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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: RE: Can someone explain "primary inductance" of an output transformer? posted by engineer@baymoon on August 22, 2024 at 10:14:51:
In an open loop system, the plate resistance working against the primary inductance sets your low frequency roll off frequency. When you add feedback this "small signal" roll off frequency can be pushed to a lower frequency, BUT, but you still have to drive the large signal response to get the power to the speaker.
When the XL (2 pi F inductance) of the transformer is less than the reflected load impedance, the tube will have to push more current into the transformer for the same voltage to the speaker. This extra drive can lead to various forms of distortion. This is part of the large signal response.
Play safe and play longer! Don't be an "OUCH!" casualty.
Unplug it, discharge it and measure it (twice) before you touch it.
. . .Oh!. . .Remember: Modifying things voids their warranty.
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Follow Ups
- RE: Plate Impedance wrt to Primary Inductance - VoltSecond 21:52:53 08/22/24 (2)
- RE: Plate Impedance wrt to Primary Inductance - Paul Joppa 08:38:46 08/23/24 (1)
- There are tubes that aren't triodes? :-) - Tre' 18:54:05 08/26/24 (0)
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