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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: A different comparison... posted by Tre' on February 5, 2022 at 07:19:00:
PSUD is excellent for basic functionality, such as output voltage and ripple. It's limited though, and clearly not useful for this exercise. You only need to probe a choke-input filter with a scope to see this phenomenon. LOL, the guitar amp I built recently reminded me of this when I accidentally forgot to install the wire to the first filter cap of the CLC filter. The choke was only 0.5H, but it radiated into the amplifier and created a loud buzz. Power supply output was still clean, but the EMI was everywhere.EDIT: It should be obvious why this happens when it's considered that the rectifier is looking into a high impedance. Average DC flows through the choke, but the AC component is effectively unloaded, and it "kicks" the choke (and the power transformer) as the diodes turn on and off. I'll just add that the example above used a 5AR4 rectifier. There were no solid state diodes switching on and off.
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Follow Ups
- RE: A different comparison... - Triode_Kingdom 02/5/2209:21:22 02/5/22 (4)
- I found the voltage - Tre' 09:55:27 02/7/22 (3)
- RE: I found the voltage - Triode_Kingdom 21:36:22 02/10/22 (2)
- look at the difference in the wave form - Tre' 17:12:09 02/11/22 (0)
- RE: I found the voltage - rage 05:15:32 02/11/22 (0)
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