Potentiometer with loudness tap

noyan · 22nd March 2005, 07:56 AM

I am now building a Mcintosh C22 tube preamplifier. I need to find 800k potentiometers with loudness tap, for volume control. Any idea how to provide them?
Thanks.

Hennie · 22nd March 2005, 08:14 AM

The Vishay P11/PA11 modular series includes a centre tap option. Not available in 800K though:

See http://www.vishay.com/docs/51031/p11.pdf

Danish Audio Connect does a stepped attenuator which is available up to 500k. You can probably modify / rework this to add a loudness tap at any convenient position.

See http://www.dact.com/Attenuator_data_sheet.PDF.

noyan · 22nd March 2005, 09:46 AM

Thanks but i checked those sites and i could not see any loudness tapped pot.

Hennie · 22nd March 2005, 10:21 AM

The Vishay range I referred to definitely includes a centre tap option. It is in the data sheet. While a centre tap is not ideal, it can be made to work.

To me it looks like the DACT attenuator consists of a series resistor network. If so, it should be easy to modify it to provide a tap at a suitable position.

22nd March 2005, 07:56 AM	#1
noyan diyAudio Member Join Date: May 2004 Location: istanbul	Potentiometer with loudness tap I am now building a Mcintosh C22 tube preamplifier. I need to find 800k potentiometers with loudness tap, for volume control. Any idea how to provide them? Thanks.

22nd March 2005, 09:46 AM	#3
noyan diyAudio Member Join Date: May 2004 Location: istanbul	loudness tapped pots Thanks but i checked those sites and i could not see any loudness tapped pot.

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22nd March 2005, 08:14 AM	#2
Hennie diyAudio Member Join Date: Nov 2004 Location: Pretoria	The Vishay P11/PA11 modular series includes a centre tap option. Not available in 800K though: See http://www.vishay.com/docs/51031/p11.pdf Danish Audio Connect does a stepped attenuator which is available up to 500k. You can probably modify / rework this to add a loudness tap at any convenient position. See http://www.dact.com/Attenuator_data_sheet.PDF.

22nd March 2005, 10:21 AM	#4
Hennie diyAudio Member Join Date: Nov 2004 Location: Pretoria	The Vishay range I referred to definitely includes a centre tap option. It is in the data sheet. While a centre tap is not ideal, it can be made to work. To me it looks like the DACT attenuator consists of a series resistor network. If so, it should be easy to modify it to provide a tap at a suitable position.

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