I have a question about resistor substitutes.

Started by BernieRunns, May 30, 2013, 12:14:32 PM

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BernieRunns

The delay unit I am building calls for a .001 resistor, which i do not have, and I am having trouble finding for some reason. Is there a substitute I can use? I am very new to this hobby and have yet to gain the knowledge to make these calculations myself.

What is an acceptable range to make substitutions? Should I go up or down? Is this kind of a trial and error type thing?

The unit also calls for .082      .01    .027     and a     .1

These all seem like really small values in comparison to the stock I have.

Help would be fantastic as this thing has set unfinished for a few years now.
The Right Reverend Bernie Runns

GGBB

Quote from: BernieRunns on May 30, 2013, 12:14:32 PM
The delay unit I am building calls for a .001 resistor, which i do not have, and I am having trouble finding for some reason. Is there a substitute I can use? I am very new to this hobby and have yet to gain the knowledge to make these calculations myself.

What is an acceptable range to make substitutions? Should I go up or down? Is this kind of a trial and error type thing?

The unit also calls for .082      .01    .027     and a     .1

These all seem like really small values in comparison to the stock I have.

Help would be fantastic as this thing has set unfinished for a few years now.

I've never heard of a ".001" resistor nor ever seen resistors referred to in that format.  They are usually 10, 10K, 1M, 2.2M, 4K7 and similar.  Those seem like values for capacitors, not resistors, in which case they are very likely in microfarads - and are all typical common values.
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midwayfair

These are capacitor values, not resistors. .082 and .027 aren't common but are hardly rare. The other three are probably the most common capacitors used.
My band, Midway Fair: www.midwayfair.org. Myself's music and things I make: www.jonpattonmusic.com. DIY pedal demos: www.youtube.com/jonspatton. PCBs of my Bearhug Compressor and Cardinal Harmonic Tremolo are available from http://www.1776effects.com!

deadastronaut

yeah, i think you meant capacitors?..

rebote delay?..

i built mine subbing

0.1uf  for the 0.082..

0.022 for 0.027...

the others are very common values...
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https://deadastronaut.wixsite.com/effects

chasm reverb/tremshifter/faze filter/abductor II delay/timestream reverb/dreamtime delay/skinwalker hi gain dist/black triangle OD/ nano drums/space patrol fuzz//

BernieRunns

Well, I am glad I asked.  haha

Like I said, I am new to this. Thanks for the info. I'll be finishing this up today.
The Right Reverend Bernie Runns

deadastronaut

so its the rebote then?.. ;)

i usually looks at caps as 'nF'  -   100nf, 10nf, 1nf  etc....saves all those 00000000000.1's.. ;D
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https://deadastronaut.wixsite.com/effects

chasm reverb/tremshifter/faze filter/abductor II delay/timestream reverb/dreamtime delay/skinwalker hi gain dist/black triangle OD/ nano drums/space patrol fuzz//

BernieRunns

Yeah, a rebote.

Is that 27pf ?? for the 22pf?
The Right Reverend Bernie Runns

deadastronaut

theres a

5pf...use a 10pf

51pf.....47pf

560pf....470pf

much more common...have fun. ;)
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https://deadastronaut.wixsite.com/effects

chasm reverb/tremshifter/faze filter/abductor II delay/timestream reverb/dreamtime delay/skinwalker hi gain dist/black triangle OD/ nano drums/space patrol fuzz//

R.G.

Quote from: BernieRunns on May 30, 2013, 12:14:32 PM
The delay unit I am building calls for a .001 resistor, which i do not have, and I am having trouble finding for some reason. Is there a substitute I can use?
You're getting good advice. That is almost certainly a value for a **capacitor**.

0.001 ohms is about two inches of #12 solid copper wire.    :icon_eek:
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

Govmnt_Lacky

Quote from: BernieRunns on May 30, 2013, 12:14:32 PM
What is an acceptable range to make substitutions? Should I go up or down? Is this kind of a trial and error type thing?

To address this portion of your question...

The "going rate" of component substitutions for resistors and capacitors is about + or - 10%

Example: The component on the schematic calls for a 0.05uF capacitor. You could use anything from 0.045uF to 0.055uF (in this case, most would use a 0.047uF as it is a common value)

Example: You need to find a 0.0027uF cap. You can use 0.0024 to 0.0030. Since there are no "commonly used" values in this area, you could probably get away with using a 0.0022 OR a 0.0033uF.

Hope this helps..  ;D
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BernieRunns

Thanks guys.
Having this answered for me got me back in the lab and working on some pedals and resulted in a components order for a few new projects. I'm sure I'll have more questions soon.
The Right Reverend Bernie Runns

deadastronaut

Quote from: R.G. on May 30, 2013, 01:08:17 PM
Quote from: BernieRunns on May 30, 2013, 12:14:32 PM
The delay unit I am building calls for a .001 resistor, which i do not have, and I am having trouble finding for some reason. Is there a substitute I can use?
You're getting good advice. That is almost certainly a value for a **capacitor**.

0.001 ohms is about two inches of #12 solid copper wire.    :icon_eek:

that's it i'm making my own resistors then...might need a big box though.. ;D
https://www.youtube.com/user/100roberthenry
https://deadastronaut.wixsite.com/effects

chasm reverb/tremshifter/faze filter/abductor II delay/timestream reverb/dreamtime delay/skinwalker hi gain dist/black triangle OD/ nano drums/space patrol fuzz//