LPF
About the LPF PCB
LPF is an open source PCB design by kholia, published on GitHub. It is a 2-layer board measuring 36.4 × 20.8 mm, with 10 components from 3 distinct parts.
By type, the board carries 6 capacitors and 2 inductors.
From the project
HF-PA-v10 ;) Is this the end of the search for a 5W Digital PA? HF-PA-v10 is now a rugged 10W PA! We also do 100W+ now ;)
We need a QRP PA which does NOT blow up (unlike those 3xBS170 and 4xBS170 designs). We believe that if the FETs blow up (despite best practices and intentions but under less-than-ideal external conditions), then the design has FAILED!
Update (August-2024): https://github.com/kholia/HF-PA-v10/tree/master/IRFP-Hacks-v5-SMD (or v4 for THT regulator) and SUPSiC GC2M0280120D is all you need for 30W All-HF PA for 4 USD. For 30W All-HF PA @ 8.5 USD, my tested MOSFET is CREE C2M0280120D. Use 7815 regulator for powering the UCC gate driver when using the C2M0280120D MOSFET. SUPSiC GC3M0280090D works…
LPF bill of materials (BOM)
10 components, 3 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | SMA | SMA_Samtec_SMA-J-P-H-ST-EM1_EdgeMount | IN1, OUT1 |
| 2 | L_Small | L_Toroid_Vertical_L10.0mm_W5.0mm_P5.08mm | L1, L2 |
| 6 | 100n | C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C5, C6 |
LPF design files
The KiCad project lives in the kholia/HF-PA-v10 repository on GitHub; these links point at the commit this page was built from.
- Layout5-Pole-LPF/LPF.kicad_pcb
- Schematic5-Pole-LPF/LPF.kicad_sch
LPF: common questions
How big is the LPF PCB?
The LPF measures 36.4 × 20.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the LPF?
10 components, from 3 distinct parts. The full bill of materials is listed on this page.
Where can I download the LPF design files?
From the kholia/HF-PA-v10 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the LPF design in my own project?
The repository has no license, so all rights stay with kholia. Use it as a reference, and ask the author before reusing the design.
