| 摘要 |
PURPOSE:To prevent a beat failure, by triggering bias oscillating circuits of a device consisting of plural cassette tape recorders and a radio receiver mutually and switching the frequency of the oscillating circuits with an interlocking switch. CONSTITUTION:Plural cassette tape recorders 1, 2 and a radio receiver (not shown in figure) are formed incorporatedly to constitute a cassette tape recorder with radio receiver. Recording heads RH1, RH2 and erasing heads EH1, EH2 are biased with sound recording bias oscillation circuitsI, II of the recorders 1, 2. Output terminals T11, T22 and trigger input terminals T21, T12 of the circuits I, II are connected with a trigger line TL. A capacitor C is provided at radio reception by switching changeover switches Sa, Sb interlockingly. Thus, both oscillating frequencies are locked to be coincident and the beat failure is prevented. |
