madbeanpedals::forum

Projects => General Questions => Topic started by: mchristie on November 21, 2011, 03:28:53 PM

Title: Resistor and cap tolerances - Dirtbag Deluxe
Post by: mchristie on November 21, 2011, 03:28:53 PM
All, I'm new here, and probably late to the party on this one.  Were there any specific tolerances to be aware of on the resistors and caps?  Metal-film vs. Carbon-comp?  I'm soooo looking forward to this build.  Did a Sunking earlier in the year and I have had numerous people comment on the quality of that pedal.
Title: Re: Resistor and cap tolerances - Dirtbag Deluxe
Post by: Scruffie on November 21, 2011, 03:34:03 PM
Tollerances to worry about are notated in the original schematic - http://sites.google.com/site/electroconducive/EHXDMM-Factory.jpg

(Quick glance says all the 0.27uF caps in the audio path should be within 5% Tollerance, all 1uF by the Compander should be 10%, 4.7uFs in the LFO should be 10% and the 24.3ks should be 1%).

Include the value of the Delay pot with that.

Most important component values are the Delay time pot, 5k6 resistor & 240pF Cap next to it. They will dictate getting the correct amount of delay out the pedal.

Otherwise, go nuts with your components. Carbon film, Metal film, Ceramic Caps, Mylar caps, they'll be fine.
Title: Re: Resistor and cap tolerances - Dirtbag Deluxe
Post by: mchristie on November 21, 2011, 04:11:48 PM
Thanks for the quick response.  I wasn't sure how closely Brian followed the DMM.
Title: Re: Resistor and cap tolerances - Dirtbag Deluxe
Post by: onthetundra on November 21, 2011, 11:47:08 PM
Where are the directions for the dirt bag?