Solid-state (Good Grief - Heresy !) the hv rectifier and connect its 5 Volt filament winding in series with the 6.3 volt main filament winding Miles B. Anderson, K2CBY 16 Round Pond Lane Sag Harbor, NY 11963 Tel.: (631) 725-4400 Fax.: (631) 725-2223 e-mail: k2cby at optonline.net