ECA RS-192-A

Abstract

<strong>INTRODUCTION</strong> <br>This standard, which shows quartz crystal unit holder outlines and pin connections, includes the outlines previously shown in RETMA Standard RS-192, July 1957; those of interest to the U. S. published in International Electrotechnical Commission (I.E.C.) publication 122-3; those being considered by I.E.C. committee TC-49; and the latest outlines now in commercial use reviewed by EIA committee TR-26. These outlines have been regrouped, and different number assignments have been made from those given in RS-192 in order to place all plastic, vacuum tube type, and metal type holders in a more logical sequence. <br>A cross reference is given to show the similarities between the numbered holders in this standard and the military types. <br>The dimensional letters and arrangements are essentially in conformance with the recommended practice for preparation of outline drawings of electron tubes as set forth in EIA Standard RS-202-A, January 1964. Millimeter-inch conversions and tolerances have been assigned in accordance with I.E.C. 39 (CO) 135 dated a Nov 63. <br>The list of pin connections for crystal vibrators in the various holder types are the same as those accepted by I.E.C. committee TC-49 as set forth in I.E.C. 49 (CO) 9 dated Feb 64.