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Originally Posted by Les
A little confused
Have only begun analysis but seem to have discrepancy.
Dealing with 24mm diam disk and hemisphere
Disk C/W(conv)= 1/3.142x0.012x0.012x100000 = 0.0221
Hemisphere C/W(conv) = 1/2x3.142x0.012x0.012x100000= 0.01105
Giving for a 100w load
Will continue tomorrow.
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Not quite sure what you mean Les.
The chart above is for a 70W load, sorry did not note that last night.
My "hemisphere" is actually a 34mm (ish) diameter flattened top shape 12mm high. This complicates the area calculation a bit.
does that help?