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Interior of an old Polish radio receiver UNITRA Sniezka R-207

p.kaczmarek2 14202 97
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #31 18957703
    pawelr98
    Level 39  
    Gismot wrote:
    flinc wrote:
    Adding to the subject, the soldering of the 75 Ohm input hot-mass socket
    .
    After this modification the equipment will lose value ;) .
    .

    I there both the DSP-301 and the Tambourine simply give the cable straight into the 300Ω socket and there have been no reception problems.

    But no exaggeration with this loss of value.
    In the DSP-301, I did the whole tip over again.
    2xUL1481 replaced with TDA2009 because one UL1481 was faulty, and to duplicate a faulty design (UL1481 has no protection above 15V, where 18V was) there is nothing to do.
    DIN speaker connectors replaced with banana connectors, original mount removed, a piece of sheet metal cut out and drilled to fit in place of the original.
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  • #32 18958273
    Oximon
    Level 27  
    I came across such a receiver some time ago. Probably very amateurishly tuned, because it has hopeless sensitivity. I haven't looked inside yet. Do you know where to look for the problem? On an external Sonus FM antenna the Solo can lose stations when you walk around the room.
  • #33 18962807
    marcinmaster999
    Level 11  
    I didn't use a converter and by stretching the coil it works, although it has lost some selectivity.The radio has only sentimental value.
  • #34 18968262
    kris116a
    Level 2  
    And I was working in a branch office of Dior in Zgorzelec and tuned this invention on the tape numbers stamped on the PCB
    pcz 103 and wcz 208 Krzysztof G. Zgorzelec
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  • #35 18974665
    ^ToM^
    Level 42  
    I constantly see these radios at the local PSZOK. The really nice ones I take, repair or tune and pass on to friends. I only take radios in perfect visual condition. I don't take the ugly ones because nobody wants them. About two weeks ago I transported a practically new R-510 Taraban 3.
  • #36 18982423
    a2b
    Level 15  
    These times should probably be forgotten and not resurrected as monuments to that despicable period of occupation.
    It was a time that was wasted, a time when something could have been achieved but was not, everything was lost and blocked.
    We could do good and modern things but it was not allowed. The same applies to the automotive industry and indeed to all branches of technology.
    Please pay attention to what Pioneer, Sony, Akaii, Sanyo and many others were producing at that time.
    I do not want to remember those times .
  • #37 18982728
    mczapski
    Level 40  
    a2b wrote:
    This time should probably be forgotten and not resurrected those devices , monuments of that despicable period of occupation .
    It was a time that was wasted, a time when something could have been achieved but was not, everything was lost and blocked.
    We could do good and modern things but it was not allowed. The same applies to the automotive industry and indeed to all branches of technology.
    Please pay attention to what Pioneer, Sony, Akaii, Sanyo and many others were producing at that time.
    I do not want to remember those times .
    .
    Is anyone forcing a colleague to use/watch this equipment? A view like that of Frani's washing machine as if in the forefront of development such equipment never existed. If there are people who are fascinated by the technology of the time then why prohibit/obstruct them from doing so? And that equipment from fifty years ago is of little use is true. This is also the case with equipment from overseas.
  • #38 18983176
    ml
    Level 30  
    >>> a2b

    And today's time? Point out the difference between the audio-video equipment produced today by Polish factories and the equipment of manufacturers from Japan. Compare our Polish cars of today with those manufactured in Korea, for example. But please ask for specific models. Well, how is it or was it with the "occupation"? From what do you conclude that someone forbade the production of "good and modern things"?
  • #39 18983354
    a2b
    Level 15  
    ml wrote:
    >>> a2b

    And today's time? Point out the difference between the audio-video equipment produced by Polish factories today and the equipment of manufacturers from Japan. Compare our Polish cars of today with those of Korean manufacturers, for example. But please ask for specific models. Well, how is it or was it with the "occupation"? From what do you conclude that someone forbade the production of "good and modern things"?
    .

    Today, therefore, there is nothing, we do not produce anything because it is the aftermath of the occupation of which I wrote earlier the time when you could achieve something was wasted the rest was stolen and that is why we have what we have .
    Either you are too young or you do not remember who forbade the production and construction of good things in those days .

    here are some polish audio producers
    - http://bmn.com.pl/
    - http://www.fonicamusic.com/
    - http://esa.com.pl/
    - http://www.baltlab.pl/o-nas
    There are quite a few good manufactures .
  • #40 18983359
    d-t-x
    Level 21  
    Again, the enemy stood in our way of success.
  • #41 18983609
    ml
    Level 30  
    Straightforward diversion or sabotage.
  • #42 18983674
    pawelr98
    Level 39  
    a2b wrote:
    This time should probably be forgotten and not resurrected those devices , monuments of that despicable period of occupation .
    It was a time that was wasted, a time when something could have been achieved but was not, everything was lost and blocked.
    .

