[ARC5] Receiver AC Power Supplies

[Jim Wiley]

Wayne -

Yes, that is correct.  The transformer can provide a total of 50 watts 
(approximately).

So a full-wave center-tap rectifier could produce roughly 12-volts at 
about 4 amps, where a full-wave bridge will make roughly 24 volts at 
about 2 amps.

The nominal 12-volt output voltage using the half-wave will be a bit 
higher, percentage wise,  than the nominal 24-volt voltage, since the 
bridge rectifier has 2 more diodes, with their attendant voltage drops,  
to deal with than does the full-wave center tap configuration.  
Depending on diode type ( Germanium, Schottky barrier,  or conventional 
silicon construction), each diode will drop between 0.3 and 0.7 volts.   
Conventional silicon diodes are most common.  Schottky barrier are next, 
with Germanium becoming obsolete and hard to find.

- Jim, KL7CC


On 12/12/2014 6:28 AM, Robert Eleazer wrote:
>
> By the way, that raises a question.  I think I knew once, but when they say a center tapped transformer has 2 amps of output, do they mean that it can provide 25.2VAC at 2.0 amps, which would be 12.5 VDC at 4 amps if connected for full wave rectification?
>
> Wayne
>