Have you measured the voltage at the points I marked number 1 and number 2 of the circuit?
- point 1 needs to have a voltage = 0 V relative to GND,
- when point 1 = 0 V, point 2 must be greater than 0.6 V for the relay to close.
Please check that carefully.
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@Nguyenha7940 thanks i will try. I replaced capacitors and transistors to exclude they could be the cause but the power supply relay doesn’t close
Yes, I guess it’s not the smartest solution to limit current before it goes into it’s own limiting circuit but after replacing the capacitors and transistors in the relay circuit the bulb glows even brighter than before, on top of that the audio channels are disconnected from the +/-60v power and should only be getting 12v so i don’t understand why it draws so much current.
If i connect it straight into mains what’s the worst that happens without a limiter? I just blow the fuse right?
If i connect it straight into mains what’s the worst that happens without a limiter? I just blow the fuse right?
well if the audio channels are disconnected how are you emulating or recreating the signal conditions to operate the relay circuit?
it is strange that the current draw has increased...i was going to suggest an incremental increase in your limit to see if that changed conditions or operation but now that seems ill advised.
it is strange that the current draw has increased...i was going to suggest an incremental increase in your limit to see if that changed conditions or operation but now that seems ill advised.
The point is that there is one relay after the rectifier and then one on each output. When i tried completely unplugging the rectifier, leaving only the 12V connected all 3 of them flicked on. So after changing these components I wanted to see if by only powering the rectifier the soft start would switch after a few seconds but it doesn’t. Do you think it needs the audio channels to be attached in order for any of them to work?