[Ron Ramirez]

Sorry, my switches arrived two days ago but I've been very busy with my custom-built 97 project which is now complete.

Here is a back view of the switch, showing the contacts and description of each:

[Image: http://i326.photobucket.com/albums/k420/...rminal.jpg]

Now, a schematic of the same switch:

[Image: http://i326.photobucket.com/albums/k420/...switch.jpg]

When the switch is in the "off" or first (1) position, nothing is making any contact. When turned clockwise to the second position, the AC switch makes contact, and the two wipers connect to each of the terminals labeled "2." Finally, when the switch is rotated one more position to the right to the third position, the two wipers now connect to each of the terminals labeled "3." The AC switch remains "on" in positions 2 and 3.

For use as a tone control in Philco models such as the 37-61, only one of the wiper terminals is used, along with the corresponding "2" and "3" contacts. In other words, use the "2" and "3" contacts that are next to the wiper terminal being used. The wiper is connected to ground, nothing to terminal 2, and the proper ends of condensers (40) and (41) are both connected to terminal 3.

This switch should also make an excellent replacement for the off-on-band switch in models 19 and 89 as well as some versions of models 14 and 91.

Note: These switches are supplied without mounting nuts. (At least, my five switches do not have any mounting nuts with them.) However, proper nuts and lockwashers for these should not be difficult to find.