Last night I managed to delaminate existing FFC by using the same contact cleaner that was used to "fix" the power button. Then capton tape was used to keep the existing copper traces aligned.
As next, I'll try attaching small strips of copper tape to lengthen the existing traces...
#vintagecomputing #repairs #elektronika #mk52

While earching for correct pre-existing FFC from random websites is not really that fun, I decided to do something else..

This is a new plastic retainer part which should eventually help against the cable fatigue.

Model here: https://www.printables.com/model/1512008-elektronika-mk52-flexible-flat-cable-restrainer-re

#freecad #mk52 #vintagecomputing #3dprinting

Pitch, please!?
Excuse me?
For the new flexible flat cable (FFC)...

#vintagecomputing #mk52 #elektronika #madeinukraine #electronics #repair

When comparing two boards, one can spot that the upper board (I have circled the area as well) is missing the plastic strain relief for the board-to-board flexible flat cable.
Lack of strain relief allowed micro-cracks to form, add some moisture and we'll eventually end up with a delaminated flexible flat cable and broken solder joints.

#vintagecomputing #madeinukraine #elektronika #mk52

And picture from insides. Top one was not powering on and eventually figured out that the issue was broken power switch. After flooding it multiple times with contact cleaner I was greeted with working display!
But.. during the unit disassembly, disaster struck...
#vintagecomputing #elektronika #mk52 #madeinukraine
I now have two of them. Still missing the other 50 shades of grey.
#vintagecomputing #elektronika #mk52 #ukraine

Soviet Scientific Calculator Gives Up Its Cold War-Era Secrets

Say what you want about Soviet technology, but you've got to admit there was a certain style to Cold War-era electronics. Things were perhaps not as streamlined and sleek as their Western equivalents, but then again, just look at the Nixie tube craze to see where collectors and enthusiasts stand on that comparison.

One particularly interesting artifact from the later part of that era was the lovely Elektronika MK-52 "microcalculator". [Paul Hoets] has done a careful but thorough teardown of a fine example of this late-80s machine. The programmable calculator was obviously geared toward scientific and engineering users, but [Paul] relates how later versions of it were also used by the financial community to root out banking fraud and even had built-in cryptographic functions, which made encrypting text easy.

The video below the break shows the teardown, detailing the mostly through-hole construction and the interesting use of a daughter-board, which appears to hold the high-voltage section needed to drive the 11-character VFD tube. The calculator appears to be very well cared for, and once reassembled looks like it would be up for another ride on a Soyuz, where once it served as a backup for landing calculations.

We love the look of this machine and appreciate [Paul]'s teardown and analysis. But you say that the Cyrillic keyboard has you stumped and you need a bilingual version of the MK-52? That's not a problem.

#retrocomputing #calculator #mk52 #programmable #rpn #russia #soviet

Soviet Scientific Calculator Gives Up Its Cold War-Era Secrets

Say what you want about Soviet technology, but you’ve got to admit there was a certain style to Cold War-era electronics. Things were perhaps not as streamlined and sleek as their Western equ…

Hackaday