THE RADAR RECEIVER 



745 



"spike" which precedes conduction will be attenuated and, therefore, less 

 interfering with AFC operation. Further details of this effect will be dis- 

 cussed in a later section of this paper. 



CRYSTAL 



CONTAINFR 



WITH 



CRYSTAL 



Fig. 28. — Converter and IF preamplifier assembly for AN/APQ-13 and AN/APQ-7 

 airborne radar bombing equijiments. 



CRYSTAL 



CURRENT TEST, 



POINT 



+300 VOLTS 



Fig. 29. — Simplified schematic diagram of IF preamplifier component of Figure 28. 



Another example of equipment design of an airborne radar converter and 

 preamplifier assembly has been illustrated previously in Fig. 23. In this 

 design the 6AK5 tube is employed and single-tuned interstages and auto- 

 transformer input and output networks are employed; however, the general 

 arrangement is quite similar to the design previously described. 



The remainder of the IF amplifier gain required is of the order of 80 to 



\ 



