D-lab project. Here is a test using a guitar input and listening on a Fender VibroChamp. I made some minor circuit changes to get the sinewave symmetrical, plus lowered the output to avoid overdriving an amplifier. This consisted of changing the cathode follower/mixer 12AX7 plate resistor value + adding a 1 meg level out pot. I also added a rear RCA jack to kill the tremolo oscillator (Foot switch control). As I stated, this will be a work in progress. If this device performs as I hope, a Reflex amp will follow. Consisting of a Reflex board feeding a ECB-A class A board! Cool modular design! Fun! If you would like to be in on the fun join my Patreon.