New Sticky on Universal Power Supplies?

[rikiheck]

Can I suggest a new sticky with links to info on building the Universal Power Supply for different voltages, etc? There is a lot of info about that here, but it is very hard to find. E.g., the new Korg B1 needs a unipolar +24V, and I'm sure there must be some info about how to get that from the 'UPS', but where? (Yes, I know I can just use a wall wart. It's an example.)

 

[2 picoDumbs]

The diyaudio store sells 24V Meanwell supplies

 

[rikiheck]

Yes, there are always those sorts of options. But 24V was just an example. And if one wants to do a PS based upon the 'UPS', then one has to hunt the forums for the info that the BOM doesn't supply. It'd be nice to have that all in one place (or linked from one place).

 

[2 picoDumbs]

I think 6L6 may have put together a build thread for the universal power supply
They could add that to the sticky threads

 

[rikiheck]

Yes, there is a build thread here, and a generic BOM here. But neither of those does what I'm suggesting, which is to collect info on different ways of building the UPS for different voltages.

 

[2 picoDumbs]

It's not any different. You just buy a different transformer with different secondary voltages.

 

[Bones13]

1.4

 

[rikiheck]

OK!

 

[Ben Mah]

Generally the VDC at the output of the PS under load is about 1.25 to 1.3 times the VAC of the secondary if the typical square rectifier bridges and 4 x .47 Ohm resistors are used. That will typically apply to Class A amplifier power supplies. If you have low current demand, the output voltage may be higher, depending on your transformer specs.

Also be sure that the electrolytic capacitors' voltage rating is higher than the output voltage.

 

[AudioSan]

And the UPS board is a dual single rail supply. It only becommes a bipolar supply when you solder in the links between the 2 halfs.