Class H AB
About the Class H AB PCB
Class H AB is an open source PCB design by OSHE-Github, published on GitHub. It is a 2-layer board measuring 122 × 63.5 mm, with 45 components from 27 distinct parts.
Other key parts include the AD820ARZ, IRS2153DSPBF, SIR870DP-T1-GE3 and OPA454AIDDA. By type, the board carries 14 resistors, 12 test points, 7 transistors, 5 ICs, 4 capacitors and 3 connectors.
It belongs with the audio designs in this gallery.
From the project
Specifications were defined throughout the process, both to guide the design and to evaluate the actual performance of the completed design. Common amplifier specifications listed on commercial designs include those shown in Table 1, including more which do not apply, are difficu
Specifications were defined throughout the process, both to guide the design and to evaluate the actual performance of the completed design. Common amplifier specifications listed on commercial designs include those shown in Table 1, including more which do not apply, are difficult to set a target for, or are not easily testable. Target values were defined based on typical values and on what was a reasonable goal for this project. The specifications and their values are listed in the table below.
Main components on the Class H AB
Class H AB bill of materials (BOM)
45 components, 27 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AD820ARZ OPA454AIDDA | DDA0008J_NV | U1 |
| 1 | IRS2153DSPBF MJE15032G | TO-220AB_ONS | U2 |
| 1 | SIR870DP-T1-GE3 MJE15033G | TO-220AB_ONS | U3 |
| 1 | SIR870DP-T1-GE3 MJE15032G | TO-220AB_ONS | U4 |
| 1 | OPA454AIDDA MJE15033G | TO-220AB_ONS | U5 |
| 2 | Q_PNP_ECB | TO-126-3_Vertical | Q1, Q3 |
| 3 | Q_NPN_ECB | TO-126-3_Vertical | Q2, Q4, Q5 |
| 1 | MJL21194 | TO545P2030X530X2900-3 | Q6 |
| 1 | MJL21193G | TO545P2030X530X2900-3 | Q7 |
| 3 | CONN_01X02 TB002-500-02BE | CONN_TB002-500-02BE_CUD | J1, J2, J3 |
| 12 | 5000 | KEYSTONE_5000 | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 +4 |
| 1 | 2.2N 1n | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | 2.2N 30p | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2 |
| 1 | 10U 0.1u | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3 |
| 1 | 0.1u | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C4 |
| 1 | 33K 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 330 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 3.9K 20k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3 |
| 1 | 12K 100 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 3.3K 40k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
Show 7 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 82K 40k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 4.7K 3.6k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R7 |
| 1 | 12K 1.1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8 |
| 2 | 100 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R10 |
| 1 | 330 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R11 |
| 2 | 1.5K 0.33 | R_1020_2550Metric_Pad1.33x5.20mm_HandSolder | R12, R13 |
| 1 | 1.5K PV36W102C01B00 | POT_PV36W_MUR | R14 |
Class H AB design files
The KiCad project lives in the OSHE-Github/Class-H-Amplifier repository on GitHub; these links point at the commit this page was built from.
Class H AB: common questions
How big is the Class H AB PCB?
The Class H AB measures 122 × 63.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Class H AB?
45 components, from 27 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 Class H AB design files?
From the OSHE-Github/Class-H-Amplifier 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 Class H AB design in my own project?
The repository has no license, so all rights stay with OSHE-Github. Use it as a reference, and ask the author before reusing the design.
More boards in Class-H-Amplifier
Similar boards
PicoGUS Hand386
polpo
29.2 × 75.2 mm43 parts4LGPL-2.0800
OtterCastAudioV2
Ottercast
50 × 49.3 mm216 parts4LMIT665
OtterCastAmp
96 × 100 mm250 parts4LMIT341
FunBox
GuitarML
59.7 × 67.5 mm63 parts2LMIT278
Eurorack pmod
apfaudio
35 × 110 mm116 parts4LCERN-OHL-S-2.0239
XassetteAsterisk
SdtElectronics
56 × 56 mm137 parts2LCERN-OHL-W-2.0229