I don't recall in your prevous posts whether you have a solid state power supply or tube rectifiers. The B+ inrush with the silicon diode modification will be huge. Cheers, Gord VE3EOS -- Gordon L. Hayward, Ph.D., P.Eng., Associate Professor, Biological Engineering, School of Engineering, University of Guelph, Guelph, Ontaro, N1G 2W1.