RADIO RECEIVER 51J-4
year 1954

Collins 51J-4 Receiver is designed for communication applications where stability and dial accuracy of the highest order are the prime requisites. Under normal operating conditions, the receiver operates in the range of 540 Kc to 30.5 Mc with a total setting error and drift of less than 1 kc at any frequency within its range. The receiver is designed for amplitude-modulated and continuous wave reception, althought its accuracy and stability make it suitable for many applications where where it is desired to receive or set definite frequencieswithout searching or making frequent adjustments. This receiver incorporates the new mecchanical filter in the intermediate frequencyrange to obtain the desiderable rectangular-shaped passband.