Re: [neonixie-l] Digest for neonixie-l@googlegroups.com - 4 updates in 1 topic

[Neil Harrison]

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On 29 Nov 2023, at 07:43, neoni...@googlegroups.com wrote:



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• Scope Clock with 3LO1i - 4 Updates

Scope Clock with 3LO1i

Grahame <graham...@googlemail.com>: Nov 28 05:05PM I would guess that the bright spot is where the beam rests after drawing the face and is waiting for the next refresh trigger.   My own scope clock draws each face once every 20mS (16.66mS in 60Hz land) synchronised to the mains.  If a particular face takes, say, 8mS to draw then the beam is parked somewhere and left blanked for the remaining 12mS (in this example) waiting for the next face refresh trigger. So if the beam is left on for the waiting period then it will appear as a very bright spot at the parked position. You'd have to investigate the software you're using for what triggers the face drawing and what happens in the waiting period.   Grahame   On 27/11/2023 22:50, Max DN wrote:

Instrument Resources of America <IRACO...@HUGHES.NET>: Nov 28 10:15AM -0800 Be careful not to burn a spot on the screens phosphor coating. High intensity, coupled with length of time in one spot is what determines if a burn occurs.   Ira.     On 11/28/2023 9:05 AM, 'Grahame' via neonixie-l wrote:

Max DN <flata...@gmail.com>: Nov 28 11:34AM -0800 Yes, of course. Thank you   Il giorno martedì 28 novembre 2023 alle 18:15:39 UTC Instrument Resources of America ha scritto:

Max DN <flata...@gmail.com>: Nov 28 11:49AM -0800 I agree, that bright dot must be the beam resting on the same spot for too long. I'll check the code, where the refresh seems to be driven by the blanking pin, so with no blanking currently connected (still missing a part), the dot is not been managed.   I thought that the same settings as for 3RP1A would work on 3LO1i but I guess not, they must have different physical characteristics.     Il giorno martedì 28 novembre 2023 alle 17:05:12 UTC Grahame ha scritto:

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