On Jan 29, 6:22, Ethan Dicks wrote:
> > Sounds like a standard T1_1/2 (about 3/16" diameter) or T1_3/4 (about
> > 1/4" diameter) wire-ended bulb. There are still a few companies that
> > make them.
>
> If I had to guess, I'd go with the 1/4" diameter. These are larger
> than PDP-8/L or RL01/RL02 bulbs.
The bulbs in RL02s aren't "wire-ended", they're 14 volt T1_1/2 "wedge base"
bulbs. Wedge base bulbs are common in motor vehicles. Unfortunately 14V
is hard to get (except in T1_3/4 size), but I used 12V ones in my RL02s --
they're just a bit brighter. Farnell part no 328-960, made by SLI (for
whom someone posted a URL). I got some low-current 12V ones made by VCH as
well.
> > > If DEC was underfeeding these bulbs to extend their life, I would
> > > expect that the bulb should be rated at 14V-16V.
>
> > The Farnell catalogue lists a few that are 14V. The correct bulbs for
my
> > RL02 drives are 14V, fed from a 12V supply, as you say.
>
> >From a conversation with Jeff Russ, a PDP collector from Indiana, it
> seems that the bulbs are 28V, underfed to 12V-14V. He found some
> similar bulbs at a hamefest once, but they drew double the current
> of the originals.
Dunno about bulbs for a PDP-8 but spare RL01/2 bulbs I got from DEC are
definitely 14V.
--
Pete Peter Turnbull
Network Manager
University of York
Received on Tue Jan 29 2002 - 20:10:54 GMT