I just bought a philco AC/DC battery set model 41-842 code 121. So I get it home and it is missing the speaker. OK, the output trans. is there and I have a speaker to fit. I flip the chassis over and notice that there is no band switch. The dial shows two bands 190 to 545 and then 550 to 1700. There are only two knobs;off/on volume and tuning. So, where is the bandswitch? there does not seem to be anything missing, a couple of electro's have been replaced and one paper cap has one end cut so I will have to figure out where it goes. I went to nostalgiaair but they do not have the diagram. I looked up model 42-482 and it looks close, it has the same tubes and it shows a wafer switch for the bands, mine does not have extra wires going nowhere or an open spot anywhere to put a switch in. I really need a diagram or a Sam's number.