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Old 3rd June 2004, 11:06 AM   #1
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Default 1 kohm volume pot

Hi,

I'm looking for a high quality 1kohm volume pot (log taper, dual or quad). All the good pots are high-impedance (10k and up). Has anyone seen such a device?

Bruno
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Old 3rd June 2004, 11:42 AM   #2
JohnW is offline JohnW  Hong Kong
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Hi Bruno,

Somebodys having a noise “issue”

Try Spectrol 180 Series,

Farnell P/N 307-1133 or 307-1250 1K Double Gang Log.

After major QC issues with Log Pots, the tracking between Gangs can be very poor due to the Log Taper, I now use LIN pots and an extra resistor to emulate a Logarithmic like taper – I find its Ok for most applications.

See below and original design idea:-

John
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File Type: jpg lin to log.jpg (8.6 KB, 161 views)
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Old 3rd June 2004, 11:43 AM   #3
JohnW is offline JohnW  Hong Kong
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And original design idea:-
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File Type: zip lin to log pot.zip (54.9 KB, 45 views)
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Old 3rd June 2004, 11:54 AM   #4
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Yup, that's probably going to be the soundest way out. Thanks.
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Old 20th July 2004, 11:04 AM   #5
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Hi Bruno,

Making a log potmeter with a lin potmeter + adding a resistor does not work very well due to the non linear resistance on the taper. The larger the current, the worser the effect.
Once I tried wirewound potmeters, which seems to work well exept that they are very hard to get in stereo. you need to make a mechanical connection between them to have dual or even quad configuration.
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