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Audio Transformer, its Types and Impedance Ratio
https://circuitdigest.com/tutorial/audio-transformer
The audio transformer works at frequencies between 20 Hz to 20 kHz. So, the operation of an Audio transformer has much wider frequency range. As discussed above, the audio transformer uses Impedance balancing technique. It is very useful for balancing amplifiers and loads (Loudspeaker and other) that use a different input or output impedances for …
AUDIO FREQUENCY TRANSFORMER IMPEDANCE
https://journals.iupui.edu/index.php/ias/article/download/4514/4430
170 ProceedingsofIndianaAcademyofScience TABLEIII CharacteristicImpedance Magnavoxoutputtransformer Ep= 1vcIt Z(el;sed) /<>=(ZXZ Cj2 ohms (Z(open)cycles ohms ohms 60 ...
Audio Transformers - Learn About Electronics
https://www.learnabout-electronics.org/ac_theory/transformers04.php
Audio Frequency (AF) Transformers work at frequencies between about 20Hz to 20kHz and are used in audio amplifier circuits, they were essential in valve (tube) designs for matching the high impedance outputs of theses amplifiers to low impedance loudspeakers, but transistor amplifiers have much less need for output transformers.
Audio Transformers for Impedance Matching
https://islproducts.com/design-note/audio-transformers-for-impedance-matching/
Audio transformers are designed to operate within the audio band of frequencies (20Hz to 20kHz) and as such can have applications in the input stage (microphones), output stage (loudspeakers), inter-stage coupling as well as impedance matching of amplifiers.
Chapter 5: Understanding Impedance In Audio Transformers
http://www.lundahl.se/wp-content/uploads/datasheets/PSW_WhitePaper_Download_Chapter_5.pdf
ImpedanceIn Audio Transformers impedance. Transmission lines and cables exhibit impedance too, but for simplicity’s sake we will not delve into them here. They represent only a relatively small factor, except when very long lines are driven by sub-optimal output stages. In such cases, the capacitive and induc-
Audio Transformers
https://www.jensen-transformers.com/wp-content/uploads/2014/08/Audio-Transformers-Chapter.pdf
1:2 turns ratio exhibited an impedance ratio of 1:4. Transformers always reflect impedances from one winding to another by the square of the their turns ratio or, expressed as a formula: Zp/Zs = (Np/Ns)2 where Zp is primary impedance, Zs is secondary impedance, and Np/Ns is turns ratio (which is the same as the voltage ratio).
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