Difference between revisions of "Kits and Parts Universal Wideband Small Signal RF Amplifier"
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== SPICE Simulation == | == SPICE Simulation == | ||
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+ | * [http://ltwiki.org/index.php?title=Standard.bjt 2SC5551A SPICE Model] | ||
[[file:K&P_LTSPICE_RF_AMP.PNG]] | [[file:K&P_LTSPICE_RF_AMP.PNG]] |
Revision as of 16:53, 7 October 2021
Contents
Specs
- Kits and Parts Universal Wideband Small Signal RF Amplifier
- 22+ dBm power gain from 2-30 MHz
- 50 ohm input and 50 ohm output.
- 100 milliwatt maximum output.
Schematic
Transformer
SPICE Simulation
PCB
Build Instructions
- Align the SMD 2SC5551A RF Transistor onto Q1 pad in the center of the PCB. Using a temperature controlled solder pencil, solder without overheating.
- Align the four 100n SMD capacitors on the PCB and solder.
- Install resistors R1, R2, R3 and R4 on the PCB and solder.
- Install Toroids Transformer T1, Twist the Red & Green wires together to about 4 twists per inch. Wind 10 turns of the twisted wires onto the toroid. The magnet wire is heat stripable; trim each wire end to 3/4 inches. Prepare the toroid wires for soldering. Magnet Wire Soldering Details Here: One of each colored wires connects under the toroid and one of each colored wires connects on the outside of the toroid. One color wire should connect to J3/C4 and the other color connects to Q1. You should also have 2 different color wires connecting under the toroid via a PCB trace.
- R5,6,7 (not included) are used to attenuate the rf output. Place a jumper wire across R6.
- Connect the RF Amplifier via J1(input), J2(output) and J3(power).