In search of VAX 750 front door and CPU spares.

-----Oorspronkelijk bericht----- From: Ian Finder Sent: Sunday, April 17, 2016 1:23 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: In search of VAX 750 front door and CPU spares. Please let me know if you know of any. Picked up a 750 today, and will be making a trip to Calgary in a few months for another... --------- I also have a not complete VAX-11/750. I am looking for the rear cover. Given its size, probably expensive to ship even within the EU, but if somebody has that rear cover, I'd love to hear! My VAX-11/750 *was* working ... I powered it up regularly, but as the temperature in my "Hall of Famous Iron" is just 10 degrees Celsius, I figured that grease of bearings in the disk drives are not that viscous. So I am waiting for warmer times. Anyway, a fortnight ago, I had read in the installation manual that a certain revision level is required for the FP option (slot 1). I have that FP board, but I never installed it, because it is a "little oven", so much heat is generated by this board. The manual also said how to see the revision level, so I turned on the VAX and entered the command (E/I 3E, IIRC). My vax is of a higher revision level so that was good. But I smelled something "funny" ... Looking at the back side I saw dense smoke coming out of the power controller! Quickly switched of the machine, and returned to the back. The smoke came out the opening where the mains cable goes in. The smell gave me the impression it was like slow-burning cigarette paper, not the typical smell of a over-heated resistor. I have good hopes that the H74** PSUs are fine, and that capacitors in the mains filter died. But that remains to be seen. A quick look how to remove the power controller was not obvious, so I have to grab the documentation. Need it anyway. The accompanying RA81 (with on it the VAX diagnostics) did not start up correctly, but that was a simple head lock issue ... After some years I even had forgotten how to open the RA81! But that RA81 now starts up fine and lights the READY indicator. I updated the RA81 web page a bit. Two steps forward, one step back ... - Henk