Nixie Veterans, I'm looking for advice: I thought some of you here might have dealt with MAX1771 and know its quirks.
I've built a power supply based on Nick de Smith's excellent web page. I added a voltage doubler (for dekatrons), and a couple of linear stabilizers for other circuitry. I also built a larger current version (large inductor, RSENSE of 25mOhm). I tried to follow the PCB design advice very carefully. I have a supply that kind of works, but I get a large sawtooth-like ripple on the output. The ripple is 17V peak-to-peak at 170V and the frequency is 23-80Hz (depending on the load). I'm loading the PSU with 25kOhms of resistance, which should pull 6.8mA -- so this is not an unloaded run. The ripple frequency seems to change with the load, the amplitude remains the same, though. Smaller loads seem to decrease ripple frequency, larger loads increase it. I expected to see a ripple of 1-2%, but not 10%. Something seems to be wrong. Any ideas or suggestions on where to look now? --J. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
