CONTEST Buddy's Summer Contest - 1 Knob? No Prob!
- Thread starter BuddytheReow
- Start date
CONTEST
. All hand built.
Chuck D. Bones
Circuit Wizard
Here's something I've had on the back burner since January. It's similar in function to JTEX's Pickup Retuner, however this one is much less refined. It's intended to sound like a Stuck Wah and has a similar transfer function to the venerable Cry Baby. I used an LF351 on the breadboard, although just about any single opamp will suffice. I also tweaked half of the component values since this photo was taken.
The Q of the filter is around 6 and can be easily altered by increasing or decreasing C2.
The Q of the filter is around 6 and can be easily altered by increasing or decreasing C2.
BuddytheReow
Moderator
I definitely need to try both Chuck’s and JTEX’s pickup voicers. They’re almost like onboard tone controls, but more effect based.
Keep em coming guys!
Keep em coming guys!
Passinwind
Well-known member
I could do a one knob version of my open source one, which has a much wider frequency sweep range than Chuck's, but his looks easy to breadboard and mine might not be. I wouldn't know though, I don' even own a breadboard setup. The JTEX version is very similar to mine anyway, now that I've looked at it.
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JTEX
Well-known member
I tried breadboarding a few times and didn't like the process or the result. I'd rather just use stripboard/vero. Breadboarding and blowing bubble gum are two basic things I was never quite able to get into...
BuddytheReow
Moderator
Like walking and chewing gum at the same time. Some people just can't do it!
BuddytheReow
Moderator
Less than a month left, folks! Let your inner mad scientist run wild! Let’s see what you’ve got!
*Inner mad scientist watches outer lazy scientist sit on couch again*
To be fair, my VOLS are going to the CWS...! Go VAWLS!
BuddytheReow
Moderator
Only 3 weeks left! Get those circuits fired up!
I was expecting a bit more action by now....
Or are you all doing the unthinkable: practicing!!
I was expecting a bit more action by now....
Or are you all doing the unthinkable: practicing!!
Chuck D. Bones
Circuit Wizard
July 15th.
t1redhands
Active member
A Harmonic Percolator for all seasons -
Here's the OKHP! MEGA Edition.
Yep - it's not very original but it makes a fun noise. This is designed for some unmarked VERY low gain germanium transistors, around 25 HFE.
Thanks to @Chuck D. Bones this is the "Spunk-o-matic" with an added Rangemaster gain stage up front and a MOSFET stage instead of clipping diodes. It's good n' loud with some hints of an octave up with splatty overtones. Bonus: it cleans up to a fun crunchy overdrive with the guitar's volume knob.
Here's the OKHP! MEGA Edition.
Yep - it's not very original but it makes a fun noise. This is designed for some unmarked VERY low gain germanium transistors, around 25 HFE.
Thanks to @Chuck D. Bones this is the "Spunk-o-matic" with an added Rangemaster gain stage up front and a MOSFET stage instead of clipping diodes. It's good n' loud with some hints of an octave up with splatty overtones. Bonus: it cleans up to a fun crunchy overdrive with the guitar's volume knob.
BuddytheReow
Moderator
Awesome! For the sake of this contest I’m assuming the external control is volume?
t1redhands
Active member
Yep! The bias trimmers would be internal.
Chuck D. Bones
Circuit Wizard
Nice! Is R12 really 5.1K?
t1redhands
Active member
Yep - I had a trimmer on it for the breadboard photo but found that matching drain and source resistors work pretty well. I forgot to mention - that MOSFET section is from PedalPCB's own MOSFET Driver. I was aiming for "MOSFET clipping" instead of more gain much like Wampler's latest Mofetta. I took a screenshot and a close look at Wampler's breadboard in his "Mostortion circuit redesigned" video and the MOSFET stages use this same topology.
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In the spirit of I don't really know what the hell I'm doing here is an overdrive/boost with a low parts count. I was actually thinking of building it as a one or two knob boost kinda pedal to house with another more characterful OD in one enclosure because it's a very simple sounding OD but makes an excellent boost into another OD. It's surprisingly quiet when boosting another pedal - often two ODs in series can get pretty noisy.
If I was to build it into an enclosure with another OD I would probably have two knobs - Volume and Gain. But I think a simple one-knob pedal with the external control being Volume would work too.
It's called Paternity because it's based originally on an Eternity pedal I bought years ago. It sounded crap with everything except my Les Paul.
And here is a Vero layout. I'll build this shortly - I've built it with four knobs already and you can adapt this layout very easily to a 4-knob circuit. I've left the original pot values in there too. I'll post pics of it as a one-pot soon.
If I was to build it into an enclosure with another OD I would probably have two knobs - Volume and Gain. But I think a simple one-knob pedal with the external control being Volume would work too.
It's called Paternity because it's based originally on an Eternity pedal I bought years ago. It sounded crap with everything except my Les Paul.
And here is a Vero layout. I'll build this shortly - I've built it with four knobs already and you can adapt this layout very easily to a 4-knob circuit. I've left the original pot values in there too. I'll post pics of it as a one-pot soon.
BuddytheReow
Moderator
Good news, everyone! (I feel like @fig when I said that in my head).
Considering the timing of this contest (it IS vacation season here and many of us are distracted) I am officially extending the deadline for all submissions to JULY 31st.
As a reminder, an official entry must include a legible schematic and a picture of your working prototype. If multiple potentiometers are used in your build you should mention which one will be the external one.
Now go build something!
Considering the timing of this contest (it IS vacation season here and many of us are distracted) I am officially extending the deadline for all submissions to JULY 31st.
As a reminder, an official entry must include a legible schematic and a picture of your working prototype. If multiple potentiometers are used in your build you should mention which one will be the external one.
Now go build something!
That's great! I have some parts on the way and July 15th would be a bit tight!
bean
Legume Liaison
Cool. I have my idea drawn up but won't be able to breadboard it until next week. There's time now!