The 24db 4-poles resonant high and low pass filters back to back in a good looking white half rack version. Here’s a quick demo (WARNING: extreme resonance-watch your […]

Apart from a few mistakes, both the PCBs worked, so I could quickly build two stereo devices, a low-pass and a high-pass. It sounds great, just like I […]

The first mod will be getting this “Univibe” hack: http://www.lynx.net/~jc/pedalsSmallStone.html The idea is to emulate the “Univibe” effect using the four CA3080 OTAs on the clone, getting both […]

Next on the list is building great filters, both resonating High and Low Pass, voltage control is a must if I want this to integrate further on a […]

I just love Electro-Harmonix phasers such as the Small Stone or the Electric Mistress.. I found these schematics to build a Small Stone replica using the CA3080 Operational […]

My my first effect build I wanted to do a delay so I went and shopped around for designs. I found some cool ones there, based on the […]

I wanted to have an Isolator-style high pass filter device to play with. I found this design at https://www.eeweb.com/blog/circuit_projects/20hz-to-200hz-variable-high-pass-filter that uses a very common op-amp, the TL072. And there I […]