[Boatanchors] Homebrew Power Supply

[Drew P.]

Joe Walden wrote:

"Hello,from Joe w5jdy in Okla...   I am in the process of building a power
supply for a Multi Elmac Transmitter model AF-67 and the Receiver PRM-7....
The particular specs I need is the power transformer secondary voltage
?ac-0-?ac....  This voltage is rectified with a solid state bridge and has a 16 mfd input filter capacitor.......  I need the output voltage to be 500
vdc at 250 ma..."

I assume that the full wave bridge would be connected to the outside of the transformer's HV secondary winding, and that the bridge's negative end would be connected to common.   

With this arrangement and typical losses, 370 VAC to the full wave bridge would give you about 500 VDC with a capacitor input filter connected to the bridge's positive terminal. With the center tap connected to another capacitor input filter, that other filter will show about 250 VDC.

Drew