10-12-2014, 04:18 AM
I have begun to work on the 41-81T I snagged on eBay. I started by disassembling the battery. This proved much easier than I had imagined. One end of the cardboard outer case of the battery just opened right up, held in place by two tabs, very neat. Then all the guts including the connector can be removed as a unit. As you can see in the pictures, the connector is in good shape and can be used again.
[Image: https://38.media.tumblr.com/bea722d6809f...1_1280.jpg]
[Image: https://38.media.tumblr.com/215499ce484a...2_1280.jpg]
I counted 41 cells in the B battery section. This means the B voltage was 61.5V. The A seems to have been 4 of the old, large F cells in parallel. Looks like I may be able to use 41 AAA cells in series for the B battery part, and 6 or 8 C cells in parallel for the A supply. I have to do some eyeball and vernier measuring next.
From the looks of the inside of the battery I got this radio just in the nick of time. A few months more and the leakage you see beginning here would have eaten through the cardboard outer covering of the battery and damaged the radio itself. As it is the connector is still fine, and the guts of the battery are intact enough to easily fathom what to make for a substitute.
I wish to keep this battery project thread separate from the actual radio part of the restoration of my 41-81T. That way those whose primary interest is in making a replica battery for one of these can follow my attempt. Those whose main interest is in the radio itself can follow my work there.
[Image: https://38.media.tumblr.com/bea722d6809f...1_1280.jpg]
[Image: https://38.media.tumblr.com/215499ce484a...2_1280.jpg]
I counted 41 cells in the B battery section. This means the B voltage was 61.5V. The A seems to have been 4 of the old, large F cells in parallel. Looks like I may be able to use 41 AAA cells in series for the B battery part, and 6 or 8 C cells in parallel for the A supply. I have to do some eyeball and vernier measuring next.
From the looks of the inside of the battery I got this radio just in the nick of time. A few months more and the leakage you see beginning here would have eaten through the cardboard outer covering of the battery and damaged the radio itself. As it is the connector is still fine, and the guts of the battery are intact enough to easily fathom what to make for a substitute.
I wish to keep this battery project thread separate from the actual radio part of the restoration of my 41-81T. That way those whose primary interest is in making a replica battery for one of these can follow my attempt. Those whose main interest is in the radio itself can follow my work there.
