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Hell yes.... hundreds of supplies 2, 3, 4, 5 ouputs. Voltages up to 600V, currents up to 150A, power up to 3KW.Tell me what you want and what your budget is and I'll tell you what's available.
Quote from: TopLoser on September 23, 2017, 04:18:49 pmHell yes.... hundreds of supplies 2, 3, 4, 5 ouputs. Voltages up to 600V, currents up to 150A, power up to 3KW.Tell me what you want and what your budget is and I'll tell you what's available.I'd be interested in hearing about your 600V power supplies...
I'm almost scared to ask how much you want for that... is it a case, that if I have to ask, can't afford?
You can have one of these in unknown condition for £60 shipped....http://uk.farnell.com/digimess/hy3020/power-supply-1ch-30v-20a-adjustable/dp/4283235Be good for parts if it doesn't work, shame it tops out at 25A though.
Quote from: TopLoser on September 25, 2017, 09:19:06 amYou can have one of these in unknown condition for £60 shipped....http://uk.farnell.com/digimess/hy3020/power-supply-1ch-30v-20a-adjustable/dp/4283235Be good for parts if it doesn't work, shame it tops out at 25A though.That'll certainly give me enough current to run the legal limit for my licence class right now so yes please, I'll send funds and details over when I get home tonight.
I've also got some PSP603 versions, 0-60V 0-3A for the same price.
Quote from: TopLoser on September 23, 2017, 02:00:42 pmI've also got some PSP603 versions, 0-60V 0-3A for the same price.I think I want one... Do these have the binding posts or the (awful) recessed banana sockets?
Quote from: CJay on September 25, 2017, 10:51:14 amQuote from: TopLoser on September 25, 2017, 09:19:06 amYou can have one of these in unknown condition for £60 shipped....http://uk.farnell.com/digimess/hy3020/power-supply-1ch-30v-20a-adjustable/dp/4283235Be good for parts if it doesn't work, shame it tops out at 25A though.That'll certainly give me enough current to run the legal limit for my licence class right now so yes please, I'll send funds and details over when I get home tonight.I would have bought it for repair had you not done so - but then I already have two under the bench awaiting attention.If failed then go straight for the output transistors before anything else - these PSUs really like to blow up one or more of the pass transistors.Teardown & some notes here https://www.eevblog.com/forum/testgear/digimess-hy3020-teardownreview/. I have the schematics somewhere if you need.The 2N3055 output transistors are almost certainly outside their thermal envelope at high currents and peak voltage drop (not sure what the drop across the output transistors will be at 13.8V out). I change for 2N3773, MJ15015 is another possibility. I also put a meaty reverse biased diode across the pass transistors as they don't have any protection for voltage applied to the outputs (eg if there is a hefty capacitor somewhere).
I'm very interested in the full schematics, even if a faulty one doesn't turn out to be viable as I've got a couple of *massive* toroids that could be pressed into service if necessary. I had a read of that thread too, there's half a sort of schematic in there and I'm nurturing a mad scientist thought that it *may* be possible to parallel those series windings and get even higher current out of what is already a monster of a supply but as yet I don't know what the secondaries are. Definitely needs better diodes and more capacitor though