[irjustin]

I'll go with occam's razor and say it was simply not removed from the development board to the full production board.

It's probably related to tuning but on a production board? Normally if you need it as part of your production process it would just be part of the tuning tool itself.

But honestly I cannot see how it would be used in production since the antenna length is determined by that point.

[kosma]

Removing the silk also de-tunes the antenna. It's cheaper to leave it there than to remove it and re-tune.

[irjustin]

Interesting! How is that? Simply mass around the antenna being removed changes the tuning?

[rkagerer]

Hah! Hadn't thought of that; thanks.