- Country
- United States of America (USA)
- Manufacturer / Brand
- MILITARY U.S. (different makers for same model)
- Year
- 1954–1985
- Category
- Military Receiver
- Radiomuseum.org ID
- 68887
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 24
- Valves / Tubes
- 6DC6 6AK5W 6AK5W 6C4 6C4 6C4 6BA6W 6BA6W 6BA6W 6BA6W 6BA6W 6BA6W 6AK6 6AK6 6AK6 5814A 5814A 5814A 5814A 5814A 5814A 5814A 26Z5W 26Z5W 3TF7 0A2
- Main principle
- Superhet with RF-stage
- Wave bands
- Broadcast plus more than 2 Short Wave bands.
- Power type and voltage
- Alternating Current supply (AC) / 115/230 Volt
- Loudspeaker
- - This model requires external speaker(s).
- Material
- Metal case
- from Radiomuseum.org
- Model: R-390A/URR - MILITARY U.S. different makers
- Shape
- Rack
- Dimensions (WHD)
- 19 x 10.5 x 16 inch / 483 x 267 x 406 mm
- Notes
- AM/CW/MCW; dual/triple conversion; (32) 1-MHz bands; xtal and mech. filter. 54000 sets made by Collins and other manufacturers as well Motorola, Stewart-Warner, EAC, Capehart, AMELCO, Fowler, Teledyne, Dittmore-Freimuth and Helena Rubenstein (last was original, but relabled Collins).
- Net weight (2.2 lb = 1 kg)
- 29.5 kg / 64 lb 15.6 oz (64.978 lb)
- Price in first year of sale
- 2,500.00 $
- External source of data
- Konrad Birkner
- Mentioned in
- Communications Receivers
- Literature/Schematics (1)
- Shortwave Receivers - Past & Present (3rd ed.)
- Author
- Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.
- Other Models
-
Here you find 407 models, 359 with images and 213 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from MILITARY U.S. (different makers for same model)
Collections
The model is part of the collections of the following members.
- Konrad Birkner † 12.08.2014 (D)
- Martin Bösch (CH)
- Chou Chiang-ping (TW)
- Emilio Ciardiello (I)
- Josep Garcia-Menchon (E)
- Hidehiro Hirose (J)
- Thomas Leiper (USA)
- James Miller (USA)
- Musée des Radios Museum (CH)
- Bryce Ringwood (ZA)
- Fabio Sarcina di Fidio (I)
- Ioannis Tzavaras (GR)
- Georges Werts (B)
- Christian Willers (D)
- Robert Ziolkowski (USA)
- Mümin Önüt (D)
Museums
The model can be seen in the following museums.
Forum contributions about this model: MILITARY U.S.: R-390A/URR
Threads: 1 | Posts: 1
R-725 is a direction-finding set with an IF strip similar to the R-390, developed by Motorola and built by Servo and Arvin. No more than 300 sets produced.
R-1274/GRC-129 model is a special variant, widely in use by the NASA for the APOLLO effort.
For further information see Fred Osterman: Shortwave-Receivers - past and present.
Eilert Menke, 23.Apr.04