monitor switching for two tape decks

Although modern audio amplifiers fre- quently sport an abundance of (seldom- used?) gimmicks, very few amplifiers possess comprehensive tape switching and monitoring facilities. Most have only a single tape socket, with facilities for making a recording onto one tape deck and monitoring that recording, and have no provision for a second tape deck. The simple switching circuits described here will allow recording from disc or other sources onto two tape recorders, either one at a time or simultaneously, with monitoring of both recordings. In addition, transcription from either tape recorder to the other is po·ssible, while at the same time a totally different source (disc, tuner, etc.) can be played through the amplifier.