DPDT switch problem - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps

Instruments and Amps Everything that makes music, Especially including instrument amps.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 12th June 2011, 02:59 PM   #1
diyAudio Member
 
Join Date: Mar 2011
Default DPDT switch problem

I've been building Small Bears Vintage IC distortion circuit and now I want to put it in a case. I want it to be true bypass without an LED. So I bought a DPDT switch and jumped connections 3 and 6, 1 to circuit out, 2 to tip of out jack, 4 to circuit in and 5 to jack in tip. the pedal works for the distorted sound then when the DPDT switch is pushed it sounds very crackly and the volume drops. Any ideas as to what I have done wrong?
  Reply With Quote
Old 13th June 2011, 04:16 PM   #2
diyAudio Member
 
indianajo's Avatar
 
Join Date: Jan 2010
Location: Jeffersonville, Indiana USA
It has been 36 hours. The numbers on your switch don't mean anything to anybody, they are not universal or standard. DPDT switches come with terminals 3 rows by 2 columns. Each column of three terminals is two switch contacts (at the ends) with the common pole in the middle. The switch contacts are alternately connected to the pole, usually the opposite of the direction the handle is pointing.
Drawing out your circuit may help you figure out your problem. Good luck.
__________________
Dynakit ST70, ST120, PAS2,Hammond H182(2 ea),H112,A100,10-82TC,Peavey CS800S,1.3K, SP2-XT's, T-300 HF Proj's, Steinway console, Herald RA88a mixer, Wurlitzer 4500, 4300
  Reply With Quote
Old 15th June 2011, 01:20 PM   #3
diyAudio Member
 
chrispenycate's Avatar
 
Join Date: Aug 2006
Location: Geneva, Switzerland
Presumably the output of the distortion circuit is not disconnected from the output jack, and is presenting a low impedance to the instrument. However, I'm not as convinced as the previous poster as to the universitality of pinout on DP DT switches (especially in that drawing the switch and putting the numbers where I would expect them your wiring seems right) Slide action switches occasionally have the common pole at one end.

Have you tried checking with an ohmmeter what the connections actually are with the switch in the two positions (and that you've not got a solder bridge across two connections, or melted the insulation on a jack or anything)?
  Reply With Quote
Old 15th June 2011, 03:40 PM   #4
Boofers is offline Boofers  Canada
diyAudio Member
 
Join Date: Oct 2008
Location: Ontario
Blog Entries: 1
Click the image to open in full size.

If you have it wired like this and it still gives you problems, you may just have a dirty switch. This may be remedied by spraying contact cleaner inside the switch if you can get at it. Sometimes there are little holes on the switch body. Sometimes you have to pull the switch apart to get the spray inside.
  Reply With Quote
Old 17th June 2011, 07:51 AM   #5
diyAudio Member
 
Join Date: Mar 2011
Thanks for your help guys. I've got it figured out now i went round the switch with my multimeter and there was a wire going to the wrong place. Thanks again.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Using a dpdt switch as on/off? haakok Parts 6 3rd May 2009 05:55 PM
LM3886 and DPDT switch Dino-Indo Chip Amps 4 6th July 2008 04:53 AM
Looking for dpdt switch jeff5x0 Parts 2 28th February 2006 08:35 PM
Need help wiring DPDT switch Static1 Parts 4 14th October 2003 10:25 PM
HVDC DPDT Switch Jack Thomas Parts 4 31st July 2002 12:16 AM


New To Site? Need Help?

All times are GMT. The time now is 09:22 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2