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Sorry to hear. But I'm using PP to send money to friends around the world. Never have faced some issues at all. Even once I got scammed by an seller -> after three weeks was refunded. Seems I'm a lucky guy.....

hi, affordable is DIY. You just need to replace the driver of any of these cheap 532nm modules by some TTL or analogue drivers available. Set current properly and around 100kHz shouldn't be an issue.

the modules are perfect for building a 589nm pointer. Just got one a couple of months ago. The module does around 20mW. But you need an additional lens to properly focus. Also the driver attached to the module is of quite bad quality (guess it’s just a linear) and heats up very quickly. Need to...

Have found some excellent instructions on how to run the heater: http://hololaser.kwaoo.me/laser/PL530.html

Yes

I'm 100% with you Paul. But give it up - you can't turn around fans of DT. Sad but true ☹️. Similar story 80 years back here in Germany. We all have to learn it the hard way.... So let's stop here.... this is a forum about lasers.... bringing people together..... all having the same passion

Awesome laser builds. Also have some plans to build my own TE nitrogen laser. But as usual time is limited (family & kids). When ever I'm on some business trip close to your home I would be happy to meet you and to see some of your projects. -mo-

US has a leader? Wasn't aware of.....

yes, ballast resistors are getting quite hot and usually placed in front of the tubes and not next to it (temperature profile along the tube). One of my 543nm has serious issues if the ballast resistors is placed to close... replacing on single ballast resistor with multiple is quite common...

impressive! very impressive! how you've managed to achieve a puls repetition rate of 12 kHz? Years ago I also tried to build a CuCl laser stuck in getting two quite fast pulses.

Had the same issue with my old Lasos LGK 7872. Was sitting for around two years and had serious issues during ignition. But after 10 or so "ticks" the laser has started. After running it for a couple of hours around 80% the issue issue got solved until today. Recommend SAMs Laser FAQ for further...

Hi Edgar, are you really sure that the driver is/was the problem? These diodes are highly sensitive to ESD e.g. diode pins are not crossed/connected when pressing or soldering leades - diode turns to LED

ignore or ban his account. done.

You may also give a try on these small glass gratings offered on eBay.... Surely no lab quality like Edmunds

seems Shenzhen Optlaser still has some of the 575nm units declared as low power units (<10mw) but not advertising them. Surely because of the issues reported / regressions.

Crazy! Amazing machine. I'm sure you'll have a hell lot of fun! Any shots @ night planned?

Seriously impressive!

Seens to be a PLTB450B diode running on max. current (rated for 1.6 W). DTR offers PLTB450B for $23. So o-like offer sounds good to me.