Autoformer volume control problem

discussion of magnetic volume control design for both line and speaker levels.

merlin el mago
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Post by merlin el mago »

How to change a butt gap 20~25hY, changing the stacked lams?
dave slagle
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Post by dave slagle »

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merlin el mago
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Post by merlin el mago »

What's the inductance AVC stacked: 1-2-3-4-3-4-3-4-3-4-3-2-1?
dave slagle
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Post by dave slagle »

120 hy's or so.

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merlin el mago
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Post by merlin el mago »

Dave I prefer 20hY
dave slagle
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Post by dave slagle »

then restack them with all the E-s on one side and all the I's on the other as shown in the link above.

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merlin el mago
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Post by merlin el mago »

dave slagle wrote:then restack them with all the E-s on one side and all the I's on the other as shown in the link above.

dave
where is the link?

felipe
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Post by dave slagle »

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merlin el mago
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Post by merlin el mago »

OK I will do and let you know, thanks.
merlin el mago
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Post by merlin el mago »

Sounds better. What gauge of Cardas magnet wire do you use?

Thks
Felipe
merlin el mago
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Post by merlin el mago »

Dave, for headphones can I use this crossfeed before or after the AVC?
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dave slagle
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Post by dave slagle »

I would put it before the filter since the small cap will resonante with the primary L in the 100hz range.

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merlin el mago
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Post by merlin el mago »

Many thanks Dave.
tan_likhua
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problem use AVC with volume control preamp

Post by tan_likhua »

Hello Dave,

I try to use AVC with my preamp tube 4P1L connect to ouput transformer Lundahll LL1692A, but the gain too loud.

I attach my AVC

Thank you

Haryono
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