High-Voltage Power Supply Module DC-DC ±45-390V Adjustable Step-Up ZVS Capacitor Charge Ultra High Voltage Adjustable Output

I needed to subject high voltage vacuum tubes to gradually increasing DC voltage. It is called "re-forming" tubes and you do it for tubes that have sat on the shelf for a long time. I hooked this DC-DC convertor to a 30V DC source and reformed the tubes at 100VDC, 200VDC, 300VDC and 390VDC for hours each. Never got too hot (I limited the current with a resistor). Worked fine. Caution: there's a fair amount of noise on the output--it isn't hifi quality DC, so you might want to add choke- and/or capacitor-based filtering to smooth out the output. I didn't need that, hence the 5 starts. For the price it is tops.

Fast shipping, well built, but are these 4 leads supposed to be soldered? Easy fix if they are.

Work as expected and expressed. However they're much better than was explained or expected. Once you've put the neccessary extras that's also found here they can be used to support emergency services during a storm with only 6+ volts to operate, or in using a 3v to 12v source they're even much better to use to handle mall electronics and lighting at q10 voltage to higher, then with any of the Ampage boosting units they'll even power much stronger electronics including refrigerator and ac units at the set state of electrical compasity

Large inrush though on start, lots of parasitic drain.If you're using it to pulse something use a big cap on on supply side and 2x relay board to switch the in and the out. Power up 2 sec before you need it, and 2 sec after done power back off.I used it to ring an old desk telephone (90vac 20hz) via an ARM board using 2 GPIO lines to do the above, using the relay itself to PWM the bell. Works fine.

Worked great for a while and then inexplicably just stopped putting out high voltage just outside the return window.

It only charges my capacitors to 150v.

The media could not be loaded. Can drive several nixies at a time. I've bought two of these now.

Its great for charging caps to high voltage quickly which is what I needed it for. I was slightly worried about the quality of construction since what looks like an automotive fuse is precariously soldered to the board. Hence 4 stars instead of 5.