RK05 question & stuff FS/T

From: Tony Duell <ard_at_odin.phy.bris.ac.uk>
Date: Wed Dec 17 11:49:57 1997

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
Received on Wed Dec 17 1997 - 11:49:57 GMT