Preliminary Models of Model XTBR-1 Receiving Equipment
Abstract
The object of the test was to determine compliance with specifications, reference, of one Type CRV-46053 receiver and one Type CRV-20053 receiver power unit, as a complete receiving equipment and a part of the Model XTBR-1 equipment as a whole. The subject receiver is essentially a Model RAL receiver with modifications adapt it to the Model XTBR-1 equipments. The modifications consist essentially of the provision of a protective panel cover for the receiver with a rubber gasket between the panel and case, and dynamotors in the power unit for D.C. operation. The cover furnished, however, affords mechanical protection only. The panel controls are not protected from spray, and eleven of the controls enter the panel with a slip fit, which would probably protect the inside of the receiver from occasional applications of spray, but not from any considerable amount of water. The power unit is definitely not spray proof. Construction throughout is mostly similar to the Model RAL, and the workmanship is good with slight exceptions. Some improvement in the accessibility of ports is noted over the Model RAL. In electrical performance, all specification requirements are met with but one possible minor exception as regards attenuation characteristics, which may or may not be considered a defect. It is very similar to the Model RAL. Failure of the receiver to operate after the 72-hour humidity test is believed to be due to breakdown of the rubber insulation on the high frequency loads, satisfactory operation being obtained after the second test, when these leads were cleared. This equipment is considered as satisfactory for Naval use after recommendations have been accomplished.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 20, 1937
- Accession Number
- AD1155284
Entities
Organizations
- United States Naval Research Laboratory