sinara-hw/Booster

Booster HL assembly notes

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gkasprow commented

Booster HL uses the same mechanics as regular Booster.
However, it requires attention during assembly.

  1. the Hybrid needs to be soldered manually. The leads must be touching the white line
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  2. The heat transfer block must be covered by Kapton tape from one side. The tape must be trimmed to not break the thermal interface on the upper/bottom side of the block
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  3. The block must be covered by heat transfer paste. I used a copper-based one. I apply the paste, place the block, slide it a bit, then remove it and fill paste in white spots.
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  4. The block must be secured using two M3x9 or M3x10 countersunk screws
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  5. The Hybrid leads must be bend. Make sure that first leads are bent by 90 degrees close to the PCB edge, than complete the cycle.
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  6. Apply the thermal paste to the heat transfer block
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  7. Attach the Hybrid using two M2.5x15 screws
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  8. Insert connector alignment piece.
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  9. Fasten the SMA nuts. Important, do it before attaching the PCB to the channel enclosure
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  10. Insert and fasten all screws except for one that must be not installed, otherwise it would create short-circuit.
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  11. Get rid of the tantalum capacitor. It is colliding with a Hybrid enclosure.
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  12. Proceed as usual. No bias calibration is needed because we don't use bias adjustment. There is an option to enable this feature, which needs a resistor to be assembled and further tests.