OK, I've checked my archives, and Googled a Googleplex of times with no results that seem to fit. Many years ago, I built a simple square wave generator, using a MC-799P Dual Buffer (anybody still remember RTL Logic???) One IC, two resistors, and two capacitors were all that was needed to run off two AA batteries for over a decade.. [Probably over four decades by now, but with occasional battery replacement every 20 years.] Harmonics of the ≈1 kHz osc. would go well into the VHF TV range! I can't remember if the circuit was from Pop'Tronics or Radio Electronics, probably early 1970's. Does anyone have such mags in their archives that may have the original circuit?