4 input and output impedance 50 ohms. 5 input and output connectors SMA (female). New High frequency RF wideband amplifier 100kHz-3MHz 50W linear power amplifier.Please leave note for your special request e. Please do NOT leave negative or neutral feedback without any contact. We guarantee that your issue will be solved quickly. The item "100kHz-3MHz 50W Medium Long Wave HF RF Wideband Power Amplifier AMP 48V" is in sale since Thursday, August 22, 2019. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Amplifiers". The seller is "daoer1122-3" and is located in . This item can be shipped worldwide.