Re: [time-nuts] HP 53131A display dim
Hi With only one or two digits - check the connections and make sure it’s not a driver issue. (Yes, it’s a custom part so either you get a parts unit counter or a HP spare part). Bob > On Nov 9, 2015, at 1:12 PM, cdel...@juno.com wrote: > > Hi, > > Thanks for the replies. > > Only a couple digits are dim so I guess it must be the VFD? > > I suppose the only source is to find an otherwise dead unit to strip it > out of? > > Corby > > ___ > 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] HP 53131A display dim
Hi, Thanks for the replies. Only a couple digits are dim so I guess it must be the VFD? I suppose the only source is to find an otherwise dead unit to strip it out of? Corby ___ 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.
Re: [time-nuts] HP 53131A display dim
This may sound silly but aside from the failing capacitors that cause displays to dim, the emissions falling and other esoteric issues, in my years repairing VCRs with VFDs I most often found a good clean of the glass and bezel would improve the brightness a considerable amount. On 9 Nov 2015 05:30, "Chuck Harris" wrote: > The biggest cause of failure with VFD's that I have seen > is the filament voltage drops too low. Usually it is a bad > capacitor in the supply, or a drifting resistor on the regulator. > > I have a VFD on an alarm clock made by GE back in 1980 that > has been running 24/7 since it was bought, and is still way too > bright. I make my wife prop something to block it so that it > doesn't keep me awake. > > -Chuck Harris > > cdel...@juno.com wrote: > >> Anyone know about these displays? >> >> If the display is getting dim do I need a new VFD module? >> >> Thanks, >> >> Corby >> >> ___ >> 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.
Re: [time-nuts] HP 53131A display dim
The biggest cause of failure with VFD's that I have seen is the filament voltage drops too low. Usually it is a bad capacitor in the supply, or a drifting resistor on the regulator. I have a VFD on an alarm clock made by GE back in 1980 that has been running 24/7 since it was bought, and is still way too bright. I make my wife prop something to block it so that it doesn't keep me awake. -Chuck Harris cdel...@juno.com wrote: Anyone know about these displays? If the display is getting dim do I need a new VFD module? Thanks, Corby ___ 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.
Re: [time-nuts] HP 53131A display dim
Hi It’s either the VFD or the supply to the VFD. Mostly it’s the VFD. A quick check with a DVM will verify if the supply is doing ok. Bob > On Nov 8, 2015, at 3:51 PM, cdel...@juno.com wrote: > > Anyone know about these displays? > > If the display is getting dim do I need a new VFD module? > > Thanks, > > Corby > > ___ > 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] HP 53131A display dim
Anyone know about these displays? If the display is getting dim do I need a new VFD module? Thanks, Corby ___ 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.
