4 May
2005
4 May
'05
4:46 p.m.
Subject: Re: Seven Segment Displays
From: ard at p850ug1.demon.co.uk (Tony Duell)
Date: Wed, 04 May 2005 23:30:20 +0100 (BST)
The name 'minitron' seems to be floating in my brain for some reason...
They could well be incandescent. I've seen such devices in a 16 pin DIL
package, in a smaller package with 9 socket contacts on the back arranged
like a miniature DE9 connector (those are used in the ICL Temiprinters
for the column display, for example), and in a wire-ended valve-shaped
envelope.
I have a bunch of them too. Four are in a counter I made back in 73,
the rest are spares for it. Actually they are fairly nice and at about
10MA brighter than leds of the time (I must ahve a dozen MAN-x series
LED 7 segments as well).
FYI: those things are considered rare as hens teeth as most systems
that use them have burnt them out. One series of ARC (used in cessna
aircraft) radios had them as they were bright enough for day use
and I hear they cost about 100$+ per digit to replace.
Allison