Brutalist Jr Mod - Need reverse taper pot help
- Thread starter D1chotomy
- Start date
fig
Village Idiot
This article seems to explain it (around the middle).
http://www.geofex.com/article_folders/potsecrets/potscret.htm
I stumbled upon while googling....well never mind
http://www.geofex.com/article_folders/potsecrets/potscret.htm
I stumbled upon while googling....well never mind
Chuck D. Bones
Circuit Wizard
The short answer is "no."
The reason is that paralleling a pot with a resistor makes the high resistance end of rotation change more slowly. What we want with a log or reverse-log pot if for the low resistance end to change more slowly. The only difference between a log and a reverse-log pot is which end of rotation (CW or CCW) is the slowly changing end.
Which pedal is using it?
The reason is that paralleling a pot with a resistor makes the high resistance end of rotation change more slowly. What we want with a log or reverse-log pot if for the low resistance end to change more slowly. The only difference between a log and a reverse-log pot is which end of rotation (CW or CCW) is the slowly changing end.
Which pedal is using it?
D1chotomy
Active member
Chuck,
It's actually for the GCI Brutalist Jr. I want to add the "Response" mod to R6. It's listed below.
Response Mod: Replace R6 with a potentiometer. Aside from affecting the high pass filter, R6 also has an effect on gain. By sweeping the R6 pot in one direction, high pass filtering and gain will increase simultaneously, possibly making the pedal better suited for tight heavy metal rhythm playing. By sweeping in the other direction, bass increases while gain decreases, making the pedal bigger and looser sounding. Try a 1k reverse log pot in series with a 47 ohms resistor.
D1chotomy
Active member
Okay, so here's what I ended up doing. I used my C10K and put a 1.5k R between lugs 1 and 2. I wanted a 1.2 but didn't have it. Then I connected my 47 Ohm resistor in series and plugged everything back into R6 on the PCB which is socketed, thankfully. There is a noticeable difference now and the pot definitely makes a difference. Not sure if I love it though. I really need more time to play with it. I also took the time to play with a couple different IC's and swapped the diodes for red LED's in different combinations. This is a fun pedal. At the very least, I'm going to install a toggle switch for different clipping options. I'm kind of running out of places to drill holes though lol.
Here's how it looks in all it's test glory (did I do this right)? And then a few of the mostly finished pedal. Yeah, wiring is a bit of a mess.
Here's how it looks in all it's test glory (did I do this right)? And then a few of the mostly finished pedal. Yeah, wiring is a bit of a mess.
Attachments
Chuck D. Bones
Circuit Wizard
You turned your C10K into a B1.3K pot.
D1chotomy
Active member
Hahahaha okay I obviously read something wrong then. It's clear I still suck at this... Help?
D1chotomy
Active member
Or should I say, took the advice of a redditer...
Chuck D. Bones
Circuit Wizard
You really need to buy a C1K pot. A B1K would do if you're willing to bump the 47R up to 100R or more, but then you won't get the full range of boost.
D1chotomy
Active member
Chuck,
You are 100% correct and they are on order. I was just experimenting and trying to learn today. Thanks for your help!
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