Collins r-390 manual

MAINTENANCE MANUAL RADIO RECEIVER RA/URR This copy is a reprint which includes current pages from Changes 1 through 4. HEADQUARTERS DEPARTMENT OF THE ARMY 8 December R/URR, RA/URR. TM Change HEADQUARTERS DEPARTMENT OF THE ARMY NO. 2 WASHINGTON, DC, 28 June A Brief History of the Design. R/URR - Arguably, the R/URR and its later kin, the RA/URR, are the ultimate tube-type receivers. The first version of this incredible receiver was the R featuring 33 tubes (includes the 3TF7 ballast tube,) double or triple conversion, two RF stages, six IF stages, modular construction, three audio filter settings, six selectivity bandwidths and. This manual describes Radio Receiver R/URR (fig. 1) and covers its operation and operator's maintenance. It includes operation under usual conditions, methods of cleaning and inspecting the equipment, and replacement of parts available to first echelon maintenance. Throughout this manual, Radio Receiver R/URR will be referred to as the receiver. 2.

Operation test. part in the RA is designated by a 3 digit number (C, T, V, etc.). The RA is divided into several subchassis. Refer to the location chart on Page www.doorway.ru front panel and mainframe of the RA is the series subchassis. Any part, which has a part number beginning with "1" will be located on this subchassis (TB, K The R's and RA's are often found missing meters which allegedly gave off excessive radiation if meter case opened. Variants: The R ¹ is a DF variant prototype by Motorola, made by Servo and Arvin with an IF strip similar to the R's ( produced).

You are the proud owner of a Collins designed RA/URR general coverage, HF radio receiver. In many circles, the RA is considered to be the finest HF radio receiver ever built. Weighing in at 85 lbs, this electro-mechanical wonder was designed in the early 50's and released Febru which also happens to be my birthday. The RA is a general coverage radio receiver capable of receiving amplitude modulated, code, and frequency shift keying signals. Its tuning range is from kilohertz to 32 megahertz, in 32 one-megahertz bands. A Brief History of the Design. R/URR - Arguably, the R/URR and its later kin, the RA/URR, are the ultimate tube-type receivers. The first version of this incredible receiver was the R featuring 33 tubes (includes the 3TF7 ballast tube,) double or triple conversion, two RF stages, six IF stages, modular construction, three audio filter settings, six selectivity bandwidths and.