• Country
• Germany

• Manufacturer / Brand
• Blaupunkt (Ideal), Berlin, später Hildesheim

• Year
• 1952/1953

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 19184

• • alternative name: Ideal-Radiotelephon- und App-fabr. || Ideal-Werke AG; Berlin (ab 1934)
  • Brand: Rotstern

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 4

• Valves / Tubes
• UF41 UCH81 UBF80 UL41

• Number of Transistors

• Semiconductors
• RL105 E220C80

• Main principle
• Superheterodyne (common); ZF/IF 450 or 473/10700 kHz; Reflex

• Tuned circuits
• 6 AM circuit(s)     9 FM circuit(s)

• Wave bands
• Broadcast, Short Wave plus FM or UHF.

• Power type and voltage
• AC/DC-set / 110; 125; 220-240 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical

• Power out
• 4 W (unknown quality)

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Romanze B521UP - Blaupunkt Ideal, Berlin,

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 340 x 222 x 168 mm / 13.4 x 8.7 x 6.6 inch

• Notes

• Blaupunkt Romanze B521UP nutzt die UF41 bei UKW als HF-Vorstufe und NF-Vorstufe (Reflexschaltung).

  UKW-Demodulator: Diskriminator mit einer Germanium-Diode RL105 und einer Röhren-Diode der UBF80.

• Net weight (2.2 lb = 1 kg)
• 4.5 kg / 9 lb 14.6 oz (9.912 lb)

• Price in first year of sale
• 192.00 DM

• External source of data
• Erb

• Source of data
• Kat.d.Rundf.GrossH.1952/53

• Literature/Schematics (1)
• -- Original-techn. papers.

• Other Models

• Here you find 3587 models, 3275 with images and 2328 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Blaupunkt (Ideal), Berlin, später Hildesheim