If you're looking for a modern display screen that is easy to interface to and drop-dead beautiful, check out the OLED modules. But on-life is extremely limited, often after one or two years defects become visible - not for an always-on application.
Tim N3QE Sent from my VAX-11/780 > On May 9, 2017, at 4:21 PM, Chris Albertson <albertson.ch...@gmail.com> wrote: > > I've read about people making a replacement using a large LCD graphic > screen. A micro controller reads the data lines going to the old display > and draws characters on the modern screen. Not total rocket science to > implement but still it would easier to buy try the easy fixes first (check > cap, transistors and such or even buy a "for parts not working " unit from > eBay. But the only units do look nice with a new cell phone screen > >> On Tue, May 9, 2017 at 12:42 PM, Gregory Beat <w...@icloud.com> wrote: >> >> Mark - >> >> Option 001 for the HP-5803B GPSDO >> featured a 12-character (alphanumeric) Vacuum Fluorescent Display (VFD). >> It appears to have been a custom VFD for HP / Agilent (Colons used in time >> display). >> http://www.leapsecond.com/museum/hp58503a/097-58503-13-iss-1.pdf >> >> Noritake Itron Corp. (Ise Electronics Corp.) of Japan invented the VFD >> technology in 1967. Noritake, Newhaven, Futaba, Samsung, and a Chinese >> mfg. are the 5 major mfg. >> Three of these companies have their North American HQ offices here in >> Chicago area. >> >> Futaba in Schaumburg >> http://www.futaba.co.jp/en/display/vfd/lineup.html >> >> Noritake Itron Company in Arlington Heights >> https://www.noritake-elec.com/ >> >> Newhaven Display in Elgin >> Company is more of an East Asian importer, but handles custom runs. >> http://www.newhavendisplay.com/vfd-c-586.html >> >> VFD do have a finite life, and darken as they age. Samsung states 30,000 >> hours to reach it 80% level (brightness). You stated your unit has 83,000 >> hours. >> DOUBLE CHECK DC Power and electrolytic capacitors associated with circuit, >> this has been known issue with commercial consumer appliances with VFD. >> The mfg. date on your unit may have been during "bad caps" decade. >> >> greg >> w9gb >> == >>> I recently got in an HP-58503B GPSDO from a local equipment liquidation >> auction. >>> The unit has 83,000 hours of run time. I think it was last powered up >> in 2013. >>> >>> The display (VFD) is a bit dim and blotchy. >>> Does anybody have a replacement display that would look better? >>> - Mark >> -- >> Sent from iPad Air >> _______________________________________________ >> 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. >> > > > > -- > > Chris Albertson > Redondo Beach, California > _______________________________________________ > 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.