Panaplex display history
ard at p850ug1.demon.co.uk
Sat May 30 12:40:42 CDT 2015
> 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.
More information about the cctalk