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Interior of an old Polish radio receiver Ania R612 made by Unitra

p.kaczmarek2 11814 52
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #31 18765954
    Jacekser
    Level 26  
    sq3evp wrote:
    ...After a few years I reached out to RM 121 and also managed to improve its performance. Now there are plenty of tutorials on the web, but when it was trial and error without documentation. Analogue technology from the communist era will be useless in a while - DAB may take over the airwaves and only memories will remain.
    .
    They are still making chips as, say, "modern analogue radios":
    https://www.silabs.com/documents/public/user-guides/Si4836DEMO.pdf
    Interesting- they differentiate the AM band as :
    AM-long,medium :~500-1750KHz(or rather only medium);
    SW-short:~2-22MHz.
    Si4834/35 has LW,i.e. long band.(but they are already in not very interesting QFN cases and already in digital support).
    https://www.silabs.com/documents/public/data-sheets/Si4730-31-34-35-D60.pdf
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  • #32 18765993
    ^ToM^
    Level 42  
    Olkus wrote:
    And when I looked a few years ago there was nothing.


    There was, there was because they had been producing the ZN414 since 1972.:)
  • #33 18768359
    szeryf3
    Level 29  
    A nice description you have done. I'll wait to see how you run to the end.
    I have run for myself and am using a Slinky, a 1990s Stern radio. In the process of playing are two U2 Pioneers and a Jovita.1.
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  • #34 18772623
    DJ_Opornik
    Level 21  
    ^ToM^ wrote:
    .
    "Das „Stereo-Radio 30“ wurde Ende der Achtziger als Gemeinschaftsentwicklung der DDR mit Polen vom Hersteller „Unitra-Eltra“ im polnischen Bydgoszcz (dt.: Reichenbach) produziert und über Stern Radio Berlin in der DDR vertrieben."

    Which should be understood as:
    "Stereo Radio 30” was produced in the late 1980s as a joint project between the GDR and Poland, by the manufacturer „Unitra-Eltra” in Bydgoszcz (dt: Reichenbach) in Poland and distributed in the GDR by Stern Radio Berlin."
    ........
    .


    History repeats itself, Reichenbach is Dzierżoniów and Bydgoszcz is Bromberg. From your post it appears that this is a mistake not yours, and already in the source. Nevertheless, it is worth being aware that you are quoting errors.
  • #35 18774686
    James596
    Level 28  
    Whatever, but one thing has to be openly acknowledged. These receivers were stylistically very pleasing to the eye. For the period in which they were produced, they didn't look clunky and didn't stand out from what was available abroad at the time. By the way, it's interesting how many products from behind the Iron Curtain were sold as cheap models under the logos of some large companies or brands created specifically for market needs. Of Polish receivers, I quite fondly remember the "Manuela 3" model, also sold in Germany as RFT. For a "dachshund" type equipment, it had a very dynamic sound, definitely better than even the much praised RMS-404.
  • #36 18775284
    ml
    Level 30  
    Manuela was also sold in the west as the Royal TR1000
    https://archiwum.allegro.pl/oferta/unitra-eltra-radio-manuela-2-royal-tr1000-i7142176669.html.
    Other equipment was also sold in the West under the brand names Quelle, Universum, HGS, ITT etc., e.g. Ania, Lena, Zosia, Alicja, Bogna. Of course, we are talking about portable equipment because elements of tower sets from Diora, ZRK, Fonica were sold there earlier in substantial quantities.
  • #37 18775434
    ^ToM^
    Level 42  
    DJ_Opornik wrote:
    .
    History repeats itself, Reichenbach is Dzierżoniów and Bydgoszcz is Bromberg. From your post it seems that this is a mistake not yours, and already in the source. Nevertheless, it is worth being aware that you are quoting errors.


    This is a secondary issue. The point was that it was a domestic production.
  • #38 18787403
    Anonymous
    Level 1  
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  • #39 18787735
    ojciec
    Level 34  
    Anne 2 and Anne 3 in a different housing with Anne R612/613 have nothing in common.

    These are modern receiver modules on CXA1119 inserted into the housing after Ania R612/613

    Same thing:
    Lena 1/2 a Lena 3
    Tola a Tola 3
  • #40 18787747
    398216 Usunięty
    Level 43  
    Winylov wrote:
    Maybe tuning the above, will go much easier
    And what do you want to tune in it since it already has the current UKF range?
  • #41 18787816
    Anonymous
    Level 1  
  • #42 18801092
    piotrek0207
    Level 20  
    Jacekser wrote:
    And just out of curiosity-what are the smallest AM-FM radios you know of (in terms of the number of components used necessary to make them work)?
    (TDA7000 and similar.)
    .

