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Class D Switching Power Amplifiers and Power D/A conversion

Pot for T2024
Pot for T2024
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Old 4th August 2009, 01:31 PM   #1
cpu8088 is offline cpu8088
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Join Date: May 2006
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Default Pot for T2024

I have been using a cheapo pot 50K log.

Recently I changed to one as shown in photo. Same 50K but linear. When at minimum volume both are at 7o'clock, but at listening level the old one was at 9-10 o'clock while the new one at 1-2 o'clock.

Should I worry? The new one sounds smooth and nice.

Click the image to open in full size.
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Old 7th August 2009, 01:57 AM   #2
gychang is offline gychang  United States
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Join Date: Feb 2005
Location: Davis, California
Default Re: Pot for T2024

Quote:
Originally posted by cpu8088
I have been using a cheapo pot 50K log.

Recently I changed to one as shown in photo. Same 50K but linear. When at minimum volume both are at 7o'clock, but at listening level the old one was at 9-10 o'clock while the new one at 1-2 o'clock.

Should I worry? The new one sounds smooth and nice.

Click the image to open in full size.

Tangent recommends "log or audio" rather than "linear" for amp use.

http://tangentsoft.net/elec/movies/tt15.html

gychang
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Old 8th August 2009, 09:26 AM   #3
cpu8088 is offline cpu8088
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from the graph shouldnt it be the opposite? meaning the old one output like linear while the new one like log?

Click the image to open in full size.
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Old 8th August 2009, 10:03 AM   #4
quadtech is offline quadtech  India
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Join Date: Oct 2007
If you want, you can create a psuedo-log pot using the linear potentiometer.

http://www.geofex.com/Article_Folder...s/potscret.htm

http://sound.westhost.com/project01.htm
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Old 8th August 2009, 01:32 PM   #5
gychang is offline gychang  United States
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Join Date: Feb 2005
Location: Davis, California
I am looking for a reasonable priced pot for TA2024, how much did u pay for this? Wonder if the same vendor has nonlinear one.

gychang
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Old 9th August 2009, 01:09 AM   #6
cpu8088 is offline cpu8088
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i paid us$17 thru flea bay excluding postage
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Old 9th August 2009, 01:18 AM   #7
cpu8088 is offline cpu8088
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thanks quadtech

good read indeed
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