Optimized build of 45W CW/SSB HF amp. RF_AMP_530_V308 Vcc = 12 to 15V, 14.5V is good. Expect max 6A draw. --- Bill of Materials --- Ref. Mfg. Part No. Description C1 -- -- capacitor, 100nF C2 -- -- capacitor, 100nF C3 Nichicon UPR1E102MRH capacitor, 1000uF, 25V, Electrolytic C5 -- -- capacitor, 10nF C7 -- -- capacitor, 100nF C8 -- -- capacitor, 10nF C9 -- -- capacitor, 10nF C10 -- -- capacitor, 10nF C12 -- -- capacitor, 10nF C13 -- -- capacitor, 10nF C14 -- -- capacitor, 10nF C15 -- -- capacitor, 10nF C16 -- -- capacitor, 10nF, DO NOT PLACE this part unless you want more input sensitivity. C17 -- -- capacitor, 10nF C18 -- -- capacitor, 10nF C29 -- -- capacitor, 100pF C30 -- -- capacitor, 100pF C31 -- -- capacitor, 100nF C32 -- -- capacitor, 100nF C91 -- -- capacitor, 100nF , not shown in Spice circuit. C92 -- -- capacitor, 100nF C94 -- -- capacitor, 100nF C95 -- -- capacitor, 100nF C96 -- -- capacitor, 100nF C97 -- -- capacitor, 10nF C98 -- -- capacitor, 10nF L1_10.turns -- --RFC toroid inductor, 8µH, 20A pk, thicker magnet wire. T1 - do not place, jumper the empty centre tap pad to Q3 collector ------The following 2 virtual inductors make up T2 binocular Xformer (0.4mm magnet wire): 7 turns Pri to 3 turns secondary------------- L2 -- -- inductor, 1.6µH L1 -- -- inductor, 6.5µH --------------------------------------------------------------------------------------------------------------------------- ------The following 3 virtual inductors make up T3 binocular Xformer ( 1mm magnet wire) with 3 turns Primary centre tapped to 7 turns secondary. L3 -- -- inductor, 1µH, 20A pk L4 -- -- inductor, 1µH, 20A pk L5 -- -- inductor, 6.5µH, 20A pk -------------------------------------------------------------------------------------------------------------------------------- L6 -- -- RFC inductor, 220µH L7 -- -- RFC inductor, 220µH --- OEM Semiconductors----- ------LTspice substitutes-------------------- Q1.IRP530 International Rectifier IRFL014 MOSFET model Q2.2SC1971. Zetex ZTX849 bipolar transistor model Q3.2SC3357. Philips 2N2222 bipolar transistormodel Q4.IRP530 International Rectifier IRFL014 MOSFET model D3 OnSemi 1N4148 glass diode D4 OnSemi 1N4148 glass diode U1 LM7809 , not shown in Spice circuit. ----------Resistors are mostly 0805 SMT types------------------------------ R3 -- -- resistor, 220, 3W, Thru hole R4 -- -- resistor, 20 R5 -- -- resistor, 200 R6 -- -- resistor, 5.6 R7 -- -- resistor, 5.6 R8 -- -- resistor, 300 R9 -- -- resistor, 3.3K R10 -- -- resistor, 510, add wires to make the connection or replace with a thru hole version. R11 -- -- resistor, 200 R12 -- -- resistor, 5.6 R13 -- -- resistor, 300 R14 -- -- resistor, 300 R15 -- -- resistor, 510 R16 -- -- resistor, 20 R18 -- -- resistor, 5.1 R19 -- -- resistor, 220, 3W, Thru Hole R20 -- -- resistor, 200 R24 -- -- resistor, 3.3K R25 -- -- resistor, 3.3K R32 -- -- resistor, 300 R33 -- -- resistor, 300 R_LOAD -- -- resistor, 50, Test RF load, not in OEM circuit RV1 Rtot=5K wiper=.7 trimmer pot, used to set output FET (Q1)bias RV2 Rtot=5K wiper=.7 trimmer pot, used to set output FET (Q4) bias