Volume Attenuator Transformer - DIY?

NYCOne · 14th September 2010, 11:39 PM

I've wound many small electric motors - it's not very hard once you do a few. Has anyone seen a DIY design for winding your own volume attenuator transformer? This seems like a straight forward project, but the design part is beyond me - though I think I could wind it.

Please let me know if you're aware of any DIY transformer designs for volume attenuation.

Thanks

bob91343 · 15th September 2010, 03:47 AM

I am unsure what you are thinking about. Perhaps a transformer with switchable taps?

If you want to make a transformer for high quality audio, it's not a simple matter. You have to get a good core, calculate the inductance, then wind in a pattern that minimizes distributed capacitance. The secondary must not couple capacitively to the primary except perhaps on the 'cold' end. The impedance level will dictate the inductance; the latter must offer a high reactance at the lowest frequency of interest.

NYCOne · 15th September 2010, 04:59 AM

I was thinking autoformer or transformer for attenuation

bob91343 · 15th September 2010, 06:40 AM

My comments still apply. I suggest you read an engineering text on transformer design, in particular audio, and you will learn the parameters. I would not recommend a seat of the pants approach due to so many important factors.

On the other hand, no harm done if you want to have some fun.

14th September 2010, 11:39 PM	#1
NYCOne diyAudio Member Join Date: Jul 2010 Blog Entries: 1	Volume Attenuator Transformer - DIY? I've wound many small electric motors - it's not very hard once you do a few. Has anyone seen a DIY design for winding your own volume attenuator transformer? This seems like a straight forward project, but the design part is beyond me - though I think I could wind it. Please let me know if you're aware of any DIY transformer designs for volume attenuation. Thanks

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15th September 2010, 03:47 AM	#2
bob91343 diyAudio Member Join Date: Mar 2010	I am unsure what you are thinking about. Perhaps a transformer with switchable taps? If you want to make a transformer for high quality audio, it's not a simple matter. You have to get a good core, calculate the inductance, then wind in a pattern that minimizes distributed capacitance. The secondary must not couple capacitively to the primary except perhaps on the 'cold' end. The impedance level will dictate the inductance; the latter must offer a high reactance at the lowest frequency of interest.

15th September 2010, 04:59 AM	#3
NYCOne diyAudio Member Join Date: Jul 2010 Blog Entries: 1	I was thinking autoformer or transformer for attenuation

15th September 2010, 06:40 AM	#4
bob91343 diyAudio Member Join Date: Mar 2010	My comments still apply. I suggest you read an engineering text on transformer design, in particular audio, and you will learn the parameters. I would not recommend a seat of the pants approach due to so many important factors. On the other hand, no harm done if you want to have some fun.

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