On Fri, May 19, 2017 at 5:18 PM, Ali via cctalk <cctalk@classiccmp.org> wrote:
> > ___________________________________ > > 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 > 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
