with a 12.6-0-12.6 winding ( from the 25.2vac/2A TX ), two diodes for a full wave rectifier, ground the CT to the capacitor's negative rail( 4700 uF/25 volt ). put a resistor between the cap and the diode's cathode's ( the banded end, the other goes to the 12.6 vac ends of the TX winding ). 5R is a good value. make another R-C section with a 3R resistor and terminate with another 4700 uF cap. OUtput ought to be close to the desired 12.6v. Up to 13 is OK.

The 5R ought to be a 5W wire wound. The other R ought to be similar construction. I'll draw something up if another solution does not appear. Search on full wave with google, it ought to give you a reasonable staring point. I think I linked to this earlier in a discussion of the power supply.

Don't get your solder in a knot, we'll get this straightened out.
regards,
Douglas

Thanks again for all your help. This is really getting to be fun. It exciting to see all the boxes show up at the doorstep. I am, however, having a hard time explaining to my wife why all the "empty" boxes are showing up. I think she's beginning to catch on.....Colin