Re: 10 turn Pots

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From: Raventhorne (jelder@ix.netcom.com)
Date: Wed May 28 1997 - 01:24:02 EDT


At 09:13 PM 5/27/1997 -0700, Norm Melick wrote:
>My 38S works great. That is until I attempted to change the 100K tuning
>pot to a 10 turn 100k pot. Now I keep ruining the 10 turn pots. My
>girl friend (Tech) asked me, "What is the rating of the pot?"
>
>I said, in my professional pilot/Tech+ voice, "I don't know".
>
>So the question of the day for us is, When I buy the next (and hopefully
>last) 10 turn pot, I have a choice between one rated at 2W and one rated
>at 5W. Which one?

Looking at the 38s schematic, it appears that the only path to DC ground is
through the full resistance of the pot--100K. p=v^2/r=8^2/100,000 = 640
MICROwatts. Have you checked for a short from the wiper to ground?

72,

John

@~~~
@ John Elder, Ko6TS
@ PHROG (Pagan Ham Radio Operators' Guild)
@ Box 232, El Segundo, CA 90245
@ So many fools, so few comets . . .


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