    I am young and still like to tinker with it .

    As for an amateur, the simplicity of construction is a very important factor.
    Nowhere else is it so simple to learn the construction and operation of a radio as on these primitive radios. Tuning such a radio is a fun weekend project. The Diora DSP-301 (acquired from a dumpster) consumed quite a few hours, as I made a new power amplifier for it from scratch. The tambourine consumed a lot of hours due to tuning problems (I learnt a lot from this as I tuned first). Only the TU960 (AS632) was trouble-free as everything worked and the tuning (export box, domestic head for some reason) went smoothly.

    Well, and the equipment from the USSR was cool too. Thick cast frame, laminate covered with thick varnish and a different look at technology.

    You can't learn that much on modern equipment and it's rather boring.

    And yes I have a large table radio with chrome inserts that looks nice in the room and is still functional.

    Somehow the Americans, despite their technological backwardness (it may sound a bit strange, but apart from computers their consumer electronics and automobiles were backward) also dabble in repairing there equipment and do not complain that it is inferior to analogous equipment from the rest of the world.
  • #43 18983734
    a2b
    Level 15  
    pawelr98 wrote:
    a2b wrote:
    This time should probably be forgotten and not resurrected those devices , monuments of that despicable period of occupation .
    It was a time that was wasted, a time when something could have been achieved but was not, everything was lost and blocked.
    .

    I am young and still like to tinker with it .

    As for an amateur, the simplicity of construction is a very important factor.
    Nowhere else is it so easy to learn how to build and operate a radio as on these primitive radios. Tuning such a radio is a fun weekend project. The Diora DSP-301 (acquired from a dumpster) consumed quite a few hours, as I made a new power amplifier for it from scratch. The tambourine consumed a lot of hours due to tuning problems (I learnt a lot from this as I tuned first). Only the TU960 (AS632) was trouble-free as everything worked and the tuning (export box, domestic head for some reason) went smoothly.

    Well, and the equipment from the USSR was cool too. Thick cast frame, laminate covered with thick varnish and a different look at technology.

    You can't learn that much on modern equipment and it's rather boring.

    And yes I have a large table radio with chrome inserts that looks nice in the room and is still functional.

    Somehow the Americans, despite their technological backwardness (it may sound a bit strange, but apart from computers their consumer electronics and automobiles were backward) also dabble in repairing there equipment and don't complain that it's inferior to analogous devices from the rest of the world.


    And I am old and I remember how it was when there was nothing and to buy what you are now restoring you stood in queues or you had to have connections,And equipment of the western class could be seen in pewex (https://pl.wikipedia.org/wiki/Pewex)
    That is why the memories of those times annoy me
    kind regards
  • #44 18984304
    pawelr98
    Level 39  
    a2b wrote:
    .
    And I am old and I remember how it was when there was nothing and in order to buy what you are restoring now you had to stand in queues or you had to have connections, And you could see the western class equipment in pewex (https://pl.wikipedia.org/wiki/Pewex)
    That is why memories of those times irritate me
    Greetings
    .

    I would scrap at most these car-like products.
    Fiats and Polonezes.

    My grandparents had equipment from Pewex and other things downloaded through side channels.
    A Japanese TV from Pewex after more than 20 years was given to the hospital because it was bought LCD. An '88 Sanyo VCR bought at a bazaar (for the price of a car) I recently took apart myself, keeping the clock and date control electronics fully operational.

    Whoever had the money could buy one anyway.
    My grandfather and grandmother were engineers. And they were able to do it all without party history.
    Grandfather himself refused an offer to join the party in exchange for the position of director. I even have documents somewhere stating his lack of political involvement on one side or the other (an opinion written down by some party apparatchik).


    However, you have to give credit to the electronics of the period for being durable.
    I have a G4-107 generator 1977, an S1-107 oscilloscope 1992, a Tambourine radio I think 1974, a "Duet" radio 1977, a TU960 radio 1985.
    Everything works as it should despite the years.

    At the university, a bunch of meters from the 60s/70s are still running smoothly.
    I've worked on them in laboratories. There are even devices over 100 years old, which also work faultlessly.

