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4-pole Potentiometers available?
4-pole Potentiometers available?
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Old 22nd November 2005, 02:22 PM   #1
fluckscapacitor is offline fluckscapacitor  United States
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Join Date: Jul 2005
Default 4-pole Potentiometers available?

Is anyone aware of any high-quality 4-pole pots that are available w/ log taper? Something that can be board mounted would be preferred but I will look at anything available.
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Old 22nd November 2005, 02:43 PM   #2
I_Forgot is offline I_Forgot  United States
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Join Date: Jan 2005
Location: Phoenix, Az.
There are some out there, but they tend to be expensive. There are other reasons not to use them besides the cost.

I built a preamp using an expensive, high quality, conductive plastic, 4 pole pot several years ago. After using the thing for a year or so I found the individual sections started to mistrack resulting in the balance wandering as the volume changed. The preamp had a balance control which I had to use frequently (every time I changed the volume setting). I eventually got disgusted with the whole thing and swore off ganged pots for the rest of my life.

I rebuilt the thing using attenuator chips instead. They NEVER mistrack. Balance control is implemented by individually addressing the attenuator chips, so there is no need for another control.

Take a look at TI's PGA2310.

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