[RodB]

There's several ways to check the speaker. In these older sets the field coil will usually leave residual magnetism in the pole. If you intermittently connect a battery between the plate and screen grid of the 7B5 you should hear clicks in the speaker. That, of course, is when the cone is present. Maybe you'll hear clicks, maybe not. You should feel the voice coil moving. If this is successful, the opt and speaker are capable of producing sound. If not, then one or the other is probably defective. Use an ohmmeter at the same tube pins to test the opt primary.