19 May
2017
19 May
'17
3:44 p.m.
As for power, if you have a wife and/or kids, a PDP-11's power
consumption is not even above the noise floor in your
electric bill.
(Unless your trying to do it with RA disks!!)
bill
Out of curiosity how much power do these wee beasties consume?
___________________________________
The plate on the back of my 11/93 says 345 Watts. That's about a fifth what your
wifes hair dryer draws. Or slightly more than 3 100 watt light bulbs (which your
kids leave on all over the house all the time!!)
bill
I run a similar PDP-11/83 system 24/7 on a BA23 in a Pedestal stand. It has two 2MB memory
boards, an Emulex UC07 connected to two SCSI2SD Cards emulating two RD54s and two RA92s,
and a DELQA-T running RSX11M+, DECnet and Johnny Billquist;s TCP/IP and it draws 100-105
watts on my UPS.
I also run a Simh PDP-11 on a Raspberry Pi 3 as an adjacent node and it is much faster,
much quieter, but not quite as much fun.
Mark Matlock
19 May
19 May
4:18 p.m.
New subject: PDP Power Usage WAS: BBS software for the PDP 11
___________________________________
The plate on the back of my 11/93 says 345 Watts. That's about a fifth
what your wifes hair dryer draws. Or slightly more than 3 100 watt
light bulbs (which your kids leave on all over the house all the
time!!) bill
I run a similar PDP-11/83 system 24/7 on a BA23 in a Pedestal stand. It
has two 2MB memory boards, an Emulex UC07 connected to two SCSI2SD
Cards emulating two RD54s and two RA92s, and a DELQA-T running RSX11M+,
DECnet and Johnny Billquist;s TCP/IP and it draws 100-105 watts on my
UPS.
Doesn't seem that bad, I am sure some of my vintage servers w/ the 10-12 FH
SCSI drives, "tons of RAM, and four PPro chips are pulling somewhere along
those numbers. I may have to invest in a Kill-a-Watt type device to see for
sure though.
-Ali
22 May
22 May
8:23 a.m.
New subject: PDP Power Usage WAS: BBS software for the PDP 11
On Fri, May 19, 2017 at 5:18 PM, Ali via cctalk <cctalk at classiccmp.org>
wrote:
My PDP-8A with 32k core, RX01 Floppy and an extra serial port card pulls
345 watts.
It would be another 100 if I had not replaced the factory fans with modern
lower
airflow units. If left on 24/7 this would increase the average power bill
in the US by
about 30 dollars a month.
If you want to run a modern version of a BBS and not have it add
significantly to your
power bill then run it on a modern laptop. These can pull around 50 watts
when awake
and this would add only a little over $4 to the average power bill in the
US.
For even less power would be to use an Arduino (probably a Due) because
then you are
talking less than 4 watts. This would be about 35 cents per month.
I wouldn't want to run my Straight 8 24x7.and pay the power bill.
--
Doug Ingraham
PDP-8 SN 1175
___________________________________
The plate on the back of my 11/93 says 345 Watts. That's about a fifth
what your wifes hair dryer draws. Or slightly more than 3 100 watt
light bulbs (which your kids leave on all over the house all the
time!!) bill
I run a similar PDP-11/83 system 24/7 on a BA23 in a Pedestal stand. It
has two 2MB memory boards, an Emulex UC07 connected to two SCSI2SD
Cards emulating two RD54s and two RA92s, and a DELQA-T running RSX11M+,
DECnet and Johnny Billquist;s TCP/IP and it draws 100-105 watts on my
UPS.
Doesn't seem that bad, I am sure some of my vintage servers w/ the 10-12 FH
SCSI drives, "tons of RAM, and four PPro chips are pulling somewhere along
those numbers. I may have to invest in a Kill-a-Watt type device to see for
sure though.
-Ali
9:15 a.m.
New subject: PDP Power Usage WAS: BBS software for the PDP 11
On 05/22/2017 10:23 AM, Doug Ingraham via cctalk wrote:
For even less power would be to use an Arduino
(probably a
Due) because then you are talking less than 4 watts. This
would be about 35 cents per month. I wouldn't want to run
my Straight 8 24x7.and pay the power bill.
Or, a Beagle Bone Black, also about 3-5
W depending on CPU
load, but has a 1 GHz 32-bit RISC processor.
Definitely slower than a top of the line desktop, but
certainly usable.
Jon
2816
days inactive
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cctalk＠ibm51xx.net -
dpi＠dustyoldcomputers.com -
elson＠pico-systems.com -
mark＠matlockfamily.com