HFF4381-521 HFF4555BT HFFM HFF-MCF-127 /113.8MHZ HFF-MCF-127-113.800MHZ HFF-MCF-720-71.000000MHZ HFF-MCF-721-76.000000MHZ HFF-X2520A312.135000MHZ HFF-X2520A312.135MHZ HF-G100