| 摘要 |
PURPOSE:To prevent a beat failure by triggering bias oscillating circuits mutually and locking the frequency, in oscillating the bias oscillation circuits of a tape recorder containing plural cassette tape recorders incorporatedly. CONSTITUTION:Plural cassette tape recorders 1, 2 are contained incorporatedly to form a double cassette tape recorder. The recorders 1, 2 have sound recording bias oscillating circuitsI, II which bias sound recording heads RH1, RH2 and erasing heads EH1, EH2. Outputs T11, T22 of the sectionsI, II and trigger input terminals T21, T12 are connected with a trigger line TL. In switching the sectionsI, II at the same time as the oscillating mode, triggering is performed mutually, the oscillating frequencies are locked and almost the same frequency is oscillated. Thus, the beat failure is prevented. |
