Search:

Thanks, exactly what i was looking for.

I am doing some work on a weird military display that uses a small daughter board that’s centered around a 8086 processor chip. The board just has the 8086, clock, couple ROM and some interface on...

Man, I just looked at the schematic of the VT-100 power supply and have to say that has got to be one of the difficult to work on and overcomplicated power supplies I have seen. An I have worked on...

Was looking at an Amrel RT586 Military Laptop, I need something that I can take and use in my M-151 military mutt with the radios for running teletype. Have been using a Dell running XP but want...

First rule of all electronic troubleshooting, did you check the power supply? not the one that goes in the pod but the big black section behind the drives? I would confirm that the 5 VDC and 12 VDC...

A lot of the early digital military teletype stuff had that as a annoying habit, they will buffer the entire line until they see a CR/LF and then print it. The UGC-74 printers do this and always...

Gave using a computer a lot of thought but ran into a couple issues, first would have to have a system with at least two communications ports because of the different speeds. Second was the thing...

A project that I spent several months on from concept, design to completion. The goal was to find a way to use an obsolete messaging terminal from a Tactical Satellite communications system for Ham...

I have a 1755 as part of the collection but don’t consider that a real system, same color scheme but not much else. Think when we consider the significant systems you are talking about the compass,...

The Data General NOVA and Rolm stuff is the new drug of choice right now, that’s why I am considering selling off the DEC collection to make more room.

Whats with the RK family of drives? they have to live in plastic bags when not in use? glad to see that the RL family don't have that issue. must result in a strange thing when racking them up on a...

Just curious, are those neon lights or incandescent? If incandescent wonder what voltage? If they were neon or some other gas discharge can see whipping up something using 74141 or the like for the...

Do you get the Boot prompt when you manually start the system?
Would not worry about the -15 volt bus too much, you can have a lot of variance and it will still work.

couple simple test but be very careful, that system uses a DC to DC converter power supply with the input side being at line potential and if you are not experienced
with working on high voltage...

Figure every six months or once a year I will beat the drum about selling off the DEC collection. Not that I am thru with vintage computers but not getting any younger and would consider selling off...

My system is using the 9301 Bootstrap/Terminator card and you have a 9312 card for yours, it almost looks to me that your 9312 is set to the wrong range of addresses and is coming up in a diagnostics...

video of my 34 with RL drives, Think you want your system drive to have a "0" cap being that's the default.

https://www.youtube.com/watch?v=sK99WuaU_k8

RF

Be careful! If not you will end up with a fan controller that has more processing power then the PDP-11, Always saw that as the flaw in using a modern Windows system running a GUI as opposed to using...

The DC power pod in the back of the computer provides 12 volts DC for the computer. By pushing the button under the pod it will pop out and you can put the battery in the same space.
Pop the power...

Latest Rolm video, this is testing a head for a computer that’s getting sent out.

https://www.youtube.com/watch?v=tHX62bVPkRY

Have a source for the hardware so if anyone wants a system let me...

Windows 10 sucks, my limited understanding is that unless you are running sixty-four-bit software it wont work. The more paranoid part of my personality sees this all as a plot to kill off all the...

Don’t have an eight myself but have a couple elevens, have run the elevens with the GUI on Windows systems and did not like it one bit. Have run the systems with more modern VAX terminals like...

The system in the video is a AN/UYK-19 1602B that was built in the early nineties by Loral under license.
I have an older 1602 that’s from the late seventies but that thing you have looks like maybe...

In a shameless effort to promote my latest video thought I would put a link up for it here:

https://www.youtube.com/watch?v=SMH4bGbC77w

Its of my Rolm 1602 that’s a military version of the Data...

I can provide a picture, no idea what you measure?