First of all let me say I'm thrilled that CN has a microscope forum. I recently took up astronomy after being interested my whole life. A terrific CN'er took a lot of time out to explain things and really helped me get started. Finally at 56 y.o. I am absolutely enjoying my first telescope but probably would have given up out of frustration if it weren't for the help.
My 14 y.o. son is interested in biomed and science in general. He was asking me for a microscope and I found a used Bausch and Lomb phase contrast microscope. Missing was the illuminator which goes at the base of the scope (see cylindrical void in photo). I believe the scope is a Dynavision based on an article I found along with an owners manual.
I was wondering if Cloudy Days has a classified where I may be able to find a used illuminator. Or perhaps someone could suggest a DIY solution for lighting the field. I think the original illuminator is shown in the attached screenshot along with a diode-type replacement which looks like it has a huge transformer with cooling fins. I'm assuming it may be an older technology replacement.
I see some modern day illuminators have a dedicated power supply and can cost several hundred dollars. I also saw 18 Watt replacement bulbs for the Bausch and Lomb scope on Amazon for $30ish so I'm a little confused. Is there something I'm missing? Is the light source more complex than just "X" watts at the frequencies of incandescent light or "Y" watts at led frequencies? Any help or insight would be greatly appreciated.