is taken before the diode has a chance to heat up.
Re: INTEREST GAUGE for PHAZOR Diodes -- 200mW CW!!
I can send you the spec sheet.
cmaricle@mfgcn.com
I can send you the spec sheet.
cmaricle@mfgcn.com
