• Country
• Soviet Union

• Manufacturer / Brand
• MILITARY USSR (different makers for same model)

• Year
• 1950–1954

• Category
• Military Receiver

• Radiomuseum.org ID
• 115693

• Number of Tubes
• 15

• Valves / Tubes
• 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л 2Ж27Л

• Main principle
• Superhet, double/triple conversion; ZF/IF 1235/465 kHz; 1 AF stage(s)

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Line / Batteries (any type) / 110-220 / 24 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Delfin R-251 - MILITARY USSR different makers

• Shape
• Boatanchor (heavy military or commercial set >20 kg).

• Dimensions (WHD)
• 510 x 400 x 450 mm / 20.1 x 15.7 x 17.7 inch

• Notes
• "Suchempfänger" der Funkaufklärung.
  1···11 MHz in 5 Bereichen, Trommelumschalter. VFO im Vakuumgefäss, regelbarer Doppelquarzfilter. Betriebsarten CW/AM. 2 hochohmige Kopfhörer, ZF/AVR-Ausgänge für Diversity-Empfang vorhanden. Eingebautes Netzteil mit ferromagnetischer Stabilisierung, externer Batteriesatz oder Umformer möglich.

• Net weight (2.2 lb = 1 kg)
• 56 kg / 123 lb 5.6 oz (123.348 lb)

• Source of data
• - - Data from my own collection

• Mentioned in
• V.I. Shapkin, "The Red Ears", Moscow 2003

• Other Models

• Here you find 59 models, 57 with images and 14 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from MILITARY USSR (different makers for same model)