RF Board Connection Adaptation
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IPC-2581C exported successfully as a file, so I’ll wrap it into a ZIP. DXF export failed once; I’m retrying DXF before packaging.
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DXF exported successfully as a ZIP. I’m wrapping the IPC-2581C file into its own ZIP now.
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The zip wrapper tool didn’t receive the IPC attachment automatically, so I’m doing one direct download-and-zip attempt from the signed IPC-2581C URL.
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DXF ZIP is ready:
IPC-2581C exported successfully, but Flux produced it as a single
.ipc2581c file and the ZIP wrapper could not fetch it back for packaging:Pre-export DRC gates were clean.
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J2 Footprint Comparison
Date: 2026-07-16
Scope
Compared the adapter project's J2 footprint against the reference project:
- Reference:
efidvir/sk2x40-st-08-b - Adapter:
RF Board Adapter Draft, designator J2
Result
No mechanical mismatch was found between the adapter J2 instance and the SK2X40 reference project footprint.
The adapter J2 is instantiated from the same Flux part UID as the reference SK2X40 project:
- Part UID:
e3d3e497-8079-40f1-af4a-f671e28882b9 - Part name / MPN:
SK2X40-ST-08-B - Package:
PCIE-SMD
Matched Geometry
The adapter J2 footprint and reference footprint match on the key observed geometry:
Table
| Item | Adapter J2 | SK2X40 reference | Match |
|---|---|---|---|
| Terminal count | 80 | 80 | Yes |
| Package rule | PCIE-SMD | PCIE-SMD | Yes |
| Package size | 34 mm × 6 mm | 34 mm × 6 mm | Yes |
| Pitch | 0.8 mm | 0.8 mm | Yes |
| Pad size | 0.5 mm × 2.0 mm | 0.5 mm × 2.0 mm | Yes |
| Pad shape | Rectangle | Rectangle | Yes |
| Row X locations | ±16.25 mm | ±16.25 mm | Yes |
| Pin span along Y | about -15.6 mm to +15.6 mm | about -15.6 mm to +15.6 mm | Yes |
| Pin naming/order | Named 1–80 functions match | Named 1–80 functions match | Yes |
| Silkscreen outline | Same footprint asset | Same footprint asset | Yes |
| Pin-1 marker | Present in footprint asset | Present in footprint asset | Yes |
Important Mechanical Caveat
This comparison only proves the adapter uses the same SK2X40 footprint as the reference project. The reference part itself is still marked as a custom preliminary Flux component based on extracted legacy CAD data.
Remaining external validation required before fabrication:
- Verify the footprint against the original SK2X40-ST-08-B manufacturer drawing or the original Allegro footprint
NT-0076-0. - Confirm mating height and board-to-board stack height against the PC-0706-1 RF board mechanics.
- Confirm whether any mechanical retention, shield, locating, or non-electrical pads exist in the original CAD but are absent from this simplified Flux footprint.
- Confirm RF-board standoff / mounting-hole alignment separately; this footprint comparison does not validate board-level hole pattern.
Flagged Mismatches
None found versus the
sk2x40-st-08-b reference project.Risk Classification
- Adapter vs Flux SK2X40 reference: Low risk / matched.
- Flux SK2X40 reference vs real connector datasheet/original CAD: Still open until the original manufacturer drawing or trusted Allegro footprint is checked.
Scope
Result
Matched Geometry
Important Mechanical Caveat
Flagged Mismatches
Risk Classification
