hey guys,
i'm looking for a quality stereo pot for use with my lm3886 amp. 20-50K should be fine I just want something that is very long lasting and pretty closely matched.
also must be panel mount
i'm looking for a quality stereo pot for use with my lm3886 amp. 20-50K should be fine I just want something that is very long lasting and pretty closely matched.
also must be panel mount
You can also try me...
I have a couple of Dual 25K's.
One is made by Alps (Smaller) and the other by Noble (Larger)
Alps is $4.95ea and the Noble is $5.95ea
Steve @ Apex Jr.
These are not listed on the website but in stock.
I have a couple of Dual 25K's.
One is made by Alps (Smaller) and the other by Noble (Larger)
Alps is $4.95ea and the Noble is $5.95ea
Steve @ Apex Jr.
These are not listed on the website but in stock.
TheTubeOA3...
Not sure but took down part numbers:
The Alps is a 426N 25K MN and measures 3/4" W X 1" D X 5/8" Tall
metal and plastic body
The Noble is a 220Y 25KX2 and measures 1" W X 1" D X 1 1/8" Tall
all plastic body
HTH
Steve @ Apex Jr
Not sure but took down part numbers:
The Alps is a 426N 25K MN and measures 3/4" W X 1" D X 5/8" Tall
metal and plastic body
The Noble is a 220Y 25KX2 and measures 1" W X 1" D X 1 1/8" Tall
all plastic body
HTH
Steve @ Apex Jr
Audio taper?
panel mount?
shaft dimensions?
can't turn up any data sheets googled www.nobleusa.com 220y 25kx2
panel mount?
shaft dimensions?
can't turn up any data sheets googled www.nobleusa.com 220y 25kx2
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Infinia...
Taper I do not know
Panel Mount
3/8" Bushing
5/8" long metal shaft
1/4" Shaft
There not expensive and probably worth a try
Steve @ Apex Jr.
Taper I do not know
Panel Mount
3/8" Bushing
5/8" long metal shaft
1/4" Shaft
There not expensive and probably worth a try
Steve @ Apex Jr.
thanks
audio taper is about 20% of max resistance at center
linear is 50% at center
mismatch between the 2 sections seperates the Quality from the chaff
say at 1/4 and 1/2 positions
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Infinia...
Call me, 818 248-0416
These pots have dual 4 pin connections, maybe you can help
me finding out how to check for the taper.
Alps only have a dual 3 pins.
Steve @ Apex Jr.
Call me, 818 248-0416
These pots have dual 4 pin connections, maybe you can help
me finding out how to check for the taper.
Alps only have a dual 3 pins.
Steve @ Apex Jr.
Going by Infinia's previous description:
Set the 25K pot to halfway, and use a multimeter to take a resistance reading.
If it reads 12.5K it is linear, if it reads 5K it is audio taper.
Use the pins that show a range of 0 - 25K when the pot is rotated clockwise.
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OK...
Didn't work.
Pot has a center detent
0 0 0 0
using the bottom row
pins 2 and 3 in center detent is 25K
pins 2 and 3 all the way to the right 25K
Pins 2 and 3 all the way to the left 5 ohms - 7 ohms
Also in center detent I get 25K withs pins 1 and 3
Didn't work.
Pot has a center detent
0 0 0 0
using the bottom row
pins 2 and 3 in center detent is 25K
pins 2 and 3 all the way to the right 25K
Pins 2 and 3 all the way to the left 5 ohms - 7 ohms
Also in center detent I get 25K withs pins 1 and 3
When choosing pots I always found that a linear pot used with a law faking resistor gives a good performance. Also if you don't like the attenuation slope you can always change the value of the law faking resistor to give you more adjustment at your preferred listening level.
Personally though I use a stepped switch attenuator - limited adjustment - hair shirt etc, but once listened to its hard to go back🙂
Apex jr
looks like you have a linear 50K pot. to use this as a volume control try putting a 5 to 10K resistor between the centre wiper pin and the ground pin.
Personally though I use a stepped switch attenuator - limited adjustment - hair shirt etc, but once listened to its hard to go back🙂
Apex jr
looks like you have a linear 50K pot. to use this as a volume control try putting a 5 to 10K resistor between the centre wiper pin and the ground pin.
Hi Steve
on 4 pins/section pots usually 1 of them is a dummy
you should be able to find the wiper easily as its resistance changes in relation to the outer 2 that stay at a fixed resistance of 25K. note this
Q for you on these 2 pots then
Alps 3 pins per section no detent?
Nobel 4 pins/section with center detent?
this should explain everything (see figure 4 here) wiper center is at 120 degrees on chart
on 4 pins/section pots usually 1 of them is a dummy
you should be able to find the wiper easily as its resistance changes in relation to the outer 2 that stay at a fixed resistance of 25K. note this
Q for you on these 2 pots then
Alps 3 pins per section no detent?
Nobel 4 pins/section with center detent?
this should explain everything (see figure 4 here) wiper center is at 120 degrees on chart
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my APT-Holman preamp has a stepped attenuator. I think 32 pos?
I like it, but not really necessary for this amp project.
I like it, but not really necessary for this amp project.
central detent... thinking its a balance control thingy
If it's 50K he should of measured that already
maybe one pin is fixed halfway?
"you can always change the value of the law faking resistor" I think so ...that's probably what most of the manufacturers do (so a linear would be the most flexible to get IMO)
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"call me crazy but cheapo carbon pots sound great to me...!"
Not looking for a sound difference. conductive plastic ones are said to be far more durable.
Not looking for a sound difference. conductive plastic ones are said to be far more durable.
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