Power supply bigger than suited for tube?

[neo__04]

Hey all.

I'm doing a build and will use a cheap 40w tube to get things up and running, when i have all the bugs ironed out i'll get a bigger laser in the range of 60-80w. If i buy an 80w power supply now, will i kill the 40w tube? Just trying not to buy 2 tube and 2 power supplies. Thanks!

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[dgeorge]

Use Ammeter. Limit current by potentiometer on PSU to 18mA max. Have fun.

[Art_HeatSign]

Hey all.

I'm doing a build and will use a cheap 40w tube to get things up and running, when i have all the bugs ironed out i'll get a bigger laser in the range of 60-80w. If i buy an 80w power supply now, will i kill the 40w tube? Just trying not to buy 2 tube and 2 power supplies. Thanks!

Hello.
Yeah, you can use the 80w power supply with the 40w tube.
However, you'd need to use a potentiometer to control the voltage level. That will make it suitable for your tube.