When I turned it back up the psu got stuck in the 5v-13v range. I had just had the TC throwing a good bit of plasma from 30v input and turned the voltage down to 0v to make a change on the topload. So while I am looking at the relay driving setup is there anything else I should check while I'm in there? The most obvious issue is the relays not switching to different secondary as the range voltage is adjusted or if the current demand goes up. The op-amps I could get a probe to and the pass transistors all seem to be ok. I'm still in the process of removing the boards, so pics soon. I was playing with a SSTC that was running from it (yes yes very silly of me, I have a variac for that stuff)Īnyhow now the relays in the PSU don’t switch. I have a 60v 5A cc cv PSU I got from chinabay.
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