From my thermionic valve days, the emmissivity of a filament was greatly extended by under-running them. If the display is pemanently run at a lower current in dim mode, how long could the life be extended by dropping the filament voltage by a small margin? cheers, Neville Michie
On 18/07/2008, at 8:35 AM, [EMAIL PROTECTED] wrote: > I too have never seen one go dim. In fact, I have a VCR (Beta!) > that's been pluged in continously since I got it new in the early > '80s. It still looks the same as when I got it except that the > display has had a left to right wave going through it since about > 1995. So, wavy- but not dim at all. > > -Dave > > > -------------- Original message -------------- > From: Jeffrey Pawlan <[EMAIL PROTECTED]> > >> Regarding the VFD display, although they may be very different one >> manufacturer >> to another, I can definitely dispute a prior statement made that >> VFDs in general >> have a short lifetime and become dim. They are universally used in >> VCRs, DVD >> players, microwave ovens, and some clocks. I have never had one >> become dim or >> burn out. The displays in my appliances are on even when the rest >> of the >> appliance is off. I have never seen one become dim even after 15 >> years of >> on-time. >> >> I look forward to your project. >> >> >> 73, >> >> Jeffrey Pawlan, WA6KBL >> >> >> >> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/ >> listinfo/time-nuts >> and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/ > time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.