Comments on: Audio isolation transformers https://www.epanorama.net/blog/2010/08/12/audio-isolation-transformers/ All about electronics and circuit design Wed, 13 May 2026 18:55:00 +0000 hourly 1 http://wordpress.org/?v=3.9.14 By: Tomi Engdahl https://www.epanorama.net/blog/2010/08/12/audio-isolation-transformers/comment-page-2/#comment-1876736 Sun, 26 Apr 2026 17:30:15 +0000 http://www.epanorama.net/blog/?p=2273#comment-1876736 First 1:1 audio transformer, 10k/10k, hand-wound in the workshop.

it was time to venture into the mysterious world of in-house winding. This is a solid first step.
First successful test after three failed winding attempts.
Configuration:
Simple primary and secondary windings
Same winding direction (co-directional)
Measured performance:
Inductance: 15 H @ 100 Hz
+18 dBu at 1% THD @ 50 Hz
This results in a strong low-frequency response.
High-frequency performance can likely be improved by optimizing winding direction, adding an electrostatic shield, or using interleaved (sandwich-style) windings.
These parameters will directly impact parasitic capacitance, bandwidth, and coupling between windings.
In short, the possibilities are endless, with a significant amount of testing ahead.
There’s still a lot of work to do, but I’m definitely on the right track.
https://www.facebook.com/share/p/1Kv79zSZF2/

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2010/08/12/audio-isolation-transformers/comment-page-2/#comment-1866359 Tue, 02 Dec 2025 22:05:37 +0000 http://www.epanorama.net/blog/?p=2273#comment-1866359 Confused! We speak about Hi-Fi but are happy with adding distortion, pleasant sounding or not?

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2010/08/12/audio-isolation-transformers/comment-page-2/#comment-1866358 Tue, 02 Dec 2025 22:04:53 +0000 http://www.epanorama.net/blog/?p=2273#comment-1866358 Magnetization follows the “hysteresis” curve which creates a non linear response in the transformer.

This creates second order harmonic distortion which sounds “warmer.”

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2010/08/12/audio-isolation-transformers/comment-page-2/#comment-1866357 Tue, 02 Dec 2025 22:04:00 +0000 http://www.epanorama.net/blog/?p=2273#comment-1866357 https://www.facebook.com/share/v/1ANfhmHC9S/

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2010/08/12/audio-isolation-transformers/comment-page-2/#comment-1852557 Sat, 26 Apr 2025 10:06:52 +0000 http://www.epanorama.net/blog/?p=2273#comment-1852557 https://www.sescom.com/products/view/category/categoryslug/il-19-hum-eliminator-series
https://www.locationsound.com/sescom-il-19-inline-pro-audio-hum-eliminator-739

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2010/08/12/audio-isolation-transformers/comment-page-2/#comment-1827026 Tue, 07 May 2024 06:39:29 +0000 http://www.epanorama.net/blog/?p=2273#comment-1827026 #1851 Linear Optocoupler (part 3 of 3)
https://www.youtube.com/watch?v=43D0El4MlNM

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2010/08/12/audio-isolation-transformers/comment-page-2/#comment-1827025 Tue, 07 May 2024 06:38:14 +0000 http://www.epanorama.net/blog/?p=2273#comment-1827025 #1849 Linear Optocoupler (part 1 of 3)
https://www.youtube.com/watch?v=QmySXQMZ2TY

https://docs.broadcom.com/doc/HCNR200-HCNR201-High-Linearity-Analog-Optocouplers-DS

]]> By: Radhika https://www.epanorama.net/blog/2010/08/12/audio-isolation-transformers/comment-page-2/#comment-1826208 Wed, 24 Apr 2024 05:21:59 +0000 http://www.epanorama.net/blog/?p=2273#comment-1826208 Voltage stabilizer is a one of the most crucial part to regulate the electric fluctuation across to protect all electrical equipment but not every voltage stabilizer comes with isolation transformer. An isolation transformer isolates the circuit from main ac supply and serves the product with longer life.

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2010/08/12/audio-isolation-transformers/comment-page-2/#comment-1819302 Sun, 10 Dec 2023 09:31:59 +0000 http://www.epanorama.net/blog/?p=2273#comment-1819302 Inside an audio isolator transformer module
https://m.youtube.com/watch?v=fV_hsFK1MnA&fbclid=IwAR1zbBOA3YtDofoJP1gdWs24qxU0iaAl0DxIBPPdNGia8iTkKGilLKldH44

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2010/08/12/audio-isolation-transformers/comment-page-2/#comment-1816536 Sat, 28 Oct 2023 10:20:22 +0000 http://www.epanorama.net/blog/?p=2273#comment-1816536 the downside of the transformer is that it changes the sound more or less depending on transformer design and many other details. Change of sound can sometimes used as intended effect.

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