com> on behalf of Mark Sims
<hol...@hotmail.com>
Sent: Tuesday, May 9, 2017 5:25 PM
To: time-nuts@febo.com
Subject: [time-nuts] Looking for a HP-58503 display
I looked closely at the display and can see unused annunciators for frequency,
us, period, etc. So the display is the same as used
I was looking at the 34401A service manual. It shows the VFD pinouts. Looks
like 18 pins topside and 16 pins bottom side and is a 14 seg display. I also
looked at the 53132A manual. The 53131/53132/53181 counters use a 14 seg
display with 18 pins top and bottom.
The 58503B is 14 seg with
It's the exact same display module as in the 53131A/53132A. It's a Samsung
INB-12MM53T, Keysight part number 5040-0023. The VFD part itself is an Itron
CC1187G.
I've also found a possible part number for the VFD as an Itron CP3033A
(although that might be the VFD for the 34401A, which would
Internet Fishing expedition, produced some cross-references :-)
Keysight 34401 DVM --> Service Guide, page 133.
http://www.keysight.com/upload/cmc_upload/All/34401-90013-mla2.pdf
34401-66512 – Display Assembly (A2)
Vacuum Florescent Display (VFD) was OEM CP3033A (Noritake part).
Noritake VFD
Mark -
Keysight MAY have that spare VFD still in stock (German office supposedly had a
few).
Several HP-34401A DVM owners have used that Chinese source for replacement.
The display model being sold appears to be: SAMSUNG SSVD INB-12MM52T
Good luck !
greg
> I looked closely at the display and
The problem isn't a cathode or power supply problem. It is a phosphor problem.
Selecting a display mode that lights up characters that are not on the
default time display shows nice and bright characters there.
The display is a 12 character 14-segment display. There is a possibility that
I looked closely at the display and can see unused annunciators for frequency,
us, period, etc. So the display is the same as used in at least one of their
frequency counters. It has 12 alphanumeric digits.
___
time-nuts mailing list --
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
On a (slightly) related note, I have a Futaba DRO on my milling machine.
The VFD display, as you mention, had grown very dark from being left on
constantly. As it was a simple display with 6 7 segment digits, conversion
to LED was actually pretty easy. It took about 4 hours one Sunday
afternoon.
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
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
I recently got in an HP-58503B GPSDO from a local equipment liquidation
auction. I had to pay too much, but wanted one to verify Lady Heather's
support for the HP GPSDO's. It powered up at the equipment auction preview.
but not when I brought it home. After replacing the power supply with a
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