How to date my Recto

[Key]

I am new to this forum and there is allot of great info to be found here. I just bought a Triple rectifier today and I have no idea what year it is. If you could give me a site or something so I can look it up that would be great. I used the search button with no luck. The serial is R-020911

 

[Elpelotero]

unscrew the chassis and look for the handwritten date in marker.

 

[scottm]

sounds like a 3ch from 2000 or 2001. i dont think 3ch's had the date written in them like the 2ch's did.