29 Jan
2002
29 Jan
'02
12:22 a.m.
--- Pete Turnbull <pete(a)dunnington.u-net.com> wrote:
Nice tip. Thanks. I'll look for them there.
-ethan
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At 05:53 AM 1/28/02 -0800, Ethan wrote:
If I had to guess, I'd go with the 1/4" diameter. These are larger
than PDP-8/L or RL01/RL02 bulbs.
I'm restoring some pre-TTL DEC stuff (R and W
series logic) and I need
a handful of front panel bulbs.
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 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.
I have checked
the online manuals I could find, but no mention is made
of the nature of the bulbs for 1966/1967-era DEC equipment. Any ideas?
Take a look at Farnell's online catalogue...