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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: A question about your measurements (Paul and hennfarm) posted by Triode_Kingdom on October 13, 2016 at 14:49:30:
My measurements are made with a variable DC current plus about 12vRMS at 60Hz.
FWIW, I figure that when the current is enough to reduce the inductance by 20% relative to zero DC current, that's a practical maximum-current specification for output transformers and plate chokes. I base this on my measurements of a fairly large number of commercially-available SET transformers and chokes.
Measured inductance will increase if a higher AC voltage is applied, or if a lower frequency is used, as long as the flux is below the saturation level. A higher frequency (such as 1000Hz, widely used in multimeters) or a smaller voltage will give a smaller inductance.
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Follow Ups
- RE: A question about your measurements (Paul and hennfarm) - Paul Joppa 16:43:53 10/13/16 (2)
- RE: A question about your measurements (Paul and hennfarm) - dave slagle 17:45:13 10/13/16 (0)
- RE: A question about your measurements (Paul and hennfarm) - Triode_Kingdom 17:00:51 10/13/16 (0)
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