[time-nuts] Looking for a HP-58503 display

Mark Sims holrum at hotmail.com
Wed May 10 02:10:13 EDT 2017

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 18 pins top and bottom.  It appears to be the same display as used in the 53131/53132/53181.  Shining a light into the display window shows all the enunciators that the 53132 has.

It looks like the 34401A display could be made to work, but would probably require some pin origami.

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