High precision manual trimmer

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yefj

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Hello , I have a trimmer (knob variable resistor )
Unfortunately when I turn the knob it resistance turns in a very high rate .
Is the a trimmer for example of 1Kohm
Which will cover its range in 5 times more turns than usual?
Thanks.
 

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    yefj

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Have seen up to 20T. But you also could look at
making trimpot part of a ladder, trading range for
resolution if that's sensible. You also want to think
about consequences of trimpot wiper bounce and
crust, for anything exposed to shock / vibe or much
humidity.
 

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Exactly I am tuning YIG frequency with that thing .
I will take 10 ohm with 20 turns .
What do you mean bounce and other effects .
Is there a trimmer which is will not give me such problems ?
Thanks .
 

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What is the ppm or uV resolution you want on control, and range of V desired ?
 

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