On Nov 24, 21:22, Ethan Dicks wrote:
--- ajp166 <ajp166(a)bellatlantic.net> wrote:
> From: Ben Franchuk <bfranchuk(a)jetnet.ab.ca>
> >What about using white leds?
> >Ben Franchuk.
> Why? Back then when the led mod was common red was the only
> available visible color for leds. White leds are a bit blue rich
> they would work. One point is that there are
some 28 or so leds/lamps
> and good ones will not be cheap and cleap ones will not be good.
Agreed. The LEDS are water-white plastic, but red-emitting. Each has its
leads cut short, about 1/8" from the body, and a small 430R resistor
soldered to the cathode and a wire (probably the trimmed-off resistor lead)
to the anode. (Is this what some people have described as an "LED module"
or is that something more substantial?) They then fit into the bi-pin lamp
sockets. The resistors look like modern miniature metal film, but could be
20 years old.
Similar red LEDs cost pennies, maybe 10p. 25p - 35p with integral
resistor. Bi-pin bulbs of about the right voltage/current/intensity cost a
bit more, about 50p each here. I did think about white LEDs, but they cost
over ?3 each. As Allison says, I would need 28 (plus a bag of spares if I
use lamps) and white LEDs give off a very cold bluish light, quite unlike
the slightly yellow lamps. I thought about yellow LEDs, but they're much
*too* yellow. Then I thought about pairs of LEDs, but that's just getting
At about $3/each, yes they are expensive, but only
than real DEC lamps. Personally, I'd go with
either red LEDs or bulbs,
since that's what's appropriate for the period.
I think I'll stick with the existing LEDs and maybe "save up my pocket
money" to buy 40 or so bulbs (28 plus a dozen spares).
Pete Peter Turnbull
University of York