Knight R-100 Amateur Communications Receiver សៀវភៅណែនាំណែនាំ
knight R-100 Amateur Communications Receiver Kit R-100 Amateur Communications Receiver Kit AN ULTRA-SENSITIVE, DELUXE RECEIVER FOR THE HAM ... A REAL "DX-GETTER"! Better Than 1.5-Microvolt Sensitivity on All Shortwave Frequencies Continuous Variable Selectivity from 300 cps to 4.5 Kilocycles Special…