Someone please correct me: 1. a capacitor discharges to 63% of its initlal voltage after a time T = R * C. 2. a typical running HO locomotive uses roughly 250mA (no lights, no sound), @15V DCC, at least 3. meaning a average resistance of 15/0.250=60 Ohms. 4. typical capacitor values for "Keep Alive" circuits are 10.000µF at best given its size must be fitted somewhere 5. T = 60 Ohms * 0.01F = 0.6 seconds for the voltage to drop to 63% of 15V (9.45V) These all are best case assumptions? Conclusion: a "Keep Alive" is an illusion. Right or wrong, and why wrong?