Trimmer for Chop Shop

[Ctrl4Smilerz]

I'm putting a Chop Shop board together and the build doc calls for 2 50k 3362P type trimmers (3 leads) which I have but the board has 5 holes for each of the trimmers. Will mine work, or do I need to order something different?

 

[Locrian99]

I'm putting a Chop Shop board together and the build doc calls for 2 50k 3362P type trimmers (3 leads) which I have but the board has 5 holes for each of the trimmers. Will mine work, or do I need to order something different?

I just put mine together this morning. The bottom two holes are for if you want to use a resistor I think. The top three work fine with your trim pot.

 

[Ctrl4Smilerz]

I just put mine together this morning. The bottom two holes are for if you want to use a resistor I think. The top three work fine with your trim pot.

Thanks!

 

[Robert]

The extra pads are for trim pots with wider pin spacing, like these:

 

[Locrian99]

Oh well I guess I’m wrong then lol. Man and I have some of those I never use in anything because they don’t fit lol.

 

[Robert]

You certainly could use a resistor there.... Let's call them multi-purpose pads.

 

[Locrian99]

You certainly could use a resistor there.... Let's call them multi-purpose pads.

I actually debated just putting the resistors there since I measured the ldss of my j201’s…

 

[Feral Feline]

Not a bad idea to have fixed resistors, once you've biased the JFETs; I've read trimpots can introduce noise.

Whether it's noise that's noticeable to the naked ear or just noise on an oscilloscope, I don't know, if it even truly adds noise at all.

 

[The Gator]

At the risk of sounding like a pedalpcb butt kisser...
The fact that there's optional solder points and a voltage test pad is pretty awesome design qualities.
Great boards and a great community!