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I have a short ( i think) and don't know where to start
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Hextejas:
I am building this  power supply and so far I have exploded 8 diodes, mur860. I tried narrowing it down but I am stumped.
When I attach diodes 1-4, it seems to be ok, but when i attach diodes 5-8 and apply the power, then WHAMO ,!
A MUR860 has caught fire or exploded or somesuch. Scary.
I have tried it with lesser voltage as mains. This is with a light in between.  It furnishes 52VAc but apparently is not enough for the transformer.
The transformer is furnishing 38VAc into the diodes.
So,,,,,where to begin ?
I ordered 20 more MUR860s but they won't be here until next week.

Thanks for the guidance.
Andy Watson:
Can you confirm that the transformer has two isolated secondaries rather than a centre tap ?
There's not much else to go wrong.
PA0PBZ:
Did you mount the diodes isolated? The flange is connected to the cathode so if you just mount them on a heatsink the result can be 'interesting'.
Hextejas:
well, I dont know exactly. The xformer has 4 wires coming out of the secondary.
This is it, 500va https://4donline.ihs.com/images/VipMasterCap/Capacitor/AVEL/AVELS00030/AVELS00030-1.pdf
Hextejas:
I dont know what you mean by isolated. I have a pcb that includes the diodes.

And a question.
What would happen if a diode leg was not connected at all, or if the diode was completely dead or missing ? Obviously the board would not work, but would it act like it was shorted ? Smoke and fire and scary ?
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