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Hoffman Amps Forum image Author Topic: bias pot rating  (Read 2111 times)

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Offline Quatro

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bias pot rating
« on: July 22, 2012, 07:11:07 pm »
how many watts is a typical bias pot rated for? Can a standard pot do the job in a pinch?
« Last Edit: July 22, 2012, 07:19:50 pm by tubenit »

Offline PRR

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Re: bias pot rating
« Reply #1 on: July 22, 2012, 08:51:48 pm »
Work out the voltage, resistance, power.

Since amps vary a LOT, from 15V to 65V bias and 250K to 10K pot, I'd hate to give an average answer if you have an extreme amp.

Offline Quatro

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Re: bias pot rating
« Reply #2 on: July 22, 2012, 09:09:43 pm »
50v bias supply. 36k pot with in think 10k between it and the ground.

.06 watts?


Offline PRR

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Re: bias pot rating
« Reply #3 on: July 23, 2012, 09:58:19 pm »
Something like that. And you can't find a pot smaller than 1/8W (0.125W). So any pot.

Offline Quatro

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Re: bias pot rating
« Reply #4 on: July 26, 2012, 12:30:44 pm »
thanks prr. you are top drawer.

 


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