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.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 5,247
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 1,716
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 2,040
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 1,716
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 2,040
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 1,716
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 2,040
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 3,833
Default log law pots ratio?

** FFS moron - it says " A" taper !!

A tapir is an ungulate animal. See...

http://en.wikipedia.org/wiki/Tapir


  #9   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 314
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 5,247
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 1,716
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 314
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 1,716
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 314
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 1,716
Default 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   Report Post  
Posted to sci.electronics.repair
external usenet poster
 
Posts: 314
Default 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
Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pots, loads, and nonlinearity. - 3 channel mixer pots.pdf John Fields Electronic Schematics 6 November 17th 11 12:58 AM
SWR ratio #'s Ernie Werbel Electronics 3 April 23rd 07 12:30 AM
oil-gas ratio Choreboy Home Repair 6 June 30th 05 11:47 PM
morter mix ratio JD Home Repair 4 June 22nd 05 01:14 AM
addition cost, ratio Nate Home Repair 1 April 17th 05 07:03 PM


All times are GMT +1. The time now is 05:43 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"