====== Additional Crystal Model 212 ====== {{xtal.jpg?|}} ===== Description ===== Optional plug-in crystal to extend 10 meter coverage of Models [[540]] and [[544]] from 29.0 to 29.5 MHz. Model 212 frequency is 14.990 MHz in an HC-25U case. (From the Ten-Tec Reflector October 16, 2004.)