[Boatanchors] Homebrew Power Supply

[mac]

Let's see, this arrangement would require a transformer with a  
185-0-185 vac secondary good for at least 350ma.  No idea where to  
come up with such a unit.....
On Apr 8, 2013, at 7:26 PM, Drew P. wrote:

> 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
>
>
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