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R-392/URR

by Josh Rovero, KK1D

Updated: January 26, 2013

The R-392 is the "little brother" of the famous R-390. It is essentially a R-390 that is repackaged in a rugged and more compact form factor for use in vehicles and field command posts. It operates from 24-28 volt DC power with no vibrators, dynamotors or other voltage converters. The radio's case has no vents (with proper connectors the radio is immersion proof). Usually the inside of these radios is pristine no matter how ugly the outside may be!

References:

  1. Army TM 11-858, "RADIO RECEIVER R-392/URR"
  2. "Communications Receivers, The Vacuum Tube Era 1932-1981", 3rd Edition, by Raymond S. Moore
  3. Contributors...

Photo by Carl Battista, KB9ZIS.

Another image: R392 LINE DRAWING, B&W 25K GIF, 800x800.

Very nice perspective photo from Tom Norris' Mil List and KA1GTT. Shows the ribbed style case (there were other styles). Tom has also graciously provided photos of the inside top and bottom, plus the almost always missing special tools of the R-392.

Color R-392 photo by Keith, KK5FE, 68K bytes, with good detail.

Barry Hauser bought a completely solid-stated R-392 which also runs on 12 vice 28 VDC. Here are photos of the front panel and the IF/AF/PTO/Calibrator modules. All tubes have been replaced by either single transistors or small IC modules.

Mike Dinolfo has a nice R-392 web page, with details on component replacement and modifications.

More R-392 images from Google Image Search



A Japanese R-392? Now with even more photos/diagrams!

The solid-state son of R-392? The Collins R-864. New R-864/R-392 comparison photo.

The Marine Corps answer to the R-392, the R-808

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392ft.jpg
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Josh Rovero,
Aug 1, 2011, 4:23 PM
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Josh Rovero,
Aug 1, 2011, 4:22 PM
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Josh Rovero,
Aug 1, 2011, 4:22 PM
ą
Josh Rovero,
Aug 1, 2011, 4:27 PM
ą
Josh Rovero,
Aug 1, 2011, 4:23 PM
ą
Josh Rovero,
Aug 1, 2011, 4:23 PM
ą
Josh Rovero,
Aug 1, 2011, 4:27 PM
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