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DIY Dual-tap 100-150w SON/MBI Gearbox: Internals Showing the insides of a gearbox that I threw together for running 100 and 150w high-pressure sodium or metal halide lamps. Nice dual tap Tridonic ballast, ignitor and PFC capacitor. All wired in tri-rated cable, soldered as well as crimped terminals, bootlace ferrules and all earthed covers, the usual stuff. That model of Tridonic ignitor, ZRM 4.5-ES/TC, has rising clamp screw terminals which is very nice indeed.

DIY Dual-tap 100-150w SON/MBI Gearbox: Internals

Showing the insides of a gearbox that I threw together for running 100 and 150w high-pressure sodium or metal halide lamps.

Nice dual tap Tridonic ballast, ignitor and PFC capacitor.

All wired in tri-rated cable, soldered as well as crimped terminals, bootlace ferrules and all earthed covers, the usual stuff.

That model of Tridonic ignitor, ZRM 4.5-ES/TC, has rising clamp screw terminals which is very nice indeed.

387A3433.jpg 387A7501~0.JPG 387A7509.JPG 387A7538.JPG 387A7540.jpg
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Filename:387A7509.JPG
Album name:FrontSideBus / Control gear
Filesize:6374 KiB
Date added:11 Apr, 2026
Dimensions:3070 x 2048 pixels
Displayed:161 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=24440
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Comment 1 to 4 of 4
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Beta 5   [11 Apr, 2026 at 11:27 AM]
Looks good, very professional as always! I do like that dual tap 100/150W ballast, a shame they weren't more common as it would be a nice way to switch between wattages in lanterns too Smile
AngryHorse   [11 Apr, 2026 at 05:51 PM]
Nice, theres two of these high inside the showroom roof at work, long disconnected but in mint condition! I should rescue it really Confused
FrontSideBus   [11 Apr, 2026 at 07:23 PM]
Deffo!!!
Patrick   [12 Apr, 2026 at 11:27 AM]
Looking good Cool plenty of heat dissipation for the Tridonic

Comment 1 to 4 of 4
Page: 1

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