    TA2111N
    CXA1691
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  • #45 19162465
    partyzancik
    Level 23  
    Hello, I have bought a radio as per the topic. I tuned according to the guidelines from the topic https://www.elektroda.pl/rtvforum/topic807225.html
    And here after replacing the components it seems to be ok , the stations are received , it hums and squeaks between stations but I still have doubts about further fixing the up and down heterodyne and gain. The description in @redlin's post does not agree with the hand sketch. Or does it rather refer to the drawing of the circuit board with the components? Someone could please spread out the placement of the tuning trimmers on the tuning capacitor (which one is which)? ct1 ct4 c9 and c15
  • #46 19666623
    patsi2
    Level 11  
    Hello Colleagues, I own a version of the R613. There is a phenomenon in it of losing gain of weak signals in the LW band. The signal of the One on 225 does not weaken. E.g. BBC on 198 loses strength after about a minute and the strength does not return. I suspect something with the ARW. Maybe someone has a similar experience?
  • #47 21003401
    Mateusz_konstruktor
    Level 36  
    I am adding photos of the third, but perhaps not the last, version of this radio.
    The IC working in the radio circuit is a TDA1220B, the speaker housing has a surround known from the radio appearing under the name Zosia.

    Interior of an old Polish radio receiver Ania R612 made by Unitra .

    Interior of an old Polish radio receiver Ania R612 made by Unitra .
  • #48 21003404
    Krzysztof Kamienski
    Level 43  
    Jacekser wrote:
    Manufacturers - especially of machines seem to have noticed this and started shaving the net of this information.
    This is true. Find me anything (shemat for example) of the hydraulics of a Polar 150 paper guillotine from the 1980s.
  • #49 21003568
    sq3evp
    Level 37  
    Mateusz_konstruktor wrote:
    I am uploading photos of the third, though perhaps not the last, version of this radio.
    The IC working in the radio circuit is a TDA1220B, the speaker housing has the surround known from the radio appearing under the name Zosia.
    .

    I tuned a long time ago, without equipment, by ear, 3 months of rummaging (mainly p.h.), but the effect was amazing - standing under the mast of the RTCN I received a signal from other RTCs about 100km away.
    The field from the transmitter was "going hot" and did not "cover" weak signals from distant transmitters.
    The radio is lost to me somewhere, but I remember that it sounded nice.
  • #50 21004331
    Mateusz_konstruktor
    Level 36  
    @sq3evp
    A colleague says that the version built on the TDA chip has some design advantage?
  • #51 21004813
    sq3evp
    Level 37  
    I can't remember what it was, but it worked nicely.
  • #52 21017826
    DIORADIO
    Level 32  
    I must point out that you do not really distinguish "what's in the grass". UNITRA was a union of electric and electronic factories and those which produced hybrid circuits and tubes, adapters (gramophones), e.g. Diora, WZT, GZT, Eltra etc. in the last century. And if you look well there is a manufacturer's inscription ELTRA on Ani and that is the difference between the manufacturer and the Union. It's a fact that there was a "cap" but that's the way it was. Radmor belonged to this group and in order to produce radios for the army, militia and fire brigade, they had to have the "green" and where to get the green - from those who produced for the west (for export). My condolences to the directors of these plants.
  • #53 21018547
    sq3evp
    Level 37  
    Yes, my colleague is right.
    UNITRA was a union, but Unitra ELTRA was a product of the Bydgoszcz plant.
    Only Radmor has survived to this day - it does something for the military.
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Topic summary

The discussion centers on the interior and technical aspects of the Polish Ania R612 radio receiver produced by Unitra, including its design, components, and repair experiences. The Ania R612 features a three-knob interface for range selection (UKF/FM, K, S, D bands), tuning, and volume control with a switch. The radio was rescued from waste and is noted for its historical and technical value despite modest market worth. The PCB manufacturing process in the era involved hand-drawn layouts, photographic negatives, and screen printing on phenol-formaldehyde laminate, which is mechanically brittle and prone to track peeling when overheated. The radio uses integrated circuits such as the TDA1220B, TA2111N, and CXA1691, with some versions incorporating the TDA1083. The Ania R612 is related to East German designs like the Stern Radio Berlin SR30 (Ania R614), produced cooperatively within the Eastern Bloc, with components often sourced domestically or from allied countries. Repair challenges include fragile PCB tracks and tuning difficulties, with some users reporting signal gain loss on LW bands possibly linked to automatic gain control (AGC) issues. The discussion also touches on the broader context of Unitra as a union of factories including Eltra, Diora, and Radmor, and the export of Polish radios under various brand names such as Royal, Quelle, Universum, and ITT. Modern equivalents and successors use different ICs like the CXA1119. The conversation includes references to schematic availability, tuning procedures, and the historical significance of these radios in the communist era's technical landscape.
Summary generated by the language model.
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