Model: R-390A/URR
Antique radios, Old Time Radios
R-390A/URR
Country:
United States of America (USA)
Manufacturer/Brand:
Collins Radio Company; Cedar Rapids (IA)
Year: 1954 – 1985
Type:
Receiver used for civil commercial purposes, e.g. point-to-point maritime or aviation communications, used or second hand sets often used by radio amateurs. Often used also for military communications, partly special variants to military specifications.Communication Receiver (also Amateur)
Mod.-ID = 68887
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Schematics etc.: 6 (for
members)
Principle
Superhet with a preamplification stage.
Please use «To add informations to model» if you know more! Thanks.
Récepteur TSF superhétérodyne avec préamplification de HF.
Superhet mit HF-Vorstufe.
Superhet with RF-stage
Wave bands
Bei der KW kann es sich um einen Gesamtbereich plus gespreizte Bänder oder um mehrere Bänder ohne Gesamtbereich handeln.Broadcast plus more than 2 Short Wave bands.
Power type and voltage
AC set plus voltage range.
/ = 2 different voltages
- = voltage from-to
* = «Special»
Apparareil à courant alternatif. Tensions mentionnées.
/ = 2 Spannungswahlen
- = von-bis
* = Fabrikwahl/«Spezial»
Trafo ist nicht immer mit Primär- undSekundärwicklungen versehen. Dadurch kann das Chassis ein gefährlichesPotential führen.Alternating Current supply (AC) / 115/230 Volt
Loudspeaker/pwr.out
This set has no built-in loudspeaker. It requires a separate loudspeaker or headset - or the set has no speaker output (not a radio).
Cet appareil n`a pas d`haut-parleur.
Das Gerät verfügt nicht über einen eingebauten Lautsprecher - entweder weil er nicht nötig ist (Gerät hat keine Tonwiedergabe) oder weil er separat zu stellen ist - bzw. das Gerät ist für Kopfhörerbetrieb.- For headphones or amp.
from Radiomuseum.org
Model: R-390A/URR
Material
Metal case.
Caisse en métal.
Gerät, dessen Gehäuse aus Metall gefertigt ist. Es kann sich um verschiedenartige Metalle und Oberflächenbearbeitungen handeln. Ist es hingegen nur ein Chassis, so erhält das Gerät eine andere Bezeichnung.Metal case
Shape
Rack
Dimensions (WHD)
19 x 10.5 x 16 inch / 483 x 267 x 406 mm
Valves / Tubes
24:
6DC6
(more
for members)
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).
This model was suggested by Konrad Birkner.
In passendes Gehäuse der Fa. Schroff eingebaut (Typ 10225-315, 6HE).
produced by Amelco, contract 35064-PC-62
EbayDE 9723297790 userrahi
More pictures
More information on
R-390A/URR (Collins Radio Company; Cedar Rapids (IA))
Having to pull the RF Deck to clean the bandchange switch wafers (a chore that I seem to have to do every two tyears or so) reminded me of the need to re download the Y2K manual http://www.hausernet.com/r390a/ . This is not the original technical manual mentioned in previous posts.
Thanks to the authors for putting this together. Apologies to forum members who may have this revised manual with some colour pictures, but it may be of interest to new owners.
http://bama.edebris.com/manuals/military-kg7bz/r390a/ mni tnx to KG7BZ
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.
