roger bleep

6-42 — elektor june 1981 roger bleep E.R. de Jager - PE1 DQL The Roger bleep is getting to be more and more popular with Hams and other transceiver users. Various versions have been available for some time but the circuit described here differs from its counterparts in that it gives a gonglike sound. This adds a personal "note" to the end of transmissions. The transceiver is normally operated by the push to talk (or PTT) switch on the microphone. Usually, when this is pressed it will earth a pin in the micro- phone socket causing the transmit/ receive relay to be operated. The PTT switch is shown as S2 in the circuit diagram. The connections to S1a and the bleep output can all be made at the microphone socket inside the transceiver. Operation is as follows. Referring to the circuit diagram in figure 1, switch S1 will be in the "b" position for thg. bleep to be selected. During a trans- mission the PTT switch will be closed and the transmit relay is operated via transistor T1. Ca...