Jan 28, 2017 . Scanner Frequencies and Radio Frequency Reference for Polk County, Iowa (IA)Jan 28, 2017 . Scanner Frequencies and Radio Frequency Reference for Dallas County, Iowa ( IA). …. Des Moines Repeater, Ham. 53.250000, 51.55000, Polk, IA, General Ham Radio, Grimes 6M, Grimes R. Scanner Frequencies for NULL Des Moines county IA US.Scanner Frequencies for Des Moines Polk county IA US.Central Iowa Amateur Repeaters Monitoring several of the amateur radio frequencies in the Des Moine. Nov 12, 2015 . Central Iowa Public Safety Live Audio Feed.. Des Moines(Fire) plus Iowa State P. Polk County, Iowa, and Des Moines, Iowa, use analog radio frequencies and trunked and digital commu.