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Select type of filter
Select the type of filter to be used for your power supply:
- C filter sets up a filter block just using a capacitor. You would typically only use this as the first filter (it's actually illegal to
run the C filter after any other type of filter).
- RC filter sets up a filter block consisting of a resistor followed by a capacitor.
- LC filter sets up a filter block consisting of an inductor followed by a capacitor. This would have been the normal filter block in amplifiers from
70+ years ago, as the filter capacitors would not have been high value and needed all the help they could get. Please bear in mind that any inductance you specify
is the inductance while the choke is carrying DC current. This is likely to be significantly lower than the inductance when there is no current being passed.
- Current tap is not actually a filter at all, it just provides a means for you to take current out and more than one point in the filter chain.
For example, you could take 100mA out for some power tubes, 15mA out later in the chain to power the screen grids, and 20mA at the end to power a preamp.
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