300V DC supply

[LukeW]

I’m looking for a power supply module with moderately high voltage.

0-300V adjustable
150mA out
Flat DC
I might be able to compromise a little on the current if I need to, definitely 100mA out at least.
Connector doesn’t really matter. SHV or MHV or insulated banana jacks or whatever.

Making one is kind of the last resort if I have to.

Could anyone recommend where to buy something suitable?

[ivaylo]

ebay.

This one just closed - https://www.ebay.com/itm/HP-Agilent-6186C-Power-Supply-300-V-AT-1-Amp/263890397669?epid=1904113194&hash=item3d7117e9e5:g:DZ0AAOSwqLxbez8a

Or I don’t see them that often, but a couple of years ago I got a Matsusada RK-80H 0-320V 200mA PSU for a bit over $100 also on ebay.

[jbb]

Hmm

I'd be surprised if Magne-Power, Keysight (aka HP aka Agilent) or Tektronix can't sell you something.

Also, sorry to be a worry wart, but be careful when using such a supply.  They will spit out lethal voltages and can do so by surprise depending on the control settings.  For example, some supplies will turn their outputs on when you turn on main power at the wall (depends on settings).  This can be extremely surprising when you just wanted to check the settings.

[PointyOintment]

Maybe either an old vacuum tube bench power supply like Heathkit used to (let you) make, or a used electrophoresis power supply. Electrophoresis power supplies usually are not isolated, with positive and negative outputs that are symmetric about earth ground, but without a terminal for ground, which makes them hard to work with. Also, their intended application isn't really sensitive to noise, so they might be noisy.

[Mechatrommer]

Making one is kind of the last resort if I have to.

LMETFY

[coppercone2]

i have a sorensen that meets this spec pretty much

[floobydust]

I used Xantrex HV DC power supplies XFR600-4 600V 4A, and see there is also XHR600-1.7 600V 1.7A.
They discontinued the line, but some on eBay. B&K Precision 9185B also discontinued 0-400V 0.5A

[digsys]

.... Making one is kind of the last resort if I have to ...

IF you don't need any fancy DC / control etc you can use a variac > isolation transformer > full bridge > current limiting (as required)
I've done this on a few occasions - 1A right up to 10A. You can even get DC controlled variacs and have a full feedback loop.
It is actually a very efficient / simple trick - if suitable.

[Gyro]

Maybe either an old vacuum tube bench power supply like Heathkit used to (let you) make, or a used electrophoresis power supply. Electrophoresis power supplies usually are not isolated, with positive and negative outputs that are symmetric about earth ground, but without a terminal for ground, which makes them hard to work with. Also, their intended application isn't really sensitive to noise, so they might be noisy.

Electrophoresis power supplies tend to be sluggish in their regulation - under and overshooting very badly on step load. Not all of them are center grounded though, I have an Amersham Biosciences EPS 301 which has floating output, 5-300V, 0-400mA, 4mm sockets and without ground leakage detection. I still need to play around with the analogue filter time constants to see if I can get it to operate as a regular psu, hopefully response speed isn't bound up in the micro. There are a few of them kicking around on ebay but not as cheap as I got mine!

Note: all of the others in the range have ground leakage and no-load sensing.

https://www.eevblog.com/forum/chat/what-did-you-buy-today-post-your-latest-purchase!/msg1304744/#msg1304744

Internal and catalogue:

https://www.eevblog.com/forum/projects/gel-electrophoresis-power-supply-design/msg1459904/#msg1459904

[coppercone2]

i heard those electrophorisis supplies are basically shit for electronics work

[coppercone2]

I used Xantrex HV DC power supplies XFR600-4 600V 4A, and see there is also XHR600-1.7 600V 1.7A.
They discontinued the line, but some on eBay. B&K Precision 9185B also discontinued 0-400V 0.5A

i think sorensen used to be them or vice versa

[Wolfgang]

I’m looking for a power supply module with moderately high voltage.

0-300V adjustable
150mA out
Flat DC
I might be able to compromise a little on the current if I need to, definitely 100mA out at least.
Connector doesn’t really matter. SHV or MHV or insulated banana jacks or whatever.

Making one is kind of the last resort if I have to.

Could anyone recommend where to buy something suitable?

I did not find something smart either, so I homebrewed one, like here:

electronicprojectsforfun.wordpress.com/power-supplies/high-voltage-lab-power-supplies/a-250v-150ma-variable-linear-power-supply/

mine is 250V 150mA but if you find a proper transformer the design could be used for higher voltages.

Maybe that  helps
  Wolfgang