top-layout1.png

Print this out to aid during assembly

Portable Network Graphics (PNG) - 64.78 kB - 12/18/2016 at 22:33

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bottom-layout1.png

Print this out t aid during assembly, 10uH axial chokes provide lead cuttings for the 2 Vias.

Portable Network Graphics (PNG) - 48.78 kB - 12/18/2016 at 22:33

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IMAG0714.jpg

Layout guide for component placement. printed out.

JPEG Image - 1.22 MB - 12/08/2016 at 16:49

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25mm SG504 head faceplates.pdf

Do not scale or print to fit. Cut , then attach with a glue stick.
Align drill bit to center points.. Deburr after drilling. I use a vice grip and a drill press with jeweller's files to deburr. 3/16", 7/32" & 1/4" HSS holes.

Adobe Portable Document Format - 204.23 kB - 12/08/2016 at 19:33

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IMAG0721.jpg

Marking the enclosure face plate drill points. Optional approach using a pencil,. Simpler to stick the cutout paper template onto the metal.

JPEG Image - 806.78 kB - 12/08/2016 at 16:57

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IMAG0716.jpg

SMA drill hole (1/4" dia)

JPEG Image - 901.57 kB - 12/08/2016 at 16:57

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IMAG0722.jpg

Drilled face plate for cables

JPEG Image - 1.33 MB - 12/08/2016 at 16:57

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IMAG0720.jpg

SMT component assembly in progress, fine tip soldering iron, 280°C for 60/40 solder. Note the 49.9Ω SMT resistors are installed with the marking side facing the PCB! This reduces parasitic inductance.

JPEG Image - 1.75 MB - 12/08/2016 at 17:03

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IMAG0725.jpg

PCB /Enclosure fitment...may require a bit of PCB edge filing for precision.

JPEG Image - 2.63 MB - 12/08/2016 at 17:00

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IMAG0594.jpg

Prep. the LEMO to SG504 connector END. Note the folded back shield wire on the cable to contact the metal sleeve & the wire colors, which align with the pins.

JPEG Image - 664.28 kB - 12/08/2016 at 16:59

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IMAG0597.jpg

LEMO connector assy. in progress. See the order of the connector parts lined up on the cable for final assy. Petroleum jelly eases assembly. There is notch on the shiny metal sleeve that aligns with the ceramic tip. Note the wire colors align with the pins.

JPEG Image - 920.81 kB - 12/08/2016 at 16:59

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IMAG0599.jpg

Finished LEMO connector assy.

JPEG Image - 1.03 MB - 12/08/2016 at 16:59

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IMAG0728.jpg

Prep the 4 wire & shield 'LEMO' cable end for PCB. Note the color codes, they match the markings on the PCB.

JPEG Image - 1.01 MB - 12/08/2016 at 16:58

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IMAG0737.jpg

LEMO cable for PCB connection

JPEG Image - 1.99 MB - 12/08/2016 at 16:58

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IMAG0738.jpg

Installation of the BNC pigtail input . The Cable shield is trimmed and soldered to the PCB ground plane. Be careful not to leave stray bits of shield wire loose. I used a bit of the Choke lead cutting soldered to the centre core for easier installation.

JPEG Image - 1.36 MB - 12/08/2016 at 17:01

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IMAG0739.jpg

Hot glue to secure the input cables (after testing)

JPEG Image - 1.75 MB - 12/08/2016 at 17:01

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