If you've got the iron, I'd build up a 2kVDC supply, to run at 250mA on the final, for 500w DC Input to the final. at those voltages, you don't need nearly as big of value components as you would if you were running 4kV on a pair of 450's in the final.
Of course, build for reserve ;-) Variac the thing, make the current handling capability double, and make it 2500v. Got an old BC-610 plate transformer laying around? Double up on the modulator supply for the 450T's. You're going to need 3 or 4kVDC. Pay attention to your DC power supply, think about things like critical inductance, capacitors rated for 1.5x the B+ level and so forth I''ve just gone through all that here, trying to design a (yet another) power supply for my rig. A Power supply for a Class AB(1) or AB(2) or Class B requires a -lot- more thought be put into it, than say one for a Class C circuit, that will -always- have a decent amount of current being drawn through it. Got any Swinging Chokes? ;-) -- Operating your AM rig without a scope is like driving our car at night without headlights.(~K4KYV) 73 = Best Regards -Geoff/W5OMR ______________________________________________________________ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected]
