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Hello, lemartien,
what about me: I am still waiting for my tube from China )) And also we decided to order the factory tube, i.e. not Reci. This is because we asked the supplier to send us the pic...

Hello Rinconchuck!

You are absolutely right about all 3 points. Unfortunately I do not have this huge resistor. But fortunately I found a good supplier who sold me Reci tube and HVPS with a good...

and coming back to frequency question: I think this guy from another forum is mostly close to the subject, see below:

Typical power supply for a glass tube laser has two main basic control inputs....

Hello, rinconchuck!
Thank you for your prompt reply. Actually my situation is like: my X700 RedSail was graving a stamp and during that process the laser disappeared. I have X700 for almost 2 years,...

Hello, rinconchuck!
I am going to change my X700 redsail factory 60W laser tube to 80W Reci tube. And I heard that Reci Power Supply will need some frequency modulation setting. Do you know...