Ham/Amateur Radio 4m 70MHz High Power 300W Amplifier DIY Kit. Trusted UK Seller.
Following on from the success of our 2m 300W high power amplifier kit, we have retuned and optimised the circuit for the 70MHz 4m band. Mismatch ruggedness: >SWR 65:1. Power Gain: >22.5dB @48V/ 150mA bias (1.5W input required for >300W output).