Electronics question

[hangingmonkey]

Hi everyone,

Im new to this forum and to building stompboxes although ive managed to make a ts808 and got it working. Im using the layouts from tonepad and im currently making the mxr noise gate. Theres a few mods im trying to do. On the instructions:

http://www.tonepad.com/getFile.asp?id=77

Where it says you can mod the pedal by adding in more controls it says to replace the jumper with a pot. My question is if a pot has 3 pins and a jumper has only 2 points of contact, which pins do i connect and what do i do with the third one?

Any help would be much appreciated. Thanks guys.

[theundeadelvis]

Depending on what the pot is acting as, it's probably as simple as running a wire from the middle lug of the pot to one of the solder pads where the jumper was, and then running a wire from one of the outside lugs of the pot to the other pad.

[hangingmonkey]

Thanks for your input. Ive just had a look at the circuit diagram on the pdf link that i provided. It shows that the pots for attack and release on the circuit diagram has a line from pin 3 going to 2 with an arrow. Does that mean i join pins 1 and 3 to the pcb and put a jumper between 3 and 2?

[Brossman]

Yes.    Just make sure you get your lugs on the pot in the right order.

[hangingmonkey]

Thanks mate

[hangingmonkey]

Also, on the build reports on the tonepad website for the mxr pedal, it says:

'As recommended in several build reports, I replaced the 1M resistor between Q3 Gate and Attack with a 1.8K resistor.'

Could someone have a look at the pdf link i provided and tell me which 1m resistor i should be replacing?   Im just playing it cautious as i dont want to replace the wrong one.

Thanks

[lopsided]

Gate is the name of one terminal of the Field Effect Transistor. (http://www.sciencelobby.com/field-effect-transistor/images/nfet.gif)
If you don't know which one, you can check the datasheet of the transistor (for 2N5458 http://www.datasheetcatalog.org/datasheet/fairchild/2N5485.pdf)
there are three 1m resistors at the right/center on the layout.
I think the one that goes from gate to the attack pot is the middle one.

[hangingmonkey]

Thanks, u guys have been very helpfull