Protection
About the Protection PCB
Protection is an open source PCB design by FordPrfkt, published on GitHub. It is a 2-layer board measuring 80 × 50 mm, with 25 components from 24 distinct parts.
By type, the board carries 10 resistors, 4 connectors, 4 diodes, 2 transistors, 2 capacitors and 1 relay.
It belongs with the audio designs in this gallery.
From the project
Tube Amplifier using KT88 Tubes based on BlackCat
Protection bill of materials (BOM)
25 components, 24 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BC546 | TO-92_Inline | Q1 |
| 1 | BC327 | TO-92_Inline | Q2 |
| 1 | Transformer | TE_MATE-N-LOK_1-770866-x_1x02_P4.14mm_Vertical | J1 |
| 1 | 12V_In | Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J3 |
| 1 | Standby | Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J4 |
| 1 | Speaker | Jack_speakON_Neutrik_NL2MD-V_Vertical | J5 |
| 1 | FINDER-40.52 | Relay_DPDT_Finder_40.52 | K1 |
| 1 | 250k | Potentiometer_Piher_PT-10-V10_Vertical_Hole | RV1 |
| 1 | Reset | SW_PUSH_6mm_H7.3mm | SW1 |
| 1 | 1N4007 | D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 2 | 1N4148 | D_DO-35_SOD27_P10.16mm_Horizontal | D2, D3 |
| 1 | LED | LED_D3.0mm | D5 |
| 1 | 47nF | C_Disc_D3.4mm_W2.1mm_P2.50mm | C1 |
| 1 | 47µF | CP_Radial_D5.0mm_P2.50mm | C2 |
| 1 | 1k5 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 47k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | 10R | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | 3k3 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 33k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
Show 4 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7 |
| 1 | 4k7 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8 |
| 1 | 100R | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9 |
| 1 | R | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R11 |
Protection design files
The KiCad project lives in the FordPrfkt/KT88-Amp repository on GitHub; these links point at the commit this page was built from.
Protection: common questions
How big is the Protection PCB?
The Protection measures 80 × 50 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Protection?
25 components, from 24 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Protection design files?
From the FordPrfkt/KT88-Amp repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Protection design in my own project?
The repository has no license, so all rights stay with FordPrfkt. Use it as a reference, and ask the author before reusing the design.
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