5 Aug 2024, Special notes for New V1.3 PCB: Here is the change in the probe points and how to measure them. Please read on.
 
For more accurate frequency measurements
Frequency counters sold as kits are inexpensive and recommended. The links do not have any commercial causal relationship with us.
*The link I chose was the cheapest one I saw. This Chinese-made red board kit is less likely to break, so I recommend it. Please take a look at other listings and choose a cheaper and better seller.

Product Introduction
Experience precision overclocking like never before with Spicy O'Clock, a compact and innovative device crafted in Japan for 68040 processors. This cutting-edge silicon oscillator unit allows you to set your desired clock speed anywhere from 37.6MHz to 51.8MHz (actual output is half this value, as it’s doubled by the clock driver on the logic board).
What sets Spicy O'Clock apart? Unlike traditional crystal oscillators, this device delivers unparalleled clock stability, ensuring smooth and reliable performance even under overclocked conditions. Plus, its 1/100 MHz incremental tuningempowers you to achieve finely-tuned performance tailored to your needs.
Elevate your overclocking experience with Spicy O'Clock – precision, stability, and innovation in a pocket-sized powerhouse!
 
Our Instruction Manuals here
 
Here is the Spicy O'Clock bracket for Mystic and the back panel with adjustment holes. Useful for installing Spicy O'Clock.
 
Available models
 
LC475, LC575 (Mystic), LC(Performa)630, LC(Performa)588, Quadra (Centris) 650, Quadra (Centris) 800/840AV, Pioneer MPC-LX100(Mac 040clone)
 
For the above models, Spicy O'Clock! Can be used because the XC88916DW clock driver designed exclusively for 68040 generates twice the clock. In addition to the above (we have not verified), any model using the XC(MC)88916DW can be used.
 
Wiring diagrams
Wiring diagrams here , for LC475, LC575(Mystic), Quadra650(Centris650), Quadra800Options