[MrFixr55]

Hi Antipodal,

Greetings from the nice warm other side of the world. Hope that your winter is bearable. At 70 years and having arthritis, I am not exactly a winter person.

Below is a link to the 101.583.1 set:
https://www.nostalgiaair.org/pdfs/Sears-...1583-1.pdf

If the tube complement is the same as your set, I think you are close. This reminds me of a Crosley 02CA that I rebuilt the chassis on a few years ago (or at least the amp section; the RF, Convertor, IF and detector / 1st AF amp tubes are different). This appears to be a Class B output with cathode follower drivers. This should put out between 5 and 10 watts of power.

Pull the rectifier and power it up on your 117V source, and with all tubes other than the rectifiers in the socket, measure the heater voltage. If the heater voltage is approximately 6.3V give or take, then you can be sure that it is a 115-120V radio. If the cabinet sticker with the model number and tube complement still exists, this should give you some help.

If the plug is the standard US NEMA 1-15P (2 prongs parallel to each other) and there is no voltage selector switch, I would have to think that it is a 115V set. However, I think that Japan uses the same type of plug and a lot of their residential power is 100V

Hope this helps.