Feature 1Good Stability: The power amplifier adopts imported RF power amplifier tube for Motorola, which has better linearity and stability 2Good Heat Dissipation: The power amplifier is equipped with a large heat sink, has better heat dissipation and protection 3Working Performance: The working frequency of this amplifier is 1.554MHz, input power is 35W, can provide a high output power 4PVC and Aluminum Alloy Material: This power amplifier is made of PVC and aluminum alloy, features good strength and long last durability 5Application: This liner HF power amplifier board is suitable for YAESU FT817 KX3 CW AM FM HAM radio etc.Item Type: LinearHFPowerAmplifierMaterial: PVC and Aluminum AlloyParameter:Frequency: 1.5-54MHzOperating Voltage Range: DC12-16VInput Power: 3-5WInput and Output Impedance: SMA at 50ohmsAir Cooling: Forced fan cooling .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x LinearHFPowerAmplifierNoteOutput prohibit open circuit, short circuit, prohibit more than 2 Bobbi.