Serenada S 552 U
Electronica · 1955
- Manufacturer
- Electronica
- Country
- Romania
- Year
- 1955
- Decade
- 1950s
- Category
- Radio
- Type
- Radio receivers
- Documentation score
- 2/5
- Last edited
- 03 OCT 2026
Specifications
- Tubes
- UCH21, UCH21, UBL21, UY1N
- Wavebands
- LW, MW, SW (extension); pick-up input
- Sensitivity
- LW 300 µV; MW, SW 250 µV; pick-up 200 mV
- Selectivity
- 20 dB
- Audio frequency response
- 100–3000 Hz
- Output power
- 2 W
- Design / kits
- Hungarian kits
- Power supply
- 120 / 150 / 220 / 240 V, 50 Hz
- Power consumption
- 35 VA (120 V), 50 VA (other voltages)
Sources: [1]
Description
The Serenada S 552 U is a mains-powered tube radio receiver made in Bucharest by Radio Popular, the factory that became Electronica in 1960 [1]. It was assembled from kits imported from Hungary [1].
Serenada is one of the names of the popular-class table radios made at Radio Popular [1].
An engineer who started at Radio Popular in 1956 remembers the Serenada on the radio assembly line, which finished a set about every three minutes; the parts in the Hungarian kits varied so much in quality that they had to be sorted one by one before assembly [2].
In the source table, sensitivity is given for 50 mW output, selectivity at 1 MHz for ±10 kHz detuning, the audio frequency response at −6 dB relative to 400 Hz, and output power at 10% distortion [1].
Gallery
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Schematics
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References
- [1]D. F. Lăzăroiu, N. Millea et al. – „Electronica românească. O istorie trăită”, vol. I, AGIR, section II.2 „Fabrica Radio Popular, 1948–1959”, pp. 107 and annex II.2.5 „Lista receptoarelor produse la Radio Popular între 1948–1959”, pp. 121–123
- [2]D. F. Lăzăroiu, N. Millea et al. – „Electronica românească. O istorie trăită”, vol. I, AGIR, section VI.10 „Stagiatura la Radio Popular, anii 1956 – 1960”, p. 508