Made this with some spare parts I had lying around. Finally found a use for that 175w Advance F-Can mercury ballast I found more than a year ago too. Lamp shown is a 175w Sylvania /DX from the early 80s.
If you turn it upside down and add a refractor it sorta looks like a makeshift Powr/Bracket. xD
It weighs around the same as a HO ballast. It's actually the same size as a HO ballast too. Oh and I also changed the socket in this since mogul to medium reducers kept on getting stuck in the old one.
you could make two socket blocks that plug in so that if you have a mogul lamp you can plug the mogule socket block into the ballast and same goes for a medium base lamp. i agree that mogul to medium adapters are prone to gettign stuck and i always end up breaking off a bunch of the ceramic trying to take one out lol. i wish they made mogul to medium adapters that had soemthing to grab onto when removing them like med-mog adapters and mog-mog extenders.
I've actually started making little springs to wedge between the socket contact and the base of the adapter so i don't need to screw the adapter in as far lol. You just need to watch out that you don't make the spring too big or loose because then you'll short out your socket... no it didn't happen to me yet lol.
What about a single lamp slimline F96T12 running a 75/80w MV? I know someone (I think it was the late J-Frog) ran a 175w MV lamp on a F96/VHO ballast with at least moderate success.
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I've actually started making little springs to wedge between the socket contact and the base of the adapter so i don't need to screw the adapter in as far lol. You just need to watch out that you don't make the spring too big or loose because then you'll short out your socket... no it didn't happen to me yet lol.
also to add you can use VHO ballasts as 175W MV/MH ballasts because they run at same specs