Abstract: A coin-box placed adjacent to a television receiver is interposed in the path of a signal input line that supplies program signals to the receiver. Signals on some program channel (the "free" channels) are permitted to pass through the coin box at all times. The purpose of the coin box is to require payment for the reception of programs on certain other selected frequency channels (the "pay" channels). One or more band rejection filters (frequency traps) are utilized within the coin box to normally prevent reception of the pay channels. A bypass circuit, controlled by a relay, permits the pay channels to be received during time periods that have been paid for. The coin-box is lockable for security purposes and contains a timing circuit, a relay, and other controls. The selection of pay channels as well as the various control parameters may be adjusted at will by the proprietor of the establishment in which the television set is located.