20-09-2019, 10:59 AM
Yes the PY81 will work fine... I've done it.
The top cap cathode might be a shock hazard as others have said... But if you can make an insulator for it (even out of a plastic bottle top) then the problem goes away.
No reason not to use the transformer as you have said, though personally I would rather take the secondary direct to chassis with the rectifier in the other lead. Why? Because any mains interference can get coupled to the secondary due to the capacitance between windings, and I'd rather it had a path direct to chassis than a path direct to HT+.
The top cap cathode might be a shock hazard as others have said... But if you can make an insulator for it (even out of a plastic bottle top) then the problem goes away.
No reason not to use the transformer as you have said, though personally I would rather take the secondary direct to chassis with the rectifier in the other lead. Why? Because any mains interference can get coupled to the secondary due to the capacitance between windings, and I'd rather it had a path direct to chassis than a path direct to HT+.
