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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Operational Photos posted by Triode_Kingdom on December 7, 2016 at 09:39:21:
Nice shots! That switcher seems to be behaving in exactly the way one might have hoped!In the final example, without the filter capacitor, the envelope of the HF oscillations is amazingly close to the ideal for a rectified sinusoidal supply. Now it is really quite easy, in both the unfiltered case and the filtered cases, to estimate the true rms voltage. Since the HF voltage, in your first shot, is a pretty good approximation to a square wave, one simply has to use the envelope seen in the low-frequency traces in order to compute the rms value. A slightly more refined calculation could also be done, where one first allows for the not quite square wave nature of the HF waveform and does an rms averaging over that, and then afterwards a low-frequency rms averaging.
It is interesting, by the way, that one can see how the HF oscillations fire up once some critical voltage is reached in the rectified mains sinewave. And then on the downward portion of the sinewave segments the HF oscillations continue almost until the sinewave gets to zero.
Nice!
Chris
Edits: 12/07/16
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- RE: Operational Photos - cpotl 12:18:59 12/07/16 (0)
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