The adapter was made to replace a 2Kw CP41 bulb (G38 fitting) with a low power bulb to enable vintage Arri and Mole Richardson lamp enclosures to be lit as props for a TV production (ITV Endevour, in 2019).
On set an incandecent bulb was used, but it is recomended that only LED fittings are used as incandecent bulbs in an enclosure can get too hot for some FDM plastics!.
The part uses M5 screws (35 to 45mm long) as the "G38" contact pillars, these should be 10 to 11mm dia., which can be made up with washers or similar (see photos). The bulb clamp on G38 holders will clamp securely on a 10 to 11mm washer's edge.
Several versions are included to take BC or A series bulb holders (and a taller version to take golfball style bulbs). Some holders are ~19mm x 20 tpi, so a threaded adapter is included for these, also some thread test pieces, to guage the thread size on your bulb holder). Prints include side covers.
(I will take requests for other sizes, if required)
I printed in PLA @80% for better strength between the captive nut and lock nut.
DP/Lighting cameraman, working in drama and models VFX. Background in electronic and mechanical design, including photographic adapters and accessories.
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