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Description
CATALINBREAD KNIGHT SCHOOL SYNTH - DIY KIT DIYIf you want to get your hands on a Knight School Synth, we're offering them fully in kit form if you fancy building one yourself. Assembly is very straightforward and requires only a soldering iron, some solder, and proper ventilation, we'll take care of the rest. Here's a tale from the annals of my personal DIY history: I learned how to breadboard and read schematics right before college, and I breadboarded many designs posted on ampage. org. Shortly
If you want to get your hands on a Knight School Synth, we're offering them fully in kit form if you fancy building one yourself. Assembly is very straightforward and requires only a soldering iron, some solder, and proper ventilation, we'll take care of the rest. Here's a tale from the annals of my personal DIY history: I learned how to breadboard and read schematics right before college, and I breadboarded many designs posted on ampage.org. Shortly after that, I found a new DIY website. This one was called Beavis Audio. If you're familiar with this, it's for a good reason, BA was one of the premier DIY sites out there, and it refreshingly wrote everything in plain English. One of the projects there was called the Heterodyne Peyote Space Explorer". This introduced me to the CD40106 chip and I played around with that device for what seemed like double-digit hours when I was taking EE classes. One thing I stumbled across was when I combined a boost circuit I was working on with the 40106. It made an oddball noise, but one I thought could be cool with some refinement. It took a lot of tinkering, but it worked much better when I put a second boost circuit in front of it. I couldn't really explain why, but it sounded cool, and I built a couple for my friends. Some time later, I stumbled across a webpage authored by one Tim Escobedo. There's a ton of good info on his "Circuit Snippets" page, and it still exists today. As it turns out, Mr. Escobedo discovered a form of this circuit back in 2002, and comparing his circuit analysis with mine and the Space Explorer was a real "Eureka" moment for me. Our Knight School Synth is our most ambitious project to date. I've since leaned into Mr. Escobedo's method for producing the pre-gain, as it's simpler and uses far fewer parts than my original. Essentially, it turns your guitar signal into a square wave, and then uses the CD40106 to vary the pulse width of that square wave. There's also a switchable LFO, which automatically varies the pulse width for you, along with a Depth control to change the intensity of the shaping. It's a truly cool effect that emulates the monophonic synthesizers of yesteryear. Dare I say there's not a lot on the market these days that sounds like this! Controls - Rate: Speed at which the LFO automatically varies the pulse width. - LFO switch: Turns the LFO on and off. - Volume: Output level. - Depth: Intensity of the LFO. - Pulse: Takes your square-wave guitar signal and changes the width of the "on" square wave. Power supply The Knight School Synth only accepts a center-negative DC power supply capable of supplying 9 volts and at least 0,5mA of current (over is fine). DIY Kit information The circuit board has everything labeled as to what part goes where. You'll find the below image very helpful to identify what parts are what. There's also a video below showing you how the process will go. "Controls:
Volume, rate, lfo, depth, pulse.
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★★★★★ 5
Durable rubber pet balls
Size: Medium, Style: Squeaker
They are very durable my pooch can’t chew them up , it’s a good product
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Reviewed in the United States on April 3, 2026
★★★★★ 5
Good ball for aggressive GS.
Size: Medium, Style: Squeaker
Best ball but the squeaker will not last long😬
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Reviewed in the United States on March 3, 2026
★★★★★ 5
Squeaks for a while
Size: Medium, Style: Squeaker
I've got probably 10 of these, now. The squeaker fails pretty quickly. But our dog still likes them, just not as much as when they squeak. I'm tossing these a good 75 yards and farther. The Chuckit glowballs make sounds through their holes so no separate squeakers there. Dog really likes those glowballs.
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Reviewed in the United States on March 26, 2026
★★★★★ 4
Great quality but the squeaker doesn't last long - still a good value
Size: Medium, Style: Squeaker
I have golden retrievers who never get tired of playing balls. These are VERY durable. No seams to split. They tend to chew as they bring the balls back, so the squeaker doesn't last long. Would highly recommend these. I have them on auto-delivery!
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Reviewed in the United States on December 15, 2025
★★★★★ 5
Highly recommend
Size: Medium, Style: Squeaker
My dog loves these! They are now his absolute favorite! The squeaker lasts a lot longer than most. The rubber isn’t hard on his teeth and he likes how squishy they are and continues to play with it long after the squeaker dies. Highly recommend and will be buying more
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Reviewed in the United States on May 5, 2026