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RE: GZ34: getting too much voltage drop

Posted by sideliner (A) on February 11, 2017 at 18:35:35

In Reply to: RE: GZ34: getting too much voltage drop posted by Tre' on February 11, 2017 at 16:07:00:

You are right, I thought more about this after I posted my last response and it occurred to me that the losses incurred in the filter from input to output can only be the resistive losses in the inductor (DCR) and/or resistors. From this realization alone it's obvious that the difference between 1.41x Vrms and 0.9x Vrms in the two types of filters is due to the topology.

The capacitor input simply charges to the peak value of the voltage waveform, hence the x1.41 factor. So to correct my earlier statement, the voltage at the output of the filter is that of the input minus the resistive losses of the chokes and resistors which of course depends on the current draw of the amp.

So, the voltage of 290V present at the rectifier's cathode is actually in line with the expected result.

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