Wow! 36 cups. She's a beaut! Looks like a nice choice for a percolator that you use on your propane stove.
As the new Great Lakes Chapter director for Tear Jerkers, I like to have morning coffee and bull sessions at my campsite since it is a great way to start every morning, especially on Sundays when otherwise, people would tend to drift out of the campgrounds back to their homes and not interact very much. I did quite a bit of research and in the end, I bought an Aroma Stainless Steel 40-cup Coffee Urn on Overstock.com for $55.99 (free shipping at the time). Amazon.com sells them too. This is an electric perculator. See
http://www.amazon.com/gp/product/B001K4 ... SR5FVFR46X. Several good points about this particular model. First, there is an external gauge to show you how much coffee is left in the urn so you know when you will be running out. Many urns, even more expensive ones, don't always have this convenient and important feature. Also, it handles 40 cups, which is a nice size. Of course, "one cup" of coffee is meant to be 6 fluid ounces in an 8 ounce styrofoam cup, which means you are getting about 240 ounces (1.9375 gallons). I've used this for one of my gatherings thus far and I had perhaps 4 or 5 cups left at the end of the morning for 12 or 13 people. On average, most people had two cups of coffee using their own coffee cups (of varying capacities). In addition, this model has a double wall for great insulation. While it will keep the coffee piping hot for hours after you make it (if you keep it plugged in), even after being unplugged, the coffee stayed pretty warm and very drinkable for quite a while because of the double wall. The double wall also means you can touch it without getting badly burned as you would with single walled perculators. Finally, it was reasonably fast. Most coffee urns say that for every cup you're making, it will take one minute to heat the water. I think this one was closer to 25-30 minutes for 40 cups but I wasn't timing it.
My co-director, Scuba Jeff, also has a similar coffee maker. As our gatherings get larger, we can use both of them to keep the coffee flowing all morning long without any interuptions.