    I know that the communist era was a shambles. I've heard enough from my grandparents and parents and I'm a bit interested in the history of technology.
    But as this equipment is already here, it's worth playing with it and working on it.
    It's made in such a clumsy way that it will live for many years to come.
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  • #45 18984374
    a2b
    Level 15  
    pawelr98 wrote:
    a2b wrote:
    .
    And I am old and I remember how it was when there was nothing and in order to buy what you are restoring now you had to stand in queues or you had to have connections, And you could see the western class equipment in pewex (https://pl.wikipedia.org/wiki/Pewex)
    That is why memories of those times irritate me
    Greetings
    .

    I would scrap at most these car-like products.
    Fiats and Polonezes.

    My grandparents had equipment from Pewex and other things downloaded through side channels.
    A Japanese TV from Pewex after more than 20 years was given to the hospital because it was bought LCD. An '88 Sanyo VCR bought at a bazaar (for the price of a car) I recently took apart myself, keeping the clock and date control electronics fully operational.

    Whoever had the money could buy one anyway.
    My grandfather and grandmother were engineers. And they were able to do it all without party history.
    Grandfather himself refused an offer to join the party in exchange for the position of director. I even have documents somewhere stating his lack of political involvement on one side or the other (an opinion written down by some party apparatchik).


    However, you have to give credit to the electronics of the period for being durable.

    I know that the commune was a shambles. I have heard enough from my grandparents and parents and I am a little interested in the history of technology, but...


    The biggest foolishness that I can not understand was to buy a new baby car for vouchers or vouchers waiting for it for years and the curiosity of its price which increased by a crore after driving on the street from Polmozbytu , today we would all be rich if it was :D
    Colour TV Elektron or earlier Rubin was bought at the train station just after the arrival of the train from the eastern border of course for thick money with zero guarantee.
    Washing machine, etc. you could stand in line for 3 days and still did not get because just two arrived at the shop of which the shop manager had friends and needed three and even so would take more because he sold them at his garage .
    Battery for the car ........no yes what car Syrena, Trabant maybe Wartburg ... battery was not there you had to give your own to regeneration or stand your own - a disaster .It was cool remember Baterwit miracle cure for an old battery
    It could be written about for several pages.

    Your grandparents were certainly persecuted and their lives were made difficult, but I fully respect their attitude.
    Their attitude was the result of education and a clear view of the situation.

    It's true that electronics are durable, but do they hold up?
    In my line of business most of the devices, maybe not that old but, let's say, from the 90s, well made and durable are no longer suitable for anything if they do not have enough memory, they are too slow, they are based on older solutions.

    Please, pay attention while watching an American film from, say, the 60s, in every house there is a telephone, pay attention to kitchen equipment, cookers, dishwashers, food processors, coffee machines, etc., where were we then?

    Greetings
  • #46 18984801
    pawelr98
    Level 39  
    a2b wrote:
    .
    Please pay attention when watching an American film from, say, the 1960s, in every house a telephone, pay attention to the kitchen equipment, cookers, dishwashers, food processors, coffee machines, etc., where were we then?
    .

    Equipment with equipment, because this was due to economic differences.

    It's much better to compare what American equipment looked like from the 1960s upwards (because by then both the Japanese and the Germans had already reached their respective levels of development), compared to German or Japanese equipment. This shows where the American technological backwardness is.
    At the time, the Americans followed a philosophy similar to Mr Muntz's.
    That is, to make from as few components as possible, cutting costs wherever possible. The result was technological curiosities. Meanwhile, equipment from Germany or Japan was made honestly, without "cuts", despite similar prices. While the rest of the world was forging ahead, the Americans were standing still.
    In cars, they are still standing apart to this day.
  • #47 18984869
    a2b
    Level 15  
    pawelr98 wrote:
    a2b wrote:
    .
    Pay attention please when watching an American movie from say the 1960s, in every house a telephone, pay attention to the kitchen equipment, cookers, dishwashers food processors, coffee makers etc, where were we then?
    .

    Equipment with equipment, because it was due to economic differences.

    It's far better to compare what American equipment looked like from the 1960s upwards (because by then both the Japanese and the Germans had already reached their respective levels of development), compared to German or Japanese equipment. This shows where the American technological backwardness is.
    At the time, the Americans followed a philosophy similar to Mr Muntz's.
    That is, to make from as few components as possible, cutting costs wherever possible. The result was technological curiosities. Meanwhile, equipment from Germany or Japan was made honestly, without "cuts", despite similar prices. While the rest of the world was forging ahead, the Americans were standing still.
    In cars to this day they still stand out altogether.
    .

    Correct, but they could afford everything and they had everything.
    And as for American motoring, for the moment their backwardness in motoring is starting to be an advantage, at least for me, simple, durable designs, normal capacities from which natural power comes and not inflated by windmills. The only thing is that the interiors of the cars are ugly and made of poor materials.
  • #48 18985162
    szeryf3
    Level 29  
    Let's wait until the colleague a2b matures to the age of 50 - 60 years of life then he will change his mind on this subject.
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  • #49 18985561
    a2b
    Level 15  
    szeryf3 wrote:
    Let's wait until a colleague a2b matures to the age of 50 - 60 years of age then he will change his mind on this subject.

    on which subject ?
    and if I am already that age then what?
    I am already too old to change my mind.
  • #50 18986676
    szeryf3
    Level 29  
    On the subject of collecting old tube receivers.
  • #51 18987685
    a2b
    Level 15  
    szeryf3 wrote:
    On the subject of collecting cheap tube receivers.

    Sorry honourable friend I am of an age and do not collect and will not .
    I do not like antiques, I do not like old cars, equipment, furniture, I am just like that I often clean my workshop and throw away everything that I do not need and that I do not think I need recently.
    I prefer the new.
  • #52 18988818
    ^ToM^
    Level 42  
    James596 wrote:
    I have never liked these devices. Poor, mediocre sound without any depth, relative to the amount of space they take up.


    Well such was the high quality of communist appliances. There were years when if you wanted to buy one every piece had some kind of defect.

    Kasprzak .

    Diora .

    Comparing these products with the western competition of the time is simply quite ridiculous. :)
  • #53 18988832
    CodeBoy
    Level 33  
    ^ToM^ wrote:
    James596 wrote:
    I never liked these devices. Poor, mediocre sound without any depth, relative to the amount of space they take up.


    Well such was the high quality of communist appliances. There were years when if you wanted to buy one every piece had some kind of defect.

    Kasprzak .

    Diora .

    Comparing these products with the western competition of the time is simply quite ridiculous. :)
    .

    I recently found out that these Dior screws, which I hate, are the pinnacle of technology ;) And that it is a very good indestructible design :) .
    And to me they either get twisted and that is my fault, not that they made them out of plasticine :)
  • #54 18989502
    a2b
    Level 15  
    ^ToM^ wrote:
    James596 wrote:
    I never liked these devices. Poor, mediocre sound without any depth, relative to the amount of space they take up.


    Well such was the high quality of communist devices. There were years when if you wanted to buy one every piece had some kind of defect.

    Kasprzak .

    Diora .

    Comparing these products with the western competition of the time is simply quite ridiculous. :)
    .

    It was a joy to have been able to buy and that with a defect well .
    I remember a buddy buying a defective washing machine and how happy he was because it was defective or not at all.
  • #55 18990305
    James596
    Level 28  
    ^ToM^ wrote:
    .

    Well such was the high quality of communist appliances. There were years when if you wanted to buy one, every piece had some kind of defect.
    Comparing these products with the western competition of the time is just quite ridiculous. :)
    .

    I am not referring to a manufacturing defect. A fully operational Snowball simply plays poorly due to the lousy speaker when juxtaposed with the amount of space it takes up on the table. Ordinary German transistor receivers from the 1960s (e.g. Schaub Lorenz) were able to play much deeper despite their smaller dimensions, having a comparably large oval speaker.
  • #56 18990723
    ^ToM^
    Level 42  
    James596 wrote:
    .
    I am not referring to a manufacturing defect. A fully operational Snowball simply plays poorly due to the lousy speaker when juxtaposed with the amount of space it takes up on the table. Ordinary German transistor receivers from the 1960s (e.g. Schaub Lorenz) were able to play much deeper despite their smaller dimensions, having a comparably large oval speaker.


    The Snowball was a popular class receiver, hence by definition it could not play with any astonishing quality. I don't know where the admiration for a rubbish (even in communist times) receiver comes from.
    I used to have a Melodia 16 tube receiver and next to it was a Jubilat. The sound quality of the Jubilat was incomparably worse, even though it was a 20-year newer design.
  • #57 18992459
    ml
    Level 30  
    Well, the sound of 1980s radio receivers was so se. It was told by a loudspeaker, usually GD10-16/5 with good efficiency but poor reproduction above 10kHz. Smaller radios (Sniezka, Sudety) used GD8-12/1.5 with even weaker characteristics. Only in Taraban 3 there was Gd12/5 and in Maria, Sabina and Donat there was Gd10-16/4, Julia GDS10/16 with quite decent sound. Similarly, the radiomagnetophones - Daria on GD10/1.5, RMS303 a failure, but Klaudia, RMS404, Manuela, RMS451, RMS475, MK2500, Marta sounded OK.
    Compared to our Polish equipment, for which I have respect and worked through probably most of the models from the 1970s to the end of production, audio equipment from the west is two leagues difference in quality and four in price. I recently restored a Grundig Stereo Concert Boy 4000 to working order and, apart from the build quality, I was surprised by the sensitivity on UKF and the fact that the factory 1968 tuned stereo decoder needed no more than minimal adjustments. The sound of the receiver was fabulous, the size and weight a little less so. But what did we produce in 1968 that could compete with this radio (then for about 400DM)?
    What I am getting at - our industry produced and sold (at prices set somewhere above) equipment that was within the technical capabilities of the manufacturers and within the price range of the buyers. It was thinner than in the eNRF or France but it was there. I don't approve of that system, but I don't condemn it either, I was 19 years old when it collapsed and that was the beginning of the market economy, which I don't recommend to anyone......
  • #58 18992814
    szeryf3
    Level 29  
    In those days we had good engineers and technical thought at a high level, but so what, there was no hard currency for components from abroad. That's one, and two what mattered was the plan, which did not go hand in hand with quality.
  • #59 19015384
    breshnew
    Level 14  
    ml wrote:
    I beg to differ with what colleague ads wrote above.
    These receivers are easy to tune, rarely do you need to change coils and if you do, it is to change them for ones with higher inductance, reducing capacitance of capacitors in resonance circuits which results in broadening the received band and shifting it upwards (CCIR) . Unfortunately, the sensitivity and, above all, selectivity of these and similar radios is poor due to the simple ukf heads and HF path. It is possible to change the input transistor of the head to, say, BF240 but then the head or excitation at tuning to maximum sensitivity.
    .

    Hello,
    I agree, in recent times I have tuned Silesia, Hania, Manuela, Jowita, and some other Wilga's, in my opinion they tune almost non-invasively, the coils have not been terribly bent and they cover the whole bands. I am amazed by their simplicity, especially that the Silesians are already 40 years old, one of them is on 24/7 at my work all week long - I know that it will play like that for the next 40 years, it will surely outlive me. I know they are somehow primitive but wonderfully durable and elegant in their own way.
  • #60 19015665
    Rezystor240
    Level 42  
    I had this radio, also from electrical junk shows. I cleaned it, refurbished it as much as I could. I put it up for sale on Olx, and now it's pleasing to the ears and maybe even to the eyes.
    I currently have a Tambourine, it's fairly restored, tuned up and I even got it right. It receives a dozen or so stations.

    Added after 2 [minutes]: .

    As of today it looks like this, waiting to be bolted together.

    Interior of an old Polish radio receiver UNITRA Sniezka R-207 .

Topic summary

The discussion centers on the UNITRA Sniezka R-207, a Polish radio receiver from the 1980s/90s, focusing on its interior, tuning, and restoration. The radio features a veneered chipboard case with a plastic front panel marked "Snow Diora," mechanical tuning via a large knob, and a volume potentiometer. Users share experiences rescuing and refurbishing these radios, noting their durability and historical value despite modest sound quality and selectivity. Technical details include the use of air coils (L2, L3, L4) with specific winding turns (e.g., L4 at 3.5 turns with a half tap), and the heterodyne coil requiring careful tuning or rewinding to cover the CCIR band (87.5–108 MHz). The power amplifier often uses UL1481/UL1482 or equivalents like TBA810, with suggestions to replace transistors (e.g., BC211/BC313 with BD139/BD140) and speakers for improved performance. Common issues include a 100 Hz hum caused by power supply grounding design, which can be mitigated by additional grounding wires or disconnecting the incandescent bulb circuit. Electrolytic capacitors, especially from Elwa, generally remain in good condition unless exposed to adverse environments, but some users recommend checking and replacing those with high ESR. Modifications such as adding a 0.47 µF polyester capacitor across rectifier diodes help suppress high-frequency interference. The discussion also covers tuning techniques using frequency indicators, RTL-SDR devices, and voltmeters on the FM demodulator output. Some users caution against invasive tuning that alters original parameters, suggesting band converters for adapting to different frequency standards (OIRT vs. CCIR). The thread includes comparisons with other Polish models (R-208 Sudety, R-206 Snowbird, Taraban series) and mentions stereo decoder modifications using UL1621 ICs. The overall consensus appreciates the radios' simplicity, durability, and cultural significance, despite limitations in audio fidelity and component quality compared to Western equipment of the era.
Summary generated by the language model.
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