On 29/06/2011 22:59, Ethan Dicks wrote:
On Wed, Jun 29, 2011 at 5:45 PM, Pete Turnbull
<pete at dunnington.plus.com> wrote:
> Some pictures can be seen at
http://tinyurl.com/5w4l6uv
Does anyone have any lamp information on the indicator panels? I have
one (courtesy of a list member) that was gifted to me with no lamps
and I'd like to do something interesting with it someday (including,
most likely, building LED lamp replacements vs buying dozens of $2
bulbs).
I can't help directly, but I think they are either OL-1 or OL-2. If
Ed's unit is full of LEDs, it has probably been converted, most likely
in the same manner as one of my PDP-8/Es. That has a DEC mod which
consists of snipping (or unsoldering) one end of the trickle resistor,
and replacing the lamp with a 5mm LED that has one leg cut very short
and fitted with a miniature resistor to limit the current. The
resultant LED+resistor fits into the existing lamp sockets. If Ed's is
like that, looking at the resistor should tell you the value, which is
really all you need to know.
--
Pete Peter Turnbull
Network Manager
University of York