Rangemaster build

December 6th, 2013, 05:43 PM
First pedal build from scratch. Doing a rangemaster from GGG with an OC44 I bought from small bear to try to get as close to vintage as I could. I'd like to be able to switch the input cap value on the fly. Here's what I have.


I know schematically how it should work. Can someone help me with the practical installation please? Aside from this switch and some different value caps, what other parts do I need? And how do they go together?


December 6th, 2013, 09:32 PM
I built a rangemaster on vero board using the same transistor from small bear and the switch stuff is really easy. Get a dpdt (it's the kind with 6 lugs) on-on switch, and run the 2 center lugs to the 2 solder pads for the .0047 input cap. Then wire one cap to the outside 2 lugs and your other cap to the other 2 lugs. I would also get some alligator clip leads and play with several different cap values to find what works with your rig. I think I ended up using a .022 and a .01, but I tried a bunch of different caps until I got what I wanted.

This ended up being one of my favorite dirt pedals and I use it all the time.

Check this switch info for some clearer diagrams http://www.beavisaudio.com/techpages/switches/

December 7th, 2013, 10:57 AM
I understand if you donīt wanīt to make a PCB for such a simple circuit that can easily be wired on a tagboard or a veroboard.Here are a couple of layouts:
A bigger picture:
A good vero layout with switching:
Another vero layout:
http://www.google.se/imgres?imgurl=http://www.aronnelson.com/gallery/main.php%3Fg2_view%3Dcore.DownloadItem%26g2_itemId %3D46902%26g2_serialNumber%3D1&imgrefurl=http://www.aronnelson.com/gallery/main.php/v/diyuser/Sundgist/Rangemaster%2BStripboard.gif.html&h=593&w=531&sz=15&tbnid=-mqEGmb1tAOthM:&tbnh=90&tbnw=81&zoom=1&usg=__4A56ThT_qPDkXPHPAM_M_H_JY7I=&docid=TIN3_emuoAdz1M&sa=X&ei=pzejUreAN4W8ygOXxoCICg&ved=0CDMQ9QEwAQ