Philco Puzzlement

[Winky Dink]

These two websites can answer all of your questions:

http://philcoradio.com/phorum/

http://www.philcorepairbench.com/

Here's a photo of a 37-665 (not mine) and a 1936 645. Philco had many versions of the shadow meter, so make sure you have the right part number if you find one.