[captainclock1988]

Actually that transfomer is tapped, but probably not center tapped as you would have with push-pull out put tubes. There is a winding that appears to be used as a smoothing choke. If you replace the transformer, alternative arrangements will need to be made for the line of the supply that goes the the RF and detector circuits.

Cheers
Ed

Thanks for the information, it seems finding a replacement transformer might be a little tricky for this radio as the specs for it in the Rider's are not given in the parts list, just some resistance readings on the schematic and that's it.