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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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log law pots ratio?
I always thought log law was mid track resistance 10 percent of whole track.
Just come across a stereo slider in a Yamaha mixer amp labelled A10K x2 , fair enough meaning log, but mid track is 25 percent of 10K . Natural log rather than to base 10 ? 2527 |
#2
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log law pots ratio?
" Nutcase Kook = ****wit " I always thought .. ** A virtually impossibility.... log law was mid track resistance 10 percent of whole track. ** Yup. Just come across a stereo slider in a Yamaha mixer amp labelled A10K x2 , fair enough meaning log, ** Nope. but mid track is 25 percent of 10K . Natural log rather than to base 10 ? 2527 ** A = Audio Taper. C or D = log. E = reverse log. Audio taper is a marketing compromise curve that sells amplifiers. ...... Phil |
#3
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log law pots ratio?
On 29/02/2012 11:42, N_Cook wrote:
I always thought log law was mid track resistance 10 percent of whole track. No. That's D-Taper, the pot I was after. Just come across a stereo slider in a Yamaha mixer amp labelled A10K x2 , fair enough meaning log, but mid track is 25 percent of 10K . K-Taper? http://www.alps.com/WebObjects/catal...RESISTANCE.PDF Phils smoking pot again... -- Adrian C |
#4
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log law pots ratio?
"Adrian ****" Just come across a stereo slider in a Yamaha mixer amp labelled A10K x2 , fair enough meaning log, but mid track is 25 percent of 10K . K-Taper? ** FFS moron - it says " A" taper !! .... Phil |
#5
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log law pots ratio?
On 29/02/2012 19:22, Phil Allison wrote:
"Adrian ****" Just come across a stereo slider in a Yamaha mixer amp labelled A10K x2 , fair enough meaning log, but mid track is 25 percent of 10K . K-Taper? ** FFS moron - it says " A" taper !! Would that be 10A, 15A or 25A? Idiot. -- Adrian C |
#6
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log law pots ratio?
"Adrian ****head" Just come across a stereo slider in a Yamaha mixer amp labelled A10K x2 , fair enough meaning log, but mid track is 25 percent of 10K . K-Taper? ** FFS moron - it says " A" taper !! Would that be 10A, 15A or 25A? ** Irrelevant. Nothing says it is an Alps pot at all. And nothing says Nutcase Kook measured it correctly. You ****ing stupid, lying ****. ..... Phil |
#7
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log law pots ratio?
On 29/02/2012 20:06, Phil Allison wrote:
Would that be 10A, 15A or 25A? ** Irrelevant. Nothing says it is an Alps pot at all. Or says your name is Susan ... Is it? -- Adrian C |
#8
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log law pots ratio?
** FFS moron - it says " A" taper !!
A tapir is an ungulate animal. See... http://en.wikipedia.org/wiki/Tapir |
#9
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log law pots ratio?
On Feb 29, 11:22*am, "Phil Allison" wrote:
"Adrian ****" Just come across a stereo slider in a Yamaha mixer amp labelled A10K x2 , fair enough meaning log, but mid track is 25 percent of 10K . K-Taper? ** *FFS moron *- * it says *" A" taper *!! The factory could have installed the wrong elements. Assuming Cook is measuring the midpoint resistance as part of some troubleshooting process on a customer's defective equipment, I'd like to know (1) was this channel always bad? and (2) what reading he gets from the other channels. This would show if it's an isolated manufacturing mistake, or if the pot was damaged during operation. If the midpoint resistance was the 1K that the A-taper suggests, then if some fault drove it to 2.5K, I would expect the overall resistance to be 1.5K (or better) more. I'd like to know (3) what the overall resistance now is (4) for both sides of the pot, (5) for similar parts from the other channels, because I can't picture the same fault condition affecting multiple channels identically at the same time. |
#10
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log law pots ratio?
