You're welcome. You don't have to use an oil-filled smoothing capacitor. Many use a stack of electrolytics (same mfr & pn, from the same batch, with individual bleeder/equalizing resistors). I suggest you stack some common 1N5408 (3A/1KV) or 6A10 (6A/1KV) rectifiers. The separate plate supply for my 160m 1500W amplifier will use 6A10s with a transformer I rewound, and a stack of ten 450V electrolytics. The calculations indicate 1.5A capability, with taps to provide up to 4KV (using a full wave doubler rectifier):
Originally Posted by 2E0ILY
It came to me from a piece of medical equipment, with a split nylon bobbin (excellent primary-secondary isolation). Secondary DCR = ≈ 5.8Ω. LTSpice simulation with a 1A pulsed load indicates very good dynamic stability. Expected IP = 785mA. Thanks to XQ2FOD and others for info & design tools.