Avtech AVA and AVB models operate in thefrequency range of 200 to 400 MHz but the AVA is tunable over the full octave while the AVB is fixed-tuned. Frequency tuning of Model AVA is accomplished by varying the length of a miniature flexible coaxial cable between two SMA connectors. Models with the -C suffix require 100-240V, 50-60 Hz prime power.
