R-274_A_C_D_使用说明书手册_维修维护电器原理图手册_KG7BZ_TM11-897_1962

C1,TM11-897T016-35R274-5TECHNICAL MANUALRADIO RECEIVERS R-274/FRR AND R-274D/FRRCHANGESDEPARTMENT OF THE ARMYNo.1WASHINGTON 25,D.C.,1 May 1954TM 11--897,14 May 1952,is changed as follows:7.Description of Radio Receiver R-274/FRRThe title of the manual is changed to read:Radio Receiver R-274/FRR +switch ofRADIO RECEIVERS R-274/FRR AND R-274D/FRRthe receiver.A neon lamp is connected across theleads to the contacts of the antenna disabling relayAdd "and R-274D/FRR"after Radio Receiverof Radio Receiver R-274D/FRR on serial numbersR-274/FRR throughout the manual,except in the674 through 1266,Order No.3464-Phila-52.Thefollowing places:The purpose of this lamp is to proteet the inputFigure 2.Caption.antenna coil from damage due to high voltageParagraph 63.Chart;Figures 32 and 43.static surges.Figure 32.Caption.Figure 43.Caption