Didn'd have such a C. I too an elco: this reduces out0 to 0 Vpp. Also a smaller C 2.2µF does the same. (Also on LTSpice oscillation dies after 0.1msec.) What do I have to adjust. Before, when the oscillator functioned during months, I effectively had 15Vpp.... Something else to try as far as increasing Vpp ... place a 100 μF capacitor in parallel with R1. This should increase the Vpp amplitude ... but may require adjusting. ... Not sure why LTSpice gives a greater Vpp amplitude ...
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