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philips exc the 35/55w ones came from fife around 10 years ago, since then i have bought the others, 66w being the latest and the last one. they seem reliable and are not potted like most hid electronic, so a repair could be possible if needed, that said if i remember there are surface mount parts inside. there was never a 131/180 or 18w version made, i don't know why

philips exc

the 35/55w ones came from fife around 10 years ago, since then i have bought the others, 66w being the latest and the last one. they seem reliable and are not potted like most hid electronic, so a repair could be possible if needed, that said if i remember there are surface mount parts inside. there was never a 131/180 or 18w version made, i don't know why

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Filename:DSC02276.JPG
Album name:thorncollector / lamps new and old
Filesize:3254 KiB
Date added:10 Apr, 2020
Dimensions:2730 x 2048 pixels
Displayed:21 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=13614
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Kev   [10 Apr, 2020 at 11:49 PM]
Interesting line up! Was one ever made for 135W? As the mag ballasts do seem quite lossy for SOX these would up the efficiency a lot. I have a good few 55 and 35W ballasts but no other sizes.
thorncollector   [11 Apr, 2020 at 01:43 AM]
nope 135 was another wattage that was not made, forgot to mention that
Danny   [11 Apr, 2020 at 06:04 AM]
Might be able to run a 135w off a 91w Ballast?
Ash   [11 Apr, 2020 at 07:22 AM]
HF efficiency advantage may be not so great with the higher power lamps. Maybe with SOX there is no possibility to improve the lamp efficacy with HF like with Fluorescent either due to it running too cold if driven at lower power ?
FrontSideBus   [11 Apr, 2020 at 11:31 AM]
I’d love to get this on a scope to see if it’s driving them with a sine wave like a HF fluro ballast or square wave like electronic HID ballasts.
thorncollector   [11 Apr, 2020 at 01:00 PM]
i have a scope, but don't think i have a x10 probe
thorncollector   [11 Apr, 2020 at 01:04 PM]
no sox/sox-e are different, you can getaway with 91w on 135w gear em, but the 135w lamp will draw to much power from the ballast and overload it. 0.62A vs 0.9A the current is lower in this case so the voltage will be higher and hence power
Ash   [11 Apr, 2020 at 01:30 PM]
You can make a voltage divider. Either way, there is also the measurement Earth issue to take care of
FrontSideBus   [11 Apr, 2020 at 02:54 PM]
I have a 20meg HV differential probe for playing about with stuff on the mains.

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