Panaplex display history
Christian Corti
cc at informatik.uni-stuttgart.de
Mon Jun 1 04:03:26 CDT 2015
On Sat, 30 May 2015, Jon Elson wrote:
>> Is there a good reason why filament lamps were used on minicomputer
>> front panels until the mid 1970s? Things like the PDP11/45, Philips P850,
>> etc
>> all used filament bulbs, not LEDs.
>>
> Inertia! The 11/45 was designed before LEDs were available, and so they
> never changed. To do it right, the PC board would have to be re-designed to
Hold on! Most 11/45 have LED frontpanels (such as mine from 1974). The
earlierst ones might have bulbs, but they switched to LEDs during
production.
Christian
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