saipan59's latest activity

Just discovered that bitsavers has a KDB50 microcode listing: http://www.bitsavers.org/pdf/dec/vax/vaxbi/ The first page shows that it...

Yes, you're right. It is certainly possible. And the easier comparison is the UDA50 (M7161), rather than the KDB50. The microcode word...

Yes, Qbus. It's a 2-board set -- the M7164 has the Qbus signals; the M7165 only gets power from the bus. Yes, there is one set of ROMs...

In case anyone is interested, the Museum has put this CVC on eBay. Pickup only in Colorado Springs. The sale benefits a worthwhile...

"Drawbacks of CVTs are their larger size, audible humming sound, and the high heat generation caused by saturation."...

If the transformer has loose laminations, it may be drawing more input current than normal even with no load. I don't know exactly what...

I'm checking out this H7225 "constant voltage conditioner" which belongs to the museum I volunteer at. Does anyone have experience with...

[EDIT: 11/24, not 11/04] Isn't an 11/24 the simplest Unibus PDP? One hex module for CPU, another for memory. As I recall, the BP is a...

The disk controller board you have is half of a UDA50: https://gunkies.org/wiki/UDA50_Disk_Controller A UDA50 is probably "essential"...

I had a VT103 that I bought in the 80's via the 'Employee Purchase Program'. It cost me over $4K. I still have the Q-bus backplane from...

Hi, If this is what you need, PM me a mailing address, and I'll send it to you. It's apparently 'NOS'. You might as well take the entire...

Hi Lee, Can you post a picture of the type you want? My "fuse holder box" might easily have what you need, but I'm unclear which...