Alegend's latest activity

I have a similar device which is labelled a "power conditioner". It emits such a loud hum it makes you want to get up and move to...

I recently acquired a KDJ11-DB board which appears to be from 1991, based on the date codes on the chips. Put it together with an...

You should be able to get a decent measurement and visuals even from a cheap-o-scope. Make sure you are using a 1:10 probe and that it...

The cooling fans on my Micro PDP11/23 were wearing out - the bearings in one were failing and the fan would no longer spin, and the...

The power supply rail should be checked for sanity but has nothing to do with these spikes, as they are transient spikes generated...

Digital ICs draw excessive current when switching, not when sitting at a sepecific logic level 1 or 0. The static fan-out load is a...

Sorry about the link, here's the correct one: https://microvax2.org/wp/2023/05/03/microvax-i-vax-vms-4-7-successful-bootstrap/ There is...

If you are familiar with simh you can use it to generate a standalone backup kit from within an emulated VMS system, on emulated RX33...

Hello All, I've noticed that there any number of VT10x monitors for sale on Ebay, but without the standard VT100 keyboard to go with...

Yes you must install a pull-up resistor for both the ready and write protect pins, so your drive is recognized and writeable. Any value...

I had no problems using floppy images created by OpenSIMH. No conversions necessary, OpenSIMH is your friend for going most of the way...

Take a look here: https://microvax2.org/wp/2023/05/03/microvax-i-vax-vms-4-7-successful-bootstrap/ I have achieved what you're trying...