I have built the ESP project 5 preamp powersuply and connected it to an 2x 9v trafo. When i measured the output of the trafo the actual power was 20 V AC. So I connected it to the PSU and measured the output. It was 35 V....
I want to use this PSU for the ESP P88 with two OPA2134 opamps, which have an maximum Vi rating of 36V DC.
So I guess my freshly built PSU is no good at all for this preamp. Does anyone know why the output voltage can be this high? I used one 7815 voltage regulator and a 7915 (negative) voltage regulator. I looked at the datasheets of these regulators and the maximum input voltage can be much higher for these devices.
Can anybody help?
I want to use this PSU for the ESP P88 with two OPA2134 opamps, which have an maximum Vi rating of 36V DC.
So I guess my freshly built PSU is no good at all for this preamp. Does anyone know why the output voltage can be this high? I used one 7815 voltage regulator and a 7915 (negative) voltage regulator. I looked at the datasheets of these regulators and the maximum input voltage can be much higher for these devices.
Can anybody help?