Recent content by NF6X

Derp! I meant to refer to the computer, but had a brain fart.

Cat not included. https://www.ebay.com/itm/157119287805 https://www.ebay.com/itm/157119299418 https://www.ebay.com/itm/157119301895 https://www.ebay.com/itm/157119300992 Edit: For me at least, eBay's flow rate limiter keeps the 2nd-4th links from rendering thumbnails. It's a NIB DECwriter III...

Is there a datasheet anywhere for the DEC part number 1612463 150ns delay line? I would like to understand the clock generation in my PDP-11/34A better. It appears to also be used in the PDP-11/44, VAX-11/780, etc., and it appears to also be known by national stock number 5999-01-084-6859.

https://www.ebay.com/itm/256979966410

https://www.ebay.com/itm/297417431748

I have no progress to report on the tape interface. I did overhaul the power supply and get it working properly, and then got distracted by another squirrel. The next step will be to start probing the Omnibus to debug the CPU and panel. At this moment, the squirrels distracting me are a 50/50...

Are those media specs available anywhere? I do not recall stumbling over them so far.

What is possibly dumb about it?

I seem to recall the interface pinout between my IDC730 interface card and R80 drive looking similar (maybe identical?) to the SMD drive pinout. Does anybody here know if it is compatible with SMD drives and/or emulators?

Now I’m tempted to make a nice R80 emulator and never collapse my real drive’s wave function.

The R80 in my VAX-11/730 hasn’t given me trouble yet. Granted, it’s been several years since I turned the system on… :p

Well, it’s a lovely system, anyway. I hope to have a PDP or VAX in a BA23 deskside box one day.

Maybe we can get a staff discount?

https://www.ebay.com/itm/335883110183 Out of my price range, but it looks like a very nice system.

Do you think somebody might buy it at a large fraction of that price? I don’t know how rare and desirable the 11/55 is.