PDP 11/40 Industrial 11 model

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PDP 11/40 Industrial 11 model	by Bill Degnan - 04/06/2015 21:52
Digital made a PDP 11/40 "industrial11" model. The front panel coloring is different but otherwise operates the same as the standard unit. Pictured here is a view of the bottom card cage with the main CPU and memory module. Click image for larger view. The top expansion chassis of the industrial 11 is also chock full of cards including more memory. Click image for larger view. More photos Reply
Card Inventory	by Bill Degnan - 08/22/2015 21:11
Cards Removed from system before transport and cataloged below exactly "as was". I noticed that the expansion backplane cable was disconnected from the main CPU, not sure why. I marked all cables as to what card they came out of and what slot. This system has 6 16K Core RAM modules (MJ11) = 96K BOTTOM CABINET: Starting from slot 1 (closest to the front panel) 1: empty 2: M7253 3: M7232 (1-4) M7237(5)M787 (6) 4: M7231 5: M7233 6: M7235 7: M7234 8: M7236 9: M7800 (3-6) 9/11: M981 (1-2) 11: M8293 (3-6) 12: M7259 (1-2) 13: G114 14: H217C 15: G235 16: G235 17: H217C 18: G114 19: M9283 (3-6) 19/21: M9202 (1-2) 21: M8293 (3-6) 22: M7259 (1-2) 23: G114 24: H217C 25: G235 26: G235 27: H217C 28: G114 29 M8293 (3-6) 29/31: M9202 31: GC (D) 32: M7809 33: M9300 YB (1-2) 33: GC (4) 34: M9300 (1-2) 34: M7800 (3-6) TOP / EXPANSION CABINET 1: M8293 (3-6) 2: M7259 (1-2) 3: G114 4: H217B 5: G235 6: G235 7: H217C 8: G114 9: M8293 (3-6) 9/11: M9202 (1-2) 11: M7297 (3-4) 11: 7296 (5-6) 12: M7295 13: M7294 14: M5904 (3-4) 15: M5904 (3-4) 16: M5904 (3-4) 17: GC (4) 18: GC (4) 18: M9300 (1-2) 19/21: M9202 (1-2) 19: GC (4) 21: M7248 (3) M7212 (4) M7212(5)M7212 (6) 22: M784 (5) M783 (6) 23: M7213 (3-4) M785 (5) M785 (6) 24: EXPANSION CABLE (1-2) 24: "small card" (4), M785 (5) M785(6) 26: M9700 (3), M105 (4), M7226 (5-6) 27: M7821 (4) 28: M117 (4) 29: M002 (4) 31: CABLE FROM 24 31: M7258 (3-6) 32: M8094 33: M8098 34: M7800 YA (3-6) 31: - 32: - 33: - Whew! Reply
Front Panel Repairs	by Bill Degnan - 12/22/2016 07:52
Pictured is the front panel with the cover removed. I spent a few hours cleaning before I got to this point, the entire system is pretty rough. Click image for larger view. This photo shows the 4 lights that do not function. Technically this is a camera trick, but for illustrative purposes, work with me. Click image for larger view. I removed the dead bulbs and replaced them with bulbs from a donor front panel, that was used in a DEC system but not branded "Digital". Pictured are a few LED cathode/anode pins, poking through the back of the front panel board. Click image for larger view. The lights from the donor panel have a slightly different resistance and they shine less than the originals. The panel traces are kind of brittle and I decided to leave them as is rather than remove and put in something else. The picture exaggerates the difference, live it's not so bad in normal light, one would not notice during use. Click image for larger view. Here is a picture of the front panel plates from the regular 11/40 and the industrial 11. The Rear Click image for larger view. So far I have tested the CPU cards and amazingly they all work in a basic way at least using the front panel. I spent a lot of time cleaning the front panel, making good progress. Click for more photos Reply