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I did get some tapes for the Iriwin drive and attempted to repair 4 of them with the plastibands, and while I’m quite confident I got the bands on...

If you want to try using a 3.5" Floppy Drive to emulate an 8" Floppy, Marcus Bennett has that information available. While his site is down...

The principle he's using is based on "supercaps", a method used to power devices for generally short intervals (such as a brief power failure): ...

@wa2flq you mean measure A pin to B Pin like this ? http://www.retrocmp.com/how-tos/setup-a-pdp-11-unibus-backplane @qbus it your video :)...

Comparing a capacitor to a battery: A capacitor is a charge storage device, in a sense, similar to a battery however there is a very big...

About the 3 floppy drives? were in working order but the third gave a flashing red LED on the motherboard. I opened the drive and I saw tha 1 IC had...

Finally I found the error with the video signal. First I replaced all capacitors in the power supply and that already gave a big improvement. The...

Larry, Thanks, I'l go work on that Maurice

I'm very happy with the results I got :). I just allocated 32K inside a physical page and used 8 bit PCM (8192 and 11025 Hz). Sound quality is...

So you might be the first person to confirm the existence of this drive! You actually sold 251R models? Got any still new ones out back? haha

First thing is to add more memory, at least 512 MB and even more if possible. You may want to check that the system can handle more than 512 MB...

some cf cards do not work like the sandisk, in my case I had to take a 2GB transcend on my ibm 5155, and it worked, I had the same problems as you,...

Using gold caps as a replacement isn't a new idea. Good thing is, since they are caps, there's no need to disable the charging circuit. Bad thing is,...

http://bitsavers.org/pdf/cdc/cyber/cyber_200 I have a lot more from a house cleanout a friend of mine did in San Jose I'm trying to decide if I...

Cool, didn't realize you were involved with the STAR. Yes, that's possible, or it might be a relatively dumb peripheral processor console. I'll ask...

Got the XT-CF installed in my Compaq Portable and it ain't working. It sees the card and formats, but upon formatting completion, it shows an error...

That is late Turbo/Borland Pascal. It's not finding IMAIN.TPU because IMAIN.PAS has not been compiled yet. It's been a long time, so I can't...

Is the groove in the leadscrew spotless? Does the needle follower fit securely in the groove, or has part of it worn or broken off? Some drives...

This will make a few people very happy! Overnight I had a thought that perhaps I did not simply download the 1000A Service Manual from somewhere...