[Boatanchors] Potentiometer Size

[Al Klase]

Hi John,

Agreed.  The important word was "estimate".  Guess I should have said 
"by inspection of the schematic."  The good news for Bill is that 
virtually any logarithmic or "audio taper" pot, that physically fits, is 
going to work just fine.

Al

On 7/9/2010 6:25 PM, J. Forster wrote:
> You really should not put DC or high voltage AC through a pot like that.
> It was never meant for that kind of service.
>
> At a semi-educated guess, I'd think 1/2 Watt max.
>
> -John
>
> ==============
>
>
>
>    
>> Bill,
>>
>> I'd try to estimate how much power it's going to dissipate, and back
>> into the answer.  For instance:  500 volts (squared) divided by 500K
>> ohms = 1/2 watt.  It's unlike that a half meg audio pot is ever going to
>> be subjected to any significant power.
>>
>> Al
>>
>> On 7/9/2010 3:55 PM, Bill Stewart wrote:
>>      
>>> Is there a rule-of-thumb to indicate the wattage of a potentiometer by
>>> its physical dimensions?  I'm trying to figure the wattage of a 500K
>>> audio pot. that's about 1  1/16 " dia. by about 1/2 " (pot. only, switch
>>> is additional) long.
>>>
>>> Thanks, Bill K4JYS
>>>
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>> --
>> Al Klase - N3FRQ
>> Jersey City, NJ
>> http://www.skywaves.ar88.net/
>>
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>>      
>
>    

-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/