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The characteristics of valves as gain devices have direct implications for their use as audio amplifiers, notably that power amplifiers need output transformers (OPTs) to translate a high-output-impedance high-voltage low-current signal into a lower-voltage high-current signal needed to drive modern low-impedance loudspeakers (cf. transistors ...
However, a transformer may include a tap changer on each winding if there are advantages to do so. For example, in power distribution networks, a large step-down transformer may have an off-load tap changer on the primary winding and an on load automatic tap changer on the secondary winding or windings. The high voltage tap is set to match long ...
Transformers are also used in DI boxes to convert high-impedance instrument signals (e.g., bass guitar) to low impedance signals to enable them to connect to a microphone input on the mixing console. A particularly critical component is the output transformer of a valve amplifier.
1.25 V or 1.4 V AC from a separate heater winding on CRT horizontal-output transformers, in half-indirectly heated EHT rectifiers; E – 6.3 V parallel heater; for 3-cell lead-acid vehicle crank batteries (mobile equipment) and for AC mains or horizontal-output transformers; F – 12.6 V DC parallel heater for 6-cell lead-acid vehicle crank ...
One can observe that the output stage of the successful McIntosh amplifier is a circlotron too because the special winding of the output transformer eliminates one of the two floating power supplies. The concept was resurrected in its transformerless form in early 1980s by Ralph Karsten , founder of Atma-Sphere , which remains the principal ...
Nickelodeon is continuing its tradition of broadcasting an NFL playoff game in 2025. Here's how to watch the broadcast for the Texans-Chargers game.
Williamson was confident that the output transformer is the most critical component in any valve amplifier. [24] Even before applying global feedback, the transformer is liable for at least four types of distortion. [24] Their causes cannot be addressed simultaneously, and the designer must make a compromise between conflicting requirements. [24]
The new labels rules, for instance, add salmon, eggs, olive oil, nuts and whole grains to the list of "healthy" foods and remove foods with high amounts of added sugars.
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