12 Jan
2008
12 Jan
'08
11:51 p.m.
Hi, all,
I've been collecting various classic bits to work on over the winter,
including a pre-CTRC 32K PET board (2001-N/3032) and a Static PET
board. I don't have any cases or accessories, but I do have a C2N232,
a single bare keyboard, and a C=Key converter enroute. For video, I
was planning on trying that ancient XOR circuit to make composite video
from sync and video, and feed that to an old Panasonic
mono CRT I saved
from scrap. What I'm lacking at this point is a power supply.
Obviously, I'm unlikely to find a suitable mains transformer, so I was
going to cobble up some form of switcher that puts out enough of the
right voltages to make this all work. Poring over the schematics for
the 2001-N board on zimmers.net (e.g. 320349-9.gif), I'm guessing that
the onboard regulator circuit is pumping out +5VDC at over 5A, +12VDC
at a couple of amps, and a miniscule amount of -5VDC. I'm not running
a real tape drive, so I'm not as worried about the +9VDC unreg.
Does anyone have any reasonable estimates or real-world measurements
for the current draw on the various supply lines? Has anyone out there
ever gotten a PET to run from externally regulated DC?
Thanks,
-ethan
--
Ethan Dicks, A-333-S Current South Pole Weather at 12-Jan-2008 at 23:30 Z
South Pole Station
PSC 468 Box 400 Temp -13.9 F (-25.5 C) Windchill -32.7 F (-36.0 C)
APO AP 96598 Wind 8.3 kts Grid 23 Barometer 686.2 mb (10395 ft)
Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html