argon
0
- Joined
- Jan 13, 2010
- Messages
- 72
- Points
- 8
Dear Laserfreaks out there :yh:
It's been a while since I posted last time here.
Now I come up with a starting problem regarding a jdsu uniphase 2213 argon laser.
I bought this tube for little money, without power supply or cooling unit. At first, I thought to test the tube just with a very simpel pulse circuit, because I have no cooling fan yet, as discribed on sam's laser repair. I heated up the filament with 3V / 15A. Then I charged up a 100µF/400V capacitor to about 150 to 160V for providing the anode voltage for a short pulse. Then I gave 12V to start + and start - terminals on the head (violett and green wire). The igniter pulses can be heard, but the tube doesn't flash and there is no current flowing through the tube. I checked a few things:
Filament is okay and doesn't hang into the beam.
I hooked up a HeNe power supply to the tube to check if the tube didn't come up to athmospheric pressure. There was a violett/pink gas discharge visible, so I think, the tube should not be leaky. Then I checked, if the anode voltage can be measured directly across the tube, voltage was present. I then hooked up the tube to my selfmade ion laser power supply but it didn't start, I provided 150 to 170V anode voltage and tried with tube currents between 4 and 7A. There was never flowing any tube current. I then tried to measure the HV-peaks from the igniter, although I could hear the pulses. I hooked up a HV-probe with Scope to the tube. Igniter pulses were around 15kV and occured about twice a second, but actually the highvoltage probe I used is normally intented for measuring 50Hz and DC, no high frequency pulses, so I'm not quite sure, if the results are okay. The pulses were very short and there was no ringing, just very short spikes. I suspect that the igniter could be the problem, but it could also be the tube itself.
What do you argon laser specialists out there think about the failure? Could it be that the igniter hv-transformer has a shorted winding or something like that?
Any help or hint or schematic is very much appreciated! :beer:
Thanks for reading this and a nice weekend
argon
It's been a while since I posted last time here.
Now I come up with a starting problem regarding a jdsu uniphase 2213 argon laser.
I bought this tube for little money, without power supply or cooling unit. At first, I thought to test the tube just with a very simpel pulse circuit, because I have no cooling fan yet, as discribed on sam's laser repair. I heated up the filament with 3V / 15A. Then I charged up a 100µF/400V capacitor to about 150 to 160V for providing the anode voltage for a short pulse. Then I gave 12V to start + and start - terminals on the head (violett and green wire). The igniter pulses can be heard, but the tube doesn't flash and there is no current flowing through the tube. I checked a few things:
Filament is okay and doesn't hang into the beam.
I hooked up a HeNe power supply to the tube to check if the tube didn't come up to athmospheric pressure. There was a violett/pink gas discharge visible, so I think, the tube should not be leaky. Then I checked, if the anode voltage can be measured directly across the tube, voltage was present. I then hooked up the tube to my selfmade ion laser power supply but it didn't start, I provided 150 to 170V anode voltage and tried with tube currents between 4 and 7A. There was never flowing any tube current. I then tried to measure the HV-peaks from the igniter, although I could hear the pulses. I hooked up a HV-probe with Scope to the tube. Igniter pulses were around 15kV and occured about twice a second, but actually the highvoltage probe I used is normally intented for measuring 50Hz and DC, no high frequency pulses, so I'm not quite sure, if the results are okay. The pulses were very short and there was no ringing, just very short spikes. I suspect that the igniter could be the problem, but it could also be the tube itself.
What do you argon laser specialists out there think about the failure? Could it be that the igniter hv-transformer has a shorted winding or something like that?
Any help or hint or schematic is very much appreciated! :beer:
Thanks for reading this and a nice weekend
argon
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