Generate voltages up to 400 V and trace characteristics curves for valves and transistors
High-Voltage Power Supply with Curve Tracer
This universal high-voltage power supply is capable of providing power to valve circuits. It can also be used to trace the characteristics curves of valves and semiconductors. The unit is controlled by a Raspberry Pi equipped with a seven-inch touchscreen.
Discussion (0 comments)
jcmaxwell 4 years ago
Or am I just overlooking the download link(s) in the page?
Jorge M.L. Goncalves 4 years ago
Inch-o 2 weeks ago
With valves(tubes) there is one major problem(issue)... They are, input wise, Hi impedance devices.
Long wiring and high impedance can be problematic, leading to high frequency oscillations...
Before doing any measurements on them(valves/tubes), all the wiring between the main unit and test adapter, should be fitted with HF ferrite beads(installed on the wires, right at the tube socket).
Also the G terminals of the power mosfets should have the so-called grid/gate stopper resistors fitted in series, right at the mosfet gate...
The wiring for the heater should be kept thick(EL34 for example needs some hefty heater current, with the cold heater consuming even heftier peaks). I don't know if some kind of soft start(ramp up) of heater voltage or maybe constant current method is provided.
As said, a remarkable project - congratulations!