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Jan Waclawek
11/19/13 14:11
Read: 874 times
Bratislava
Slovakia


 
#190152 - Tesla says: no
Responding to: Kai Klaas's previous message
Just for the heck of it, I looked up what used to be the most common (and usually the only available) potentiometer back then here in (the then) Czechoslovakia:

http://katalogy.ic.cz/TP160.html

The details of given data are astonishing (including e.g. testing voltage between "live parts" and "shell", rated vibration, and similar). The wiper current is at the bottom of page 133 (Proud sberace Is) given as max. 5uA! (Indeed, they were crap and tended to develop characteristic scratchy operation in audio circuits very quickly).

Turns out, they are still manufactured these days. The "modern" datasheet tends to copy the "world trend" of giving away as little information as possible....

Jan


List of 15 messages in thread
TopicAuthorDate
Power rating of potentiometers      Raghunathan      11/14/13 21:24      
   Not the point      Andy Neil      11/15/13 11:47      
      show me such        Jan Waclawek      11/16/13 13:48      
         (was) incorrect      Erik Malund      11/16/13 18:02      
            not your average "pot"      Andy Neil      11/17/13 07:40      
         Specs that are not normally told..      Raghunathan      11/17/13 03:37      
            power      Joseph Hebert      11/17/13 04:10      
            test bench vs field design       Jim Granville      11/17/13 12:13      
         That was kind of my point      Andy Neil      11/17/13 07:50      
   pot limits      Joseph Hebert      11/17/13 04:00      
      While I don't disagree ... there are different failure modes        Richard Erlacher      11/17/13 14:50      
   Bourns says: "yes."        Kai Klaas      11/18/13 16:08      
      Tesla says: no      Jan Waclawek      11/19/13 14:11      
      cermet or wirewound      Jan Waclawek      11/20/13 01:02      
         No big difference, if it all      Kai Klaas      11/23/13 06:10      

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