deskthority

Dont think I need to go to the resistor route it seems. Replaced 2 (new) capacitors, C3 and 4, at the recommendation from someone on some Russian forum dealing with soviet machines. From the the 0.033uf (if I recall correctly) that was originally also in the board with 0.068uf caps. Now it works qui...

Then it might be time to find out how NKRO matrices work. Might be good to know that this computer was superseded by a the БК-0011M, which was a slightly modified version of this computer. That released seemingly half a year later. The differences being a pin for sound out on the back (instead of ju...

It's connected by 2 16 pin DIP sockets, which then sends the data through a resistor array and then into the K1801VP1-014. The 1 key limit might be a hardware restriction rather than a matrix issue as the system is based on and compatibility with the PDP11 from 1970. It also has ROM socket on the ot...

Recently got my hands on an old Soviet homecomputer, however it famously has just an AWFUL keyboard. The ПКН-111, being quite famous for getting stuck and registering the wrong keys (and only allowing 1 key to be pressed at the same time). I lubed the switches which did wonders to the keyfeel (from ...

Thanks, though for at least the switches I'm hoping to get them with the keycap or here in europe. Having seen American vendors, the shipping is rather expensive from the US to the Netherlands. I don't expect to get the keycap from any other place than Japan though. The chance of getting it from any...

Hello I'm looking for 2 or 3 blue or white SKCM Alps Switches and a Right spacebar (Henkan?) keycap for a PC8801 type A board. I'm repairing a board I got, I got the PC working like a dream and the keyboard to, except for 2 switches that were beyond repair and I was missing the right spacebar which ...

Thanks for the tips! The board before disassembly: https://imgur.com/a/MJnXRSo Had taken the picture for future reference. Right now 2 boxes of switches, keys and separate plate, pcb, wire and housing. As I suspected that there was some PCB issue and with loads of bridges and no good ability to chec...

I'm coming from the retro-PC hobby and recently got myself a broken PC8801FH, got the computer working like new and works great with a PS2 toPC88 converter I build, but they keyboard that came with it is still not in a working state. Roughly 1/3rd of all switches didn't work and some sometimes regis...