• Country
• Soviet Union

• Manufacturer / Brand
• Nizhegorodsky Lenin Works (NITEL)

• Year
• 1948–1956

• Category
• Commercial Receiver (may include amateur bands)

• Radiomuseum.org ID
• 73057

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

• Number of Tubes
• 8

• Valves / Tubes
• 6К7 6К7 6К7 6К7 6К7 6К7 6А7 6Х6

• Main principle
• Superhet with RF-stage; ZF/IF 112 kHz

• Wave bands
• Broadcast, Long Wave and more than two Short Wave bands.

• Power type and voltage
• Storage and/or dry batteries / 25,5 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: US PR-4 PR-4V - Nizhegorodsky Lenin Works

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 320 x 135 x 180 mm / 12.6 x 5.3 x 7.1 inch

• Notes

• Information by member Valery Gromov: "This PR-4P post-war model is existant since 1948, made by Radio Works No. 197 of Gorky-city (nowadays Nizhny Novgorod). The civil name of the factory was "Lenin Radio Works of Gorky-city" (Gorkovsky Radiozavod named after Lenin).

  There is the two quite different models Air Force model US-4, using metal tubes with 6.3V filaments, and the US-4S infantry model, using glass tubes with 2V filaments. Both US-4 and US-4S were manufactured at Novosibirk Radio Works No. 590 (civil name "Novosibirsky Electrosignal") starting from 1943. It is unclear why there was already an US-4 designation for the HRO copycat in 1940 that was manufactured in Riga for the Red Army but was soon taken over by the Germans - and can now be found with the Wehrmacht Reichsadler."

  Old information: AM/CW-receiver for millitary/airborne use, coverage from 0.17 to 12 MHz in five ranges. Needs Hi-Z headset. At first time radio set named US (universal superheterodyne),US-3 (in 1942), after WW2 named US-P, only last models named as PR-4 (P, R, V). Till 1941 produced in one of Moscow factories. After 1941 manufactured in Nizhegorodsk. Used as receiver-block in radio-stations RAF, RSB etc. Used motor type voltage conversion unit(Dynamotor/umformer) type RUK-300V (see foto). It works at 25,5V and supply radio tubes 6,3V (heating) and 200-220V (anode).

• Net weight (2.2 lb = 1 kg)
• 6 kg / 13 lb 3.5 oz (13.216 lb)

• Author
• Model page created by a member from D. See "Data change" for further contributors.

• Other Models

• Here you find 12 models, 12 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Nizhegorodsky Lenin Works (NITEL)