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"Explain Like I'm 5": Audio Transformers – DIY Recording ...
https://www.diyrecordingequipment.com/blogs/news/explain-like-im-5-transformers#:~:text=The%20most%20common%20core%20materials%20for%20audio%20transformers,more%20expensive%2C%20with%20less%20hysteresis%20than%20steel%20cores.
Audio Transformer - Engineers Garage
https://www.engineersgarage.com/audio-transformer/
The most commonly used audio transformer core materials are M6 steel (a steel alloy containing 6% silicon) and 49% nickel or 84% nickel (alloys containing 49% or 84% nickel plus iron and molybdenum). Nickel alloys are substantially more expensive than steel but being high permeability materials require lesser number of turns.
High quality audio transformers - AEE
https://www.aeetransformers.com/products/audio-transformer.html
Output transformers are available in the following materials: EI core; C core ; Amorphous core . Option: Output transformers with silver wound on the secondary side in combination with amorphous core. Power transformer: EI core; C core . Choke coils available in the following materials: EI core; C core ; Amorphous core; Versions: Open version, mounted on brackets
Audio Transformers
https://www.jensen-transformers.com/wp-content/uploads/2014/09/Audio-Transformers-Chapter.pdf
Audio transformers must utilize both high-permeability cores and the largest practical number of coil turns to create high primary inductance. Coil inductance increases as the square of the number of turns and in direct proportion to the permeability of the core and can be approximated using the formula: L = 3.2 N28 ì A / 10 R
"Explain Like I'm 5": Audio Transformers – DIY Recording ...
https://www.diyrecordingequipment.com/blogs/news/explain-like-im-5-transformers
The most common core materials for audio transformers are M6 steel (steel with a bit of silicon) and nickel/iron alloys. Cores with high nickel content are more permeable and more expensive, with less hysteresis than steel cores.
transformer core material - diyAudio
https://www.diyaudio.com/forums/parts/304391-transformer-core-material.html
Which core material for 44,1kHz fixed frequency toroidal transformer ? Bernhard: Parts: 1: 29th October 2008 02:17 PM: Trying to find specs on transformer core material: nhuwar: Tubes / Valves: 7: 16th June 2007 01:29 AM: Transformer efficiency - Z-11,H-14, c-core, r-core , toroidal: flyboi: Parts: 23: 4th May 2006 01:03 PM
Power Transformers for Audio Equipment | audioXpress
https://audioxpress.com/article/Power-Transformers-for-Audio-Equipment
The voltages required for the rest of the system are generated in “secondary” windings. All the windings are placed on a “core” made of an iron alloy. This is done because the permeability, or magnetic conductance, of iron is much higher than that of air, which allows a transformer to work much more efficiently.
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