Super '64

[apierz]

This is my third PedalPCB build and the first where I didn't have to come to the forums for help. I just plugged it in and it worked! I love the sound of it, it is definitely going to replace the Son of Ben on my pedalboard as my low wattage amp-in-a-box pedal. I think I may swap the knobs for aged white MXR style knobs but other than that I am happy with how it turned out.

Notes:
Here is the drill template I made for Tayda kits: https://drill.taydakits.com/box-designs/new?public_key=OXhWY2t1NWg1azVHYVB5a3BJMUMrZz09Cg==

It assumes a 3mm led in a bezel like mine, so you might want to adjust hole 2 depending on your preferences.

Also the build guide doesn't specify but the goal of the trim pots is to get a reading of 9V on your multimeter between the drain of each transistor and the negative terminal on the power jack. From what I understand the higher the voltage readings the more headroom the pedal will have.

 

[giovanni]

I think technically you get maximum headroom exactly at 9V. Higher than that and the top of the waveform will clip sooner than the bottom, viceversa if lower.

 

[apierz]

I think technically you get maximum headroom exactly at 9V. Higher than that and the top of the waveform will clip sooner than the bottom, viceversa if lower.

That makes sense. I was thinking of it like a dying 9V battery lowering the headroom on a pedal but if the 9V measurement is from the drain to ground then what you are saying makes more sense.

 

[giovanni]

I’m under the assumption that power rail is at 18V. What I should’ve said is that you get maximum headroom at Vcc/2. You would get more headroom with a higher Vcc (the opposite of a dying battery!).