RF input 50Ω L1, L2: Ferroxcube VK200 19/4B ferrite choke 56pF T1 9:1 100Ω 1/4W 10nF 5600pF 470pF 5600pF 10nF 1KΩ POT L3, L4: 6 ferrite beads each Ferroxcube 56 590 65/3B Gen Pur Diode T1: Ferrite core Stackpole 57-1845-24B T2: 7 turns of twisted pair AWG #20, Ferrite core Stackpole 57-9322 15Ω L1 L2 SM341 + L3 SM341 15Ω 0.33uF - 10uF 150V T2 0.1uF 75pF 0.1uF 100V 47uF T3a T3b DRN BY: E Cunningham 9/27/2002 9/27/2002 + Elec: E Cunningham 9/27/2002 50 V + MECH: E Cunningham 13kΩ 0.33uF 1/4W L4 8.5kΩ 1/4W T3: 14 turns of Microdot 260-4118-00 25Ω miniature coaxil cable wound on each toroid, Stackpole 57-9074 RF output 50Ω Polyfet RF Devices A TB172 2-30MHz 300W SM341 push-pull Vds=50V Idq=1.2A Top View of TB172 Dual SM341 50V 300 Watt 2-30 Mhz