170V DC High Voltage Power Supply Module Boost Converter for Vacuum Tube, Nixie Tube Clock, Magic Eye 6E2 Level Indicator 10V-24VDC Input, 90V-250V DC Output (Blue)

Good

Item worked perfect and as stated. Received quickly.

Worked great till a resistor burned up. There were no shorts found in the circuit.

Good unit. Using for NIXIE project. Tested. Bought two. Both work fine. Remember, the voltage at the output is high. Even though the current is low you can still get a bite! Use caution especially if you have a pacemaker! Things get really exciting then! LOL

Would buy it again in the future.

I don't know if the circuit on the other flavors of this board is better, but the "black" board version is garbage.I'm 0-2 on these things. I've built linear power supplies in the past. There is nothing special about them. But they're big, heavy, and inefficient, so I tried to take a short cut. It turned out to be a waste of time.The first one, 12V input, 11V output. Adjustment did nothing.Exchanged for a 2nd.Exact same thing - 12V in, 11V out, no adjustment.And oh, to the person who designed this board, would it have killed you to add a 2nd mounting hole?

I believe this was made for Nixie clocks. Check your power requirements. Forget about powering 12Ax7s.

I used this to power a single 12AX7 in a bass preamp. Works like a charm!!