17 Dec
1997
17 Dec
'97
6:49 a.m.
On Wed, 17 Dec 1997, Richard A. Cini wrote:
The T 1-3/4 size exists here in the US, too, but I
most frequently I see
it in referring to LEDs. The T 1-3/4 incandescent bulb size is E-5 (for
5mm), I think.
It's almost the opposite here - LED's are called 5mm (or occasionally E5),
bulbs are T1-3/4...
Anyway, so long as I am replacing these lights, why can't I replace them
with amber LEDs? I figure that I can plug an LED-resistor combo into the
All my RK05's have little DEC 'modules' containing an LED and a resistor
in place of the bulb. Most of them are red LED's, I think, but my RK05F
has yellow ones (apart from the 'fault' lamp, of course).
same socket and tune the brightness with the resistor.
I remember reading
somewhere that the lamp power is 8v. I'll test it first, but does this sound
right?
I can't remember what the lamp supply is, but it's probably either 8V or
15V (there's certainly a +15V line in the drive). If you can wait a few
days I'll look in the printset for you.
I don't think there's a pre-heat resistor for each bulb in the RK05 (there
generally is on CPU front panels from DEC), but if there is you'll need to
remove it.
Thanks for the info, Tony.
Rich Cini/WUGNET
-tony