jonelson126 at gmail.com
Fri Aug 4 08:43:22 CDT 2017
On 08/04/2017 02:24 AM, Rod Smallwood via cctalk wrote:
> Programmers console is in its slot. Bad bulbs (not LEDs) have been
> Power up and all the lamps come on either bright or dim (off) except
> the RUN light.
> So questions:
> 1. Should the run light glow dimly?
Probably all lights should glow very dimly. DEC put a resistor across
the transistor to put a slight warming current through the bulb. This
reduces shock to the filament every time it is turned on.
(This info is from other DEC machines, not PDP-8, but I'm pretty sure
they would do the same there.)
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