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DIY Stompboxes => Building your own stompbox => Topic started by: jbgron on October 18, 2008, 09:07:27 PM

Title: Need help identifying 3PDT switch terminals
Post by: jbgron on October 18, 2008, 09:07:27 PM
Hi guys,

Yes, I've read the FAQ and I've seen these pics http://www.diystompboxes.com/pedals/images/3PDTwiring.jpg (http://www.diystompboxes.com/pedals/images/3PDTwiring.jpg)  But I still can't figure how to identify the terminals on a 3PDT switch  ???.  I've obviously got them wrong at the moment because I'm getting nothing from my pedal.  Can somebody please help?

jbgron
Title: Re: Need help identifying 3PDT switch terminals
Post by: sean k on October 18, 2008, 09:13:35 PM
Did you have the pedal working before you hooked it all up to the jack and have therefore isolated the wiring to the jack as your actual problem?

Are the poles in the right direction? The poles are vertical in the .jpg.

And have you determined that its wired like the picture and when using the switch there is continuity, using a multimeter, between the points that are supposed to have it?
Title: Re: Need help identifying 3PDT switch terminals
Post by: jbgron on October 18, 2008, 09:23:33 PM
Yes it was all working fine before I hooked up the swtich.

I don't know if the poles are in the right direction, this is the point of my question, how can you tell if the poles are in the right direction ???  Its definitely wired like the one in the picture but I don't know if I've wired it to the correct poles.
Title: Re: Need help identifying 3PDT switch terminals
Post by: liddokun on October 18, 2008, 10:54:44 PM
(http://www.stewmac.com/freeinfo/i-1561/1561_dia5.gif)

Make sure the holes in the lugs are parallel to the ground (e.g. looking straight down at the switch, you can see through the holes (sorry, not that great of a explanation).
Title: Re: Need help identifying 3PDT switch terminals
Post by: R.G. on October 18, 2008, 11:10:45 PM
Use your ohmmeter.
Title: Re: Need help identifying 3PDT switch terminals
Post by: calpolyengineer on October 19, 2008, 12:13:20 AM
Quote from: R.G. on October 18, 2008, 11:10:45 PM
Use your ohmmeter.

Seconded. I had to do that every time for a while until I had it engrained in memory.

-Jow
Title: Re: Need help identifying 3PDT switch terminals
Post by: petemoore on October 19, 2008, 09:18:23 PM

  "Standard' [or the one option], often you'll see the jumper at the bottom in schematics, the In/Out wiring for that follows...
   With the lugs facing you, turn it to the side and look through the eyelets.
  If you can't see the eyelets, with the lugs facing you again, turn 1/4 turn, now turn it straight away from you, viewing from the sides you should be able to see through the eyelets.
  Works on every 3PDT blue and many other switches, test with DMM.
  Also, understand the connections the switch makes in it's various states, then verify that it's doing that.