Interesting harmonic generation circuit from the 70's

[soggybag]

I remembered being intrigued by this little snippet when this topic came up years ago. I just thought of it again, years later and found it. I wonder if anyone has done anything with this idea?

[Mark Hammer]

I might.  But aw man, do I miss Ton Barmentloo (puretube).  I don't know if he's alive or dead, working or retired.

[TELEFUNKON]

alive & well (as I hear from extremely trusted sources... )

[StephenGiles]

alive & well (as I hear from extremely trusted sources... )

That's good news - where ever you are Ton, stay safe!!

[Mark Hammer]

and keep tubing.....purely, of course.