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Электроника МК-52 offers on TAS - Printable Version

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Электроника МК-52 offers on TAS - Thomas Radtke - 11-30-2017 01:28 PM

FWIW: Lately, some of those amazing Elektronika MK-52 appeared on TAS at really good prices. I had one several years ago but its EPROM was already dead. No longer a collector, I'm not interested anymore but thought some of you are.


RE: Электроника МК-52 offers on TAS - Michael de Estrada - 11-30-2017 06:38 PM

(11-30-2017 01:28 PM)Thomas Radtke Wrote:  FWIW: Lately, some of those amazing Elektronika MK-52 appeared on TAS at really good prices. I had one several years ago but its EPROM was already dead. No longer a collector, I'm not interested anymore but thought some of you are.

I have an MK-52, but it is totally kaput. Finding them is not difficult, but finding one in good working condition is the problem. Do you have any of the accessory modules ?


RE: Электроника МК-52 offers on TAS - jebem - 12-01-2017 03:47 PM

I see these Soviet era machines as valuable items from the point of a collector's view.
I don't see them as a choice for regular utilization, though. The keyboard is terrible as the keys have almost no travel when pressed and can fail to register too.

One common reason to see these machines failing (not only this model) are the electrolytic capacitors. On every single specimen that i checked, at least one capacitor was defective. They either lose the capacitance or/and act as resistors to DC.

This issue is not exclusive of Ukrainian made calculators. I see this on every sort of equipment, no matter its origins. Electrolytic caps are like rechargeable batteries in the way they fade away with the passing time, even when not used.

The VFD is prone to fail as well, but the good news is that we can still buy new VFD spare parts on Ukrainian and Russian eBay sellers.


RE: Электроника МК-52 offers on TAS - Thomas Radtke - 12-02-2017 06:33 AM

(11-30-2017 06:38 PM)Michael de Estrada Wrote:  Do you have any of the accessory modules ?
No, and never had one of them.

@jebem, I don't know if those VFDs tend to fail; Mine (other calculators) all still work after decades. One of those sellers displays the VFDs of the respective calculators and they appear of equal brighness. Feedback is ok. And yes, the keys have a terrible feel, but at least mine surprisingly never had a problem concerning registering entries. But my only true complaint about the MK-52 is speed. It was the slowest calculator I ever had.


RE: Электроника МК-52 offers on TAS - jebem - 12-08-2017 08:53 AM

Halo, Thomas,

The keyboard can fail depending on how the calculator was stored or perhaps badly used.
I usually fix it by dismantling and cleaning the membranes and replacing the foam.

The VFD can present some defects, like not illuminating properly or just go dead.
I had to replace one that had the filaments broken inside.
Other members have posted here for defective VFD's and some took the time to reapir them! I just don't care about ir, as I prefer to replace it with a new unit, as least while I can find them in eBay:
http://www.hpmuseum.org/forum/thread-2009-post-52833.html#pid52833
http://www.hpmuseum.org/forum/thread-2345-post-27923.html#pid27923
http://www.hpmuseum.org/forum/thread-2345-post-48405.html#pid48405



These machines can be found on eBay "as new", despite the more or less damaged boxes they come in.
In fact some of them were never used, they just didn't sell them and they were stored for some years until Ukraine and Russia people discovered eBay...

Despite the looks and used technology, these MK 52 and 61 are not that vintage, despite they are a MUST in any calculator collector IMHO.
I enjoy that vintage looks of the VFD displays, but it is me, I'm a tube/valve/Elektronenröhren pearson.