His name is Alan Chartock.
According to this in their June 2010 fund drive they raised $800,000 in seven days.
Hunting around a little more they conduct three fund drives a year, in February of this year they raised $1,001,835 from 8,674 pledgers in 11 days.
I believe they basically keep the fund drive going until they reach the goal and then it’s done.
I used to donate to the PBS TV station here. However, I quit doing that when they started calling me on the phone, and would NOT quit calling me, no matter how often I asked them to cut it out. It seems that they have a right to call me if I donate, and that they WILL call me if I donate.