[PAradiogeek]

Frank,

My 37-630 schematics in Rider's includes instructions for adjusting the shadow meter. Do you have anything like that for your 16B? Basically there are two adjustments that can be made. The coil can slide forward or back on the housing. Also, if I read it correctly, you also can twist the coil in one direction or another on the housing in order to get good operation of the meter. I don't really understand how the latter could affect this, but that is what the instructions said.

You might want to refer to the schematics in Rider's for another radio if yours doesn't have this informaiton. The scematics for the 37-630 are not on NA, but here is where information on the 37-640 can be found.
http://www.nostalgiaair.org/Resources/216/M0013216.htm
Consult the second page.

I hope this helps. Good luck.
Jon