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Amateur Radio

Power Amplifier Henry 5K Premier

Plate circuit. Plate choke. Very short connection. No traditional coils and resistors. Own resonate plate circuit near 125 MHz. Used two plate chokes, connected serial. Output capacitance of two tubes and stray capacitance is about 56 pF, so plate capacitor used only for 80 and 160 meters band. Plate choke consist of two chokes.

2x8877 Plates. Plate choke. Very short connection. No traditional coils and resistors. Own resonate plate circuit near 125 MHz. Used two plate chokes, connected serial. Plate capacitor used only for 80 and 160 meters band.

Coil 160 meters. For 160 meter I used two coils. One inside another. Coils located under main variable coil.

Antenna relay, QSK board, L section of PiL network. Vacuum antenna relay. QSK control board. Vacuum relay installed on the rubber plate. Switching created very low level of clicking noise. Coils of antenna relay and input relay connected serial and use high voltage power supply.

Antenna relay, QSK board, L section of PiL network. Vacuum antenna relay. QSK control board. Vacuum relay installed on the rubber plate. Switching created very low level of clicking noise. Coils of antenna relay and input relay connected serial and use high voltage power supply.

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- circuit diagram of the amplifier, power supply unit, large photos, test results and anode circuit calculation program

© V.Dmitriyev 2018