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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: RE: Is The Last Cap In The PSU Still Important... posted by JKT on April 24, 2015 at 14:15:15:
Obviously I do need to read the article. I never would have guessed that the roll off starts so low in the bandwidth. I thought that the cascode topology ameliorated the effect of device capacitance on hf impedance, for all practical purposes. Meantime, I am using two of the K&K regulators where I once used Vacuum State Super-Regulators, and the K&K do seem to be an upgrade. Do you think it would be worthwhile for me to switch over to the lower voltage MOSFET that you mentioned above? (I'm way below 500V in and out.)By the way, where does the "crap" come from? I thought the issue is that the CCS simply loses impedance at very high frequencies because of device capacitance. This could make it more important to use good quality filtering before the CCS, but when you use the term "crap", I am thinking the issue is spurious "noise".
Edits: 04/26/15
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Follow Ups
- RE: Is The Last Cap In The PSU Still Important... - Lew 09:00:33 04/26/15 (1)
- RE: Is The Last Cap In The PSU Still Important... - JKT 13:20:38 04/26/15 (0)
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