Thanks all. I can do all these checks.
On Monday, 29 August 2022 at 09:14:28 UTC+1 Jeff Walton wrote: > Check for noise on the HV supply. > > I've had a couple clocks with the he same drivers where the main capacitor > for the switching supply started to fail after a few years. The failing HV > cap was allowing a lot of noise on the HV line. The VOM readings looked > normal but as soon as I put it on a scope, I saw the issue. This was after > I had already replaced the MPS42 and MPS92 transistors thinking they were > leaky. A new cap in the HV circuit made all of the glow disappear. > > > *Jeff* > > -------- Original message -------- > From: Nigel <[email protected]> > Date: 8/29/22 2:35 AM (GMT-06:00) > To: neonixie-l <[email protected]> > Subject: [neonixie-l] New faint glow with IN-12Bs > > Hi > > I've been using my own IN-12 design for a couple of years. No > multiplexing and based on the usual K1551 drivers. I have an SD card with > a config file that includes the active hours and the clock looks great > during those periods. However, I've noticed recently a faint glow when > they digits are blanked. > > The PCB with the Nixies was made with the appropriate clearance design > rule. > > I use one of those eBay boost converters to get the 180V. > > Any ideas why this could be please ? > > Thanks[image: IMG_8615.JPEG][image: IMG_8616.JPEG][image: IMG_8617.JPEG] > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/1e1afdf7-6d98-4440-a3c4-1f3240048581n%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/1e1afdf7-6d98-4440-a3c4-1f3240048581n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/21b229fb-d797-498f-a194-b9992e549a93n%40googlegroups.com.
