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Unitra Diora "Beskid" DMP-411 - interior, photo gallery, diagram

p.kaczmarek2  Cool? (+7)
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I would like to invite you to a short photo gallery and documentation of another radio receiver from my collection - a mono Beskid from the Unitra Diora stable, also known as DMP-411. This receiver was produced in the 1970s-80s and allows to receive radio waves in the long (165-285 kHz), medium (525-1605 kHz), short (5.96-9.8) MHz and UKF OIRT (65.5-73.5 MHz) ranges. It also allows connection of a DIN input (e.g. from a tape recorder). It is powered from the mains, still 220V/50Hz, power consumption approximately 10W.

Unitra Diora Beskid from outside .
The front panel is made of black plastic, the case is made of plywood:
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On the front panel, we see the main switch and four isostat switches for changing the ranges (U, D, S, K). There is also a 'hidden' function there - pressing U and D simultaneously activates the DIN (tape) input. In addition to this, there are two sliders (in my case without 'heads') for adjusting the strength and timbre of the sound.
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The fibreboard is removable at the back.
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On the rear panel there is an aerial output and a DIN-type turntable/magnetophone output. This output is activated by pressing the D and S range selector keys simultaneously.
The radio is a box just under 14cm high, 18cm deep and 52cm wide.

Unitra Diora Beskid inside .
The back plate is removed by loosening three screws:
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Inside you'll notice a ferrite antenna, an incandescent light bulb (backlighting), a 50Hz mains transformer (it's not those days that switching power supplies were popular) and a single TONSIL GD10-16/5/2 5W 4Ohm speaker.
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To get further, loosen the screws holding the catches in the housing groove:
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PCB freed from its hooks, which need to be loosened from the underside of the case:
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Extending the front end from the PCB, you can see the adjustable capacitor used for tuning by changing the capacitance:
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In the photos I have tried to capture the characteristic components of the time well, here for example you can see the isostat switches, filters, coils (also those with an air core) and even the BF195 and BF194 transistors in those characteristic housings of theirs. You can also see the tuning mechanics with the string.
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There's quite a bit of dirt around the front, but I shouldn't complain anyway, it's the best preserved electro-junk receiver I've come across so far.
Volume and tone potentiometers:

Unitra Zatra TS 6/10 mains transformer:
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Finally the integrated circuits - the radio is realised on UL1211 and UL1402.
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What is the UL1211? Below you have it in Polish:
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And about the UL1402:
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Whole PCB:
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From the underside I did not take a photo, but it is rather clear that it is single-sided and the assembly is through-hole (THT).
Finally, the schematic. The schematic has already appeared on our forum several times, but for the sake of convenience I will post it here anyway:
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According to the information I found the schematic fits related receivers: Silesian DMP-401, Beskid DMP-411 and Giewont DMP-413.


Summary .
This radio is older than I am and in my childhood I was not likely to encounter such wonders any more, but I still liked it very much, especially as it is one of the better preserved copies that came into my hands.
Some time ago I posted a similar topic on the forum about UNITRA Snowball R-207 and if another similar receiver falls into my hands, I will be happy to document it too.
And what radios do you guys have in your collections? The first 5 posts by different users with a photo with a card with an Elektroda nickname and Unitra equipment in the background will get 200 Elektroda points from me.

About Author
p.kaczmarek2
p.kaczmarek2 wrote 12386 posts with rating 10261 , helped 584 times. Been with us since 2014 year.

Comments

Grzegorz740 15 Oct 2022 11:41

My Taraban radio 3. https://obrazki.elektroda.pl/1616724000_1665826889_thumb.jpg . [Read more]

ArturAVS 15 Oct 2022 12:39

radio. Such a piece of equipment "rammed" into me over a quarter of a century ago, acquired (new from a shop for MM) and after about a month was converted to stereo working with the also converted MK... [Read more]

pipałosia 15 Oct 2022 14:51

I wish I was at home, I also have some equipment from those years. [Read more]

actron 15 Oct 2022 20:48

And here you go, Taraban in the process of being renewed :) https://obrazki.elektroda.pl/9577541400_1665859653_thumb.jpg https://obrazki.elektroda.pl/9068345900_1665859665_thumb.jpg . [Read more]

pawelr98 16 Oct 2022 03:01

I own a DSP-301 with identical head and p.cz circuitry. 1:1 the same head (minus Arcz), the same UL1211 and the p.cz circuit is absolutely no different either. Even the demodulator has the same parts. Standard... [Read more]

bsw 16 Oct 2022 20:27

https://obrazki.elektroda.pl/6637835200_1665944719_bigthumb.jpg . My Taraban has been in the kitchen on the fridge for over 20 years and plays for up to a few hours every day. Super radio ! [Read more]

Pan.Kropa 17 Oct 2022 11:42

These are some of my radios I plan to look after in retirement. https://obrazki.elektroda.pl/6853058000_1665999707_thumb.jpg . [Read more]

szeryf3 17 Oct 2022 14:27

@p.kaczmarek2 I see you've had great luck with interesting electrical junk lately. Interesting description of the subject. @Mr.Kropa in the photo I think I see a ,,Jowite 2". I own an older model... [Read more]

Pan.Kropa 17 Oct 2022 14:41

Yes, that's a Jowite 2, or more precisely a 2 IC. In the 1980s the object of my sighs. [Read more]

Jogesh 17 Oct 2022 15:50

We used to listen to broadcasts from India on Jovita in the 1990s. But it went better on the Aga receiver. You could listen to All India Radio. And you probably still can. I think when I come to PL I'll... [Read more]

Olkus 18 Oct 2022 07:03

At my place is the Anna R612: https://obrazki.elektroda.pl/6718358400_1666069348_thumb.jpg . I also have an Amateur 3 Stereo and ZG15C speakers. Both radios need tuning, maybe one day they will... [Read more]

sq3evp 18 Oct 2022 08:33

I used to have one such Anna, I tuned it myself (it took about a month of constant tweaking and tuning) but it was lost in the mists of time somewhere. It can be tuned very well just needs work. The... [Read more]

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