spamtrap1888 wrote in message
... On Feb 29, 11:22 am, "Phil Allison" wrote: "Adrian ****" Just come across a stereo slider in a Yamaha mixer amp labelled A10K x2 , fair enough meaning log, but mid track is 25 percent of 10K . K-Taper? ** FFS moron - it says " A" taper !! The factory could have installed the wrong elements. Assuming Cook is measuring the midpoint resistance as part of some troubleshooting process on a customer's defective equipment, I'd like to know (1) was this channel always bad? and (2) what reading he gets from the other channels. This would show if it's an isolated manufacturing mistake, or if the pot was damaged during operation. If the midpoint resistance was the 1K that the A-taper suggests, then if some fault drove it to 2.5K, I would expect the overall resistance to be 1.5K (or better) more. I'd like to know (3) what the overall resistance now is (4) for both sides of the pot, (5) for similar parts from the other channels, because I can't picture the same fault condition affecting multiple channels identically at the same time. ++++++ Back up together enough for testing now. Only one one pot removed. Actual reading was 11.2K and 8.7K/2.5K midpoint and to about +/-0.1K same readings the other track . Whether that out of speciness from 10K indicates overheating or something I've no idea but is is same both sides |
#11
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log law pots ratio?
" Nutcase Kook "
Just come across a stereo slider in a Yamaha mixer amp labelled A10K x2 fair enough meaning log, but mid track is 25 percent of 10K . K-Taper? ** FFS moron - it says " A" taper !! The factory could have installed the wrong elements. ** Shame how YOU have the wrong brain installed. Donkey brains instead of human. 25% at mid point is within tolerance for an " A " taper pot. You bull****ting, ****wit, autistic retard. ..... Phil |
#12
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log law pots ratio?
On Mar 1, 1:32*am, "Phil Allison" wrote:
" Nutcase Kook " Just come across a stereo slider in a Yamaha mixer amp labelled A10K x2 fair enough meaning log, but mid track is 25 percent of 10K . K-Taper? ** FFS moron - it says " A" taper !! The factory could have installed the wrong elements. ** *Shame how *YOU *have the wrong brain installed. * *Donkey brains instead of human. * *25% at mid point is within tolerance for an " A " *taper pot. And just where does that factoid come from? While you're pulling things out of your ass, check for hemorrhoids. * *You bull****ting, ****wit, *autistic retard. A badge of honor. |
#13
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log law pots ratio?
"spamtrap1888" = ****wit TROLL K-Taper? ** FFS moron - it says " A" taper !! The factory could have installed the wrong elements. ** Shame how YOU have the wrong brain installed. Donkey brains instead of human. 25% at mid point is within tolerance for an " A " taper pot. And just where does that factoid come from? ** The real world - a place you have never even seen. You bull****ting, ****wit, autistic retard. ..... Phil |
#14
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log law pots ratio?
On Mar 1, 2:22*pm, "Phil Allison" wrote:
"spamtrap1888" *= ****wit TROLL K-Taper? ** FFS moron - it says " A" taper !! The factory could have installed the wrong elements. ** Shame how YOU have the wrong brain installed. Donkey brains instead of human. 25% at mid point is within tolerance for an " A " taper pot. And just where does that factoid come from? ** The real world *- *a place you have never even seen. Sample size = 1? I suppose, though, in Allison World the pot could be linear -- 25% ratio is closer to 50% (nominal linear value at midpoint) than it is to 10% (nominal audio taper at midpoint) *You bull****ting, ****wit, autistic retard. Talking out your ass harms one's credibility. |
#15
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log law pots ratio?
"spamtrap1888" = ****wit TROLL
25% at mid point is within tolerance for an " A " taper pot. And just where does that factoid come from? ** The real world - a place you have never even seen. You bull****ting, ****wit, autistic retard. ..... Phil |
#16
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log law pots ratio?
On Mar 3, 1:06*am, "Phil Allison" wrote:
"spamtrap1888" = ****wit TROLL 25% at mid point is within tolerance for an " A " taper pot. And just where does that factoid come from? *** The real world - a place you have never even seen. * * * You bull****ting, ****wit, autistic retard. .... *Phil Here's a report from a hobbyist who found that the 50% point of common "audio taper" potentiometers ranged from 6% of total resistance to 15%. So the source of Phil's data -- 25% -- still seems to be his ass. http://tangentsoft.net/audio/atten.html |
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