Panaplex display history
bqt at update.uu.se
Sat May 30 15:52:45 CDT 2015
On 2015-05-30 19:40, tony duell wrote:
>> LEDs themselves weren't all that much more costly than the typical pilot
>> lamp. I recall sending $1 cash to Montsanto and receiving 2 red (was
>> there any other color?) LEDs in return in 1969.
> 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.
By the 11/70, as well as the PDP-8/M and PDP-8/F DEC had switched to
LEDs. So they switched before 1975.
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