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Classified: 50W HF Amplifier for QRP radios Removed

Date Posted By Category User IP Address
2023-03-19Login requiredHF AmplifiersLogin required
50W HF Amplifier for QRP radios
Tried for fun now surplus to my needs. Works best with a manual tuner as there are no output band pass filters. 80 Meter qrpkits.com filter included. $60.00 plus shipping from 91906.
Description
Built-in TX/RX auto cut circuit, no need for special PTT line, RFsignal input automatically switches to transmit mode. Built-in fan when the PA temperature reaches a set value.
Operating frequency: 3~24Mhz.
Transmission and pulling power: 1?5W.
Output power: 50W.
Interface impedance: 50?.
Operating voltage: DC12~13.8V.
Working current: 6~9A.
Before use, you need to use nanoVNA or similar tools to determine the transmitting antenna impedance of 50?, SWR < 1.5. Otherwise, the power transmitter tube will be damaged due to the mismatch of transmitting impedance!