I'm not an Electonics professional, and hope someone can explain why the circuit below, I've used to build a dual rail +15v,0v, -15v Power Supply drops voltage down to about -7.7 volts when connecting -15v and 0v across a 4.7k resistor; the voltage should remain stable.
What I would say is that on removing C5, C9 and C10 out of the circuit it then stablises as would be expected. This circuit, with the capacitors is quite common; could anyone tell me what's happening in this case?
If a load is places across -15V and 0v, and more current is drawn, does this decrease the voltage drop across C9 and therefore adjust the output voltage?
Thanks in advance.