What's on the workbench?

@Robert
I got another Karen. It seems to be the earlier version.
D1, D2 are alive. So it is close to symmetric clipping.
And the other difference is that R5(minimum gain resistance) is 22k(previously 150k).

In the later version, it is possible that one of the clipping diodes is intentionally broken and R5 is increased for easy gain control.
 

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