I usually make Ginger beer using the following ingredients:
Sugar, 4-5 cups per gallon of water(I have seen some use 6 cups per gallon of water)
1 lemon peeled, the juice from the lemon
1/2 orange peel, (optional) as it effects the color of the beer
1.5 ounces of Ginger per gallon
4 ounces of raisins per gallon of water(it is recommended to chop up the raisins, but i don't since they stick to the knife, so i just toss them in with the Sugar.
The last item added is the lemon juice.
I boil bottled water in a small pot with the Ginger and the peels for about half an hour and pour it over the sugar in the fermenting tank, mix the sugar in till the liquid clears up, keep the temperature of the whole batch at 75 to 80 degrees F, pitch the yeast. Let it aerate for a couple of hours and when the yeast is taking off the container is covered.
Been making this recipe for a few times and found that ambiance temperature has a lot to do with the length of fermentation. The last batch made took 12 days in warm weather which tells me, it is best to make this wine during warm summer days and bottle for consumption.
I do have proper equipment to measure Sugar gravity and ABV, but don't use any so, i cannot give you any feed back on that...
Side project i have not attempted is to run this beer through a Pot Still and taste the outcome.