| Electronics > Projects, Designs, and Technical Stuff |
| Voltage regulator tubes vs zeners (tubes has BETTER stability) |
| << < (4/4) |
| T3sl4co1l:
VR tubes are not good choice, it oscillate! Depends on what's connected to it, and in the case of the TL431, how it's connected too. Which circuit did you follow? Tim |
| Zero999:
--- Quote from: 001 on December 21, 2019, 04:08:56 pm ---In fakt TL431 is not good choise for HV circuit it oscillate :horse: --- End quote --- Was it connected in the cascode configuration I suggested above? I fount it was stable, but larger, slower transistors can cause additional phase shift and oscillation. Try adding an emitter resistor. https://www.eevblog.com/forum/projects/tl431-common-base-amplifier-stability/msg606605/#msg606605 |
| iMo:
--- Quote ---LM723 has a buried zener reference so it's nice and quiet. --- End quote --- Nope, no burried zener there. And pretty noisy. |
| iMo:
Here is the Zero999's cascode with "most accurate ED TL431 model". |
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