SYNCHRO-DUBBING CIRCUIT OF TAPE RECORDER

摘要

PURPOSE:To improve the operability for dubbing by using a switch used by a muting circuit to keep a tape deck of the recording side in a recording mode until a slide base reaches its working position. CONSTITUTION:When the synchro-dubbing is carried out, the 2nd reproduction switch 14 and a sound recording switch 15 are turned on after setting a cassette tape. Then the 1st reproduction switch 10 is turned on after loading a tape to be dubbed to the 1st deck. Thus the 1st motor 10 is revolved to start reproduction of the tape cassette. While a switch 19 is turned off and therefore the power supply voltage is delayed by a delay circuit 20. This delayed voltage is applied to the base of a muting transistor 21 to turn on this transistor. Thus the muting signals so far applied to the base of a control transistor 16 are extinguished. Then the 1st control transistor 13 is turned on to drive the 2nd motor 12. Thus the sound signal reproduced by the 1st tape deck is applied as it is to the 2nd tape deck and recorded.