Dusl 1237 platter cupped?

[flasher1]

Has anyone ever put a straightedge across the top of a platter? I did that on a Dual 1237 today and was surprised to see how much lower the platter was in the center.
Can anyone with a Dual 1237 put a 12” ruler across the platter and let me know what you find. The platter on this 1237 has the strobe marks on the outside edge.
Many thanks,

 

[Doug G.]

It's supposed to be cupped so the only thing touching the platter is the center of the record and the outer edge. It saves the playing groove that way.

Doug

 

[Poinzy]

That's the way it is with my Dual 1229. Last time I checked, the center of the platter cleared the straightedge by something like 3/16".

 

[flasher1]

That's the way it is with my Dual 1229. Last time I checked, the center of the platter cleared the straightedge by something like 3/16".

That’s measured on the top of the platter or mat? And thank you for checking.
If that is the case l, I guess the arm is not descending properly.