Your transformer is:
Primary, 117 VAC
Secondary, 6.3 VAC @ 1.0 A
250 VAC C.T. @ 25Ma
The output of the transformer will always be AC. You will always have to rectify the AC into DC, and then filter the DC, which will contain AC ripple, to make a pure ripple free DC for the radio circuits. The DC output will be about 1.4 times the AC RMS value without load. There is a site called "Bunker of Doom" that has many transformer and tube handbooks you might be interested in visiting.
Lewis
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