(Was also posted to the LargeFormat website.) Hi, To those who own the Saunders/LPL enlarger -- and -- to the great electrical engineers of the world who happen to be photographers. I own a Saunders/LPL 4500II 4x5 enlarger from before OmegaSatter took over the line. I just purchased a new power supply from B&H http://www.bhphotovideo.com/bnh/controller/home?O=productlist&A=details&Q=&sku=90222&is=REG. Note that the picture on the website is not accurate - the power supply being shipped is different - OmegaSatter is now shipping the original power supply developed by LPL (part #200400). Unfortunately the new power supply is not compatible with my old power supply. The 4-prong connection on the cable that runs from the enlarger to the power supply doesn't fit! I talked to Customer Service at OmegaSatter and they said that "Saunders bastardized the enlarger by developing a different power supply than designed by LPL." She told me that Hazlow Electronics in N.Y. (585-325-5323) developed the Saunders version of the power supply. She also said that they have had customer complaints about the new power supply not fitting the old-style connection to the enlarger, but do not have a solution. In other words, I am SOL. So now my questions: I write software for a living and know little about electronics, but I am hoping I can use the new power supply. I called and left a message for Larry at Hazlow Electronics and hope he will be able to help. But failing that, I am hoping someone here can help. Does anyone have a schematic for the old power supply? The cable that plugs into the power supply has 4-pins: but I don't know which pins are for what (options are: fan, lamp, ground). The new power supply schematic states the following (formatting below is what they show): No.1-2pins to Lamp. No.3-2pins to Fan. No.4-to Earth So I take this strange formatting to mean that Pin #2 is doing double-duty. It is serving both the Lamp & Fan, and that Pin #4 is ground. Does anyone know where I can buy the 4-prong connector for the new power supply? (This assumes you know what it looks like -- I don't have a picture of it, but it is a round connection with 4 inputs. How is that for a description?) Could there be such a thing as an electrical adapter that would fit the old connector & the new connector? (This assumes you know what the old connector & new connector look like. Do I need to do a Google search?) Has anyone else come across this problem? Do you have a solution? I bought the power supply as a backup because of the great price ($160 vs $360 or whatever other places are selling it for). Fortunately my old power supply still works! But I'd like to know if I can get the new power supply to work with my enlarger, otherwise I'll return it to B&H. Thanks!