Gettysburg College was mentioned as a main source of Civil War signal corps officers in a June 15 Pittsburgh Tribune-Review article about reenactments.
From the Trib:
The main requirement for becoming a member of the signal corps was an ability to read and write, so most members were recruited from colleges, with a large number coming from Gettysburg College. Others who qualified were recruited from infantry, cavalry and artillery units.
The signal corps had no specific uniform, so members wore whatever uniform was available. Foster wears an artillery uniform, sometimes complemented with an infantry greatcoat. Signal corps members are identified only by insignia worn on their hats. Foster explained that a signal kit consisted of seven flags of different patterns and sizes as well as metal torches, to be used for night signaling. The kit was transported in a wagon.