The concept of the radio receiver was developed in 1947. Its mass production, however, began much later, in September 1950. In 1952 the radio underwent some modifications and was sold under the name Mir M 152. I have no idea what the modifications were. I have not found any reliable information on this. Some detailed information about the radio can be found on the page M137. According to the content given there:
"One of the features of the Latvian radio receiver M 137 is the scale in which the sight is combined with the indicator of the range switch. In each of the 5 bands, a bright dot on a red background indicates the tuning frequency of only the selected band. The line goes off in reception mode. Radio speaker - 10GDP-VEF (10 W) with a 250 mm diffuser. Among the creators of this radio was Gintauts Aboltins-Abolins, later a well-known constructor of the Orbita design office, and from 1968 the head of the Department of Design and Production Technology of Electronic Devices at the Radio Engineering Faculty of the Riga University of Technology.
In the Vefietis newspaper you can find articles about console radios based on the Latvija M137 receiver. One carries the inscription "To my dear leader, father and teacher Józef Vissarionovich Stalin on the 30th anniversary of the Komsomol from Komsomol members and youth of Riga." Another one was created on the occasion of the 10th anniversary of the LSSR in July 1950."
The radio is impressive. When I was in his possession, my reaction was clear.
Photo 1. I tried to whistle, of course, but my mouth was dry with admiration.
I showed the radio to cats, which usually hang around, and unfortunately I was a bit disappointed. Their reaction was quite different. They did not even deign to leave the armchair:
Photo 2. The one above is Cypis, the one below is Deedee (second name ZEA). Cats are said to sleep 70% of their lives. Cypis sleeps 95%.
Let us return, however, to the topic of description. Here is the radio in all its glory.
- Sensitivity: not less than 50 μV
- The output power of 6 W in the frequency range 60 Hz ÷ 6500 Hz
- Power drawn from the network: 190 W
- Supply voltage: 110V / 125V / 220V
- Dimensions: 642 mm / 406 mm / 292 mm
- Weight: 30 kg (I found out about it turning the radio while taking the photos below).
More detailed data:
- Long waves: 150 kHz ÷ 410 kHz (2000 m ÷ 730 m)
- Medium waves: 520 kHz ÷ 1500 kHz (577 m ÷ 200 m)
- Short wave I: 4.28 MHz ÷ 8.57 MHz (70 m ÷ 35 m)
- Short wave II: 8.53 MHz ÷ 12.2 MHz (35.2 m ÷ 24.6 m)
- Short waves III: 15.07 MHz ÷ 15.54 MHz (19.9 m ÷ 19.3 m)
- Intermediate frequency: 465 kHz.
- Tubes used: 6K7 x 3, 6A7, 6A8, 6X6C, 6C5, 6H7C, 6P3C x 2, 6E5C, 5Ц4С x 2
Now it remains to sit comfortably, stock up on a suitable drink (of course I mean mineral water) and look at the photos. Remember how much effort it took to turn this 30-kilogram monument of radio technology.
Photo 4. One more shot from the front (from a different angle).
Photo 5. And it was not without a shot from the so-called "ass" side. Wonder!!!
And now it's time for a few dozen, I repeat SEVERAL dozen photos. Some are not much different except for a different camera angle. But since I've worked with them, why not put them in the Gallery.
And that was it. Congratulations to everyone who made it to this place.
Elaborated by: Grzegorz Makarewicz "gsmok"