| Tape Format | 1 inch 8-level 10 characters per inch |
| Reader Speed | 300 characters per second (30 inches per second) |
| Reader type | Optical |
| Reader tape requirements | Unoiled fan-folded, 12% optical transmittance max |
| Punch Speed | 50 characters per second |
| Punch type | Mechanical |
| Punch tape requirements | Unoiled or oiled fan-folded |
| Environmental | 55 to 110 F, 20-95% humidity |
| Weight | 40 lbs |
| Size | 10.5x19x15 (HxWxD) inches |
| Cost | Punch and controller $3900 and $320 installation from DEC in 1974 $37 per month for maintenance |
Documents related to PC04 and PC8E
These pictures color are a little off, I tried a different film which didn't work well. The red looking handles on the boards are the M series Maroon
modules. Since PC monitors aren't noted for good color calibration what you see may not be what I see either.
The following picture links also have descriptions of what is shown in the pictures.
Current size small. Select picture size for links below Small Medium Large
Front of unit ( 42K)
Back of unit ( 38K)
Punch side of unit ( 47K)
Following are with covers removed
Front of unit ( 28K)
Punch side ( 55K)
Top view ( 70K)
Cardcage closeup ( 53K)
Backplane side ( 56K)
Front side of boards ( 51K)
Back size of boards ( 59K)
Paper tapes ( 61K)
Following are a repair I made June 23 2012
M044 Crispy resistor ( 48K)
M044 back ( 54K)
Videos of operation of PC04. How to view The large realvideo files are the best but slow to download. The large MPEG has some artifacts from being recorded with interlaced video from a camcorder and is larger than the realvideo.
Reading PDP-8 Editor binary tape.
Realvideo:
large (397K)
small ( 40K)
MPEG:
MPEG not available yet.
Punching PDP-8 Binary loader.
Realvideo:
large (795K)
small ( 80K)
View of punch mechanism feeding tape.
Realvideo:
large (200K)
small ( 21K)
Feel free to contact me, David Gesswein djg@pdp8online.com with any questions, comments on the web site, or if you have related equipment, documentation, software etc. you are willing to part with. I am interested in anything PDP-8 related, computers, peripherals used with them, DEC or third party, or documentation.
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