I'm going to make one of the amps out of the book "High power audio amplifier construction manual" by G Randy Slone (which you can by from parts express) I wish i could show the schematic, but i do not have a scanner.
It does say that i do need a power supplie that would diliver +42vdc and -42vdc. Can someone please help me with a schematic for this. I was just going to use a transformer from digikey like this http://www.digikey.com/scripts/DkSearch/dksus.dll?Filter
And then rectify that to get dc output.
Anyideas?
It does say that i do need a power supplie that would diliver +42vdc and -42vdc. Can someone please help me with a schematic for this. I was just going to use a transformer from digikey like this http://www.digikey.com/scripts/DkSearch/dksus.dll?Filter
And then rectify that to get dc output.
Anyideas?
Hi,
30-0-30 or 30-0 & 30-0 will give you about +-42Vdc
You can use either a centre tapped secondary or combine a twin secondary to make an equivalent to centre tapped.
This will give about 50W to 70W into 8ohms. or nearly double this into 4ohms IF the amplifier AND power supply are optimised to drive a 4ohm load.
Some builders recommend using a dual rectifier PSU. Each rectifier fed from an independant secondary winding (twin secondary transformer) feeding a smoothing capacitor and then combining the common 0v from the caps to form the 0v reference for the rest of the amplifier. I have found the single rectifier version to perform just as well for domestic sized amplfiers. There is an advantage with very large PSUs in using dual rectifiers (they run cooler) but stay simple.
I DO RECOMMEND a separate rectifier and smoothing bank to power each channel.
Have a look at the ESP site for good background and some very informative practical project building.
30-0-30 or 30-0 & 30-0 will give you about +-42Vdc
You can use either a centre tapped secondary or combine a twin secondary to make an equivalent to centre tapped.
This will give about 50W to 70W into 8ohms. or nearly double this into 4ohms IF the amplifier AND power supply are optimised to drive a 4ohm load.
Some builders recommend using a dual rectifier PSU. Each rectifier fed from an independant secondary winding (twin secondary transformer) feeding a smoothing capacitor and then combining the common 0v from the caps to form the 0v reference for the rest of the amplifier. I have found the single rectifier version to perform just as well for domestic sized amplfiers. There is an advantage with very large PSUs in using dual rectifiers (they run cooler) but stay simple.
I DO RECOMMEND a separate rectifier and smoothing bank to power each channel.
Have a look at the ESP site for good background and some very informative practical project building.
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