I am looking for a transformer for my next project and i'm having trouble as to how this secondary works:
Secondary SEC I 0 - 275V - 330V / 0,4A
There are other secondary wndings on the transformer but I do not understand this format. Its not a centre tap but is it a tap between 0-330V?
What would you use it for?
Any help appreciated.
Secondary SEC I 0 - 275V - 330V / 0,4A
There are other secondary wndings on the transformer but I do not understand this format. Its not a centre tap but is it a tap between 0-330V?
What would you use it for?
Any help appreciated.
Put a bridge (+capacitor) on one set of terminals. Put a single diode (+capacitor) on the other one. Choose correctly and you have a ful-wave rectified main DC supply and a half-wave rectified auxiliary DC supply (which could even be negative, if you want).
Alternatively, just use the voltage you want and ignore the other one.
Alternatively, just use the voltage you want and ignore the other one.
But would that not produce unbalanced voltages in the secondary winding due to unsymmetrical currents flowing in the common third connection because of unbalanced loads?
It can be 275 -or- 330V.
It wants a full-wave bridge, as said.
If you just use the 275V winding, you "waste" about 10% of the copper+iron you paid for. This "waste" is small compared to the benefit of getting closer to your intended DC voltage, which is always partial guess-work due to bad sag in capacitor-input filters and incomplete specification of all parasitics.
Expect either 380VDC or 460VDC. Or less if your load is close to 400mA AC (with cap-input, about 250mA DC).
This PT can power around 50W-60W of tube-amp. 6L6 or EL34 at 4K load, for example.
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