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Ultrasonic trans/rec transducer support hardware

Delta Prime

Jul 29, 2020
521
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Jul 29, 2020
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What is a 10-turn preset?
A potentiometer, commonly referred to as a “pot”, "trimmer","preset" is a three-terminal mechanically operated rotary analogue device which can be found and used in a large variety of electrical and electronic circuits. ;)
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HANKMARS

Jul 28, 2019
484
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Jul 28, 2019
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484
10 precicion pot 1.1.pngThe thot of trimmer pots went thru my head but I visualized the single turn 1M ohm ones that I use on another project and I ruled out trimmer pots. I resigned myself to having to use precision 10 turn pots with locking knobs, usually around 10 bucks each. Thanks for jogging my memory. I think the 10-turn PCB mount pots will still be a little "springy" but also think that they will stay set more so than the larger panel mount pots. Especially if I drop a little locktite or maybe nail polish on adjustment screw. This is the first time I heard these pots referred to as presets. But then again, it was just last year I first heard the term valve in reference to what I had for years called vacuum tubes.
 

kellys_eye

Jun 25, 2010
5,699
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Jun 25, 2010
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5,699
Shame you aren't UK-based. I could chuck a few items like those your way as I have a selection in my 'crap' box.....
 

HANKMARS

Jul 28, 2019
484
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Jul 28, 2019
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484
Shame you aren't UK-based. I could chuck a few items like those your way as I have a selection in my 'crap' box.....
The sentiment is much appreciated but I will order an assortment of "presets" for my own goodies box. The overall value I need in that particular leg of the circuitry is ~134k ohm. As it sits, I'm using a 68k fixed resistor and a 100k single turn panel mount pot. Because thats what I have on hand. If I change fixed resistor to ~ 130k then use a 10k pot, the springyness will be a lesser concern.
 
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