This is an edit to the Marantz 2250 Lamp Housing
(Credits for the original go to dwlocks (http://www.thingiverse.com/dwlocks)! You can find that model here: http://www.thingiverse.com/thing:30132)
- Edited the model to include an angle in the top interior (for easier 3D printing without supports)
- I have removed the middle supports in the back (due to conflicts with the way tabs are bent over time --only a few mm difference, but I found them more of a hassle to keep)
- Finally, I have increased the height of the lamp housing hole (to more comfortably fit the board with the fuses in place).
This should fit most --if not all-- Marantz models from the 1970s with plastic housings, but I would be very careful to check and make sure the measurements are accurate